Kester, O Ames, F Emhofer, S Habs, D Henry, S Reisinger, K Rudolph, K Sieber, T Cederkäll, J Forstner, O Wenander, F Wolf, B Ratzinger, U Schempp, A Repnow, R Scheit, H Schwalm, D Von Hahn, R acceleration ion-source 2002 2002 Kester, O Ames, F Cederkäll, J Forstner, O Nilsson, T Wenander, F Van den Bergh, P Bongers, H Emhofer, S Habs, D Rudolph, K Sieber, T Von Hahn, R 2001 2001 Nilsson, T Äystö, J Forstner, O Ravn, H L Oinonen, M Simon, H Cederkäll, J Weissman, L Habs, D Ames, F Kester, O Sieber, T Bongers, H Emhofer, S Reiter, P Thirolf, P G Bollen, G Schmidt, P Huber, G Liljeby, L Rensfelt, K G Skeppstedt, Ö Wenander, F Jonson, B Nyman, G H Von Hahn, R Podlech, H Repnow, R Gund, C Schwalm, D Schempp, A Kühnel, K U Welsch, C P Ratzinger, U Walter, G Huck, A Kruglov, K Huyse, M Van den Bergh, P Van Duppen, P Shotter, A C Ostrowski, A N Davinson, T Woods, P J Moukha, I Richter, A Schrieder, G AIP Conf. Proc. 265-8 576 2001 2001 The ISOLDE RIB-facility at CERN has today been producing a vast range of radioactive beams since more than 30 years. The low-energy beams of ISOLDE will be complemented by a post-accelerator, REX-ISOLDE, currently being assembled. In order to convert the pseudo-DC, singly-charged beam from the ISOLDE mass separators into a cooled and bunched beam at higher charge states a novel scheme of trapping, cooling and charge-state breeding has been devised, using a linear Penning trap and an Electron Beam Ion Source (EBIS). This allows for subsequent acceleration by a short, cost-effective LINAC consisting of an RFQ, an IH-structure and three seven-gap resonators, reaching 0.8 - 2.2 MeV/u. The installation of REX-ISOLDE is well underway and the first post-accelerated radioactive beams are expected to be obtained during late 2000. Forstner, O 2001 2001 REX-ISOLDE is a post-accelerator for radioactive ions located at the ISOLDE facility at CERN. Its task is to accelerate the radioactive ions coming from the on-line mass separator ISOLDE from 60 keV to a final energy of 2.2 MeV/u. To achieve this goal with a compact and cost-efficient setup a new concept was proposed. First the ions are accumulated in a Penning trap (REXTRAP), then the ions are transported to an EBIS (Electron Beam Ion Source), where their charge-state will be increased. Due to the high charge-state of the ions the following linear accelerator can be built comparatively compactly. In the framework of this thesis the construction and commissioning phase of REX-TRAP is described. REXTRAP is a large, gas-filled Penning trap whose aim is to store and cool the radioactive ions coming from ISOLDE. After listing the physics motivation for building REX-ISOLDE and describing its elements, the theory of a Penning trap as well as the setup of REXTRAP is explained. Fi-nally test results for REXTRAP are presented followed by a discussion on how REXTRAP in the present setup can fulfill the demands for the operation of REX-ISOLDE. Schmidt, P Ames, F Bollen, G Forstner, O Huber, G Oinonen, M Zimmer, J AIP Conf. Proc. 10.1063/1.1454338 609-614 606 2002 2002 Fabich, A Benedikt, Michael Lettry, Jacques J. Nucl. Mater. 10.1016/S0022-3115(03)00008-4 109-112 318 2003 2003 Tests on the response of liquid metal targets to high-power proton beams have been performed at ISOLDE/CERN. During these tests, a so- called thimble geometry and an extended version, the trough, filled with liquid mercury were exposed to a 1.4 GeV proton beam with intensities up to 33 multiplied by 10**1**2 protons/pulse. In order to extrapolate the behaviour of a liquid metal target from the kilowatt to the megawatt-scale as required for a neutrino factory, various measurements were carried out with the aim of establishing scaling laws of the splash velocity as a function of beam size, intensity and time structure. The mercury volume was placed in a steel frame, while the region above the mercury level was observed through two quartz windows with a high-speed camera. For the highest intensity available at the PS Booster (33 multiplied by 10**1**2 protons/pulse), the mercury expanded with velocities up to 50 m/s. The splash velocity scaled with the power density of the proton pulse. Increasing the beam size or the pulse duration reduced the velocity. Fabich, A Lettry, Jacques Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(03)00710-1 336-339 503 2003 2003 A liquid metal target is one of the options for the pion production target of a nu-factory. The interaction between a liquid metal and a proton beam were observed with static mercury as well as with a free mercury jet and up to 4 multiplied by 10**1**2 protons/bunch. The experimental method for investigating the magneto-fluid-dynamic effects of a high-velocity liquid metal in a high magnetic field magnet has been validated by recording the behaviour of a 15 m/s mercury burst entering the gradient of a 13 T solenoid at GHMFL Grenoble. The paper includes the description of the optical read-out system as well as numerical results of the mercury drop velocities. Fabich, A 2002 2002 The feasibility of liquid metal jet targets for secondary particle production with high power proton beams has been studied. The main aspects of the thesis were benchmark experiments covering the behaviour of liquid targets under thermal shock waves induced by high power proton beams, and also magnetohydrodynamic effects. Severe challenges were imposed by safety issues and the restricted beam time to the tests in ISOLDE at CERN and at the High Magnetic Field Laboratory at Grenoble. Restricted access times in high radiation level areas were of the order of minutes and in this short time span, the complete experimental setup had to be performed and verified. The involvement of mercury as liquid target material and its activation during beam tests demanded special confinement precautions. The setup for both experiments was based on the use of a high speed camera system for observation of the mercury target. The presence of high radiation or high magnetic field required the installation of the sensitive camera system at distances up to 15 m. The method of shadow photography had to be used because of the highly reflective surface of mercury. During proton beam tests at the CERN ISOLDE facility and at Brookhaven AGS, the behaviour of a mercury target as a function of various proton beam parameters was analysed. The experimental results allow for extrapolation from the present data by one order of magnitude to the final design of a high power jet target foreseen for a neutrino factory. Observed velocities of the mercury splash were up to 45 m/s. The experimental setup used at the High Magnetic Field Laboratory allowed a successful demonstration of injecting a 12 m/s mercury jet with a diameter d=4 mm into a 20 T solenoidal field. The results of this experiment revealed the magnetohydrodynamic effects, which occur in the free jet and in the supplying mercury circuit, and serve as benchmark for numerical codes. The extrapolation to the nominal parameters of a neutrino factory shows that the concept of a jet target is a valid option. Lettry, Jacques Arnau-Izquierdo, G Benedikt, Michael Catherall, R Cyvoct, G Fabich, A Georg, U Gilardoni, S S Jonsson, O Ravn, H L Sgobba, Stefano Bauer, G Bruchertseifer, H Graber, T Gudermann, C Ni, L Rastani, R Nucl. Instrum. Methods Phys. Res., B 10.1016/S0168-583X(02)01919-5 251-256 204 suppl. 2003 2003 The ISOLDE pulsed proton beam peak power amounts to 500 MW during the 2.4 ms proton pulse. The fraction of the proton pulse energy deposited in the target material is at the origin of severe thermal shocks. Quantitative measurement of their effect on the release of radioelements from ISOLDE targets was obtained by comparison of release profiles measured under different proton beam settings. The thermal shock induced in liquids (Pb, Sn, La) lead to mechanical failure of ISOLDE molten metal target vessels. Failure analysis is presented and discussed in the light of the response of mercury samples submitted to the ISOLDE beam and monitored by high-speed optical systems. McDonald, K T Brown, K A Finfrock, C C Gassner, D M Greene, G A Hanson, A L Kahn, S A King, B J Kirk, H G Ludewig, H Palmer, R B Pendzick, A F Prigl, R Samulyak, R V Scaduto, J Simos, N Thieberger, P Tsang, T Y F Wang, H Weggel, R J Bernadon, A Fabich, A Johnson, C D Lettry, Jacques Ravn, H L Mokhov, N V Zeller, A Beshears, D L Cates, M C Haines, J R Riemer, B W Tsai, C C Fukui, Y 2001 2001 Kirk, H G Brown, K Fernow, R C Finfrock, C C Gassner, D M Greene, G A Kahn, S A King, B J Prigl, R Samulyak, R V Scaduto, J Simos, N Thieberger, P Tsang, T Y F Wang, H Weggel, R J Bernadon, A Fabich, A Lettry, Jacques Ravn, H L Zeller, A Beshears, D L Cates, M R Haines, J R Riemer, B W Spampinato, P T Tsai, J McDonald, K T Fukui, Y 2001 2001 radio-frequency rf breakdown rf cavities x-ray 2003 2003 Blondel, A Buchalla, Gerhard Campanelli, Mario Ellis, Jonathan Richard Giudice, Gian Francesco Gruber, Peter Gómez-Cadenas, Juan José Haseroth, H Hernández, Pilar Kataev, Andrei Kraml, Sabine Mangano, Michelangelo L Mezzetto, Mauro Murray, William J Van der Schaaf, A 10.5170/CERN-2004-002 2004 2004 Gruber, P 2001 2001 Ionisation cooling is one of the main ingredients of a Neutrino Factory -- a high-intensity, high-energy neutrino machine. The cooling channel of the CERN 44/88 MHz baseline design is discussed. A sensitivity study varying various parameters and beam conditions is performed in order to establish critical values. The question of how to compare different cooling scenarios is tackled by defining assessment criteria for the cooling performance. In the last chapter, "FASTCOOL", a small cooling experiment that would allow to observe ionisation cooling for the first time, is proposed. AIP Conf. Proc. 10.1063/1.1524405 229-236 648 2002 2002 At the LHC a beam loss system will be installed for continuous surveillance of particle losses. The system is designed to prevent hardware destructions, to avoid magnet coil quenches and to provide quantitative loss values. Over 3000 ionization chambers will be used to initiate the beam abort if the loss rates exceed the quench levels. The time and beam energy dependent quench levels require the acquisition of chamber currents in the range from 50 pA to 0.5 mA and an update of the values every 89 mu s. The acquisition and control electronics will consist of a front end electronics near (< 400 m) to the ionization chambers and a threshold controller in the surface buildings. The front end will include a charge balance converter, a counter and multiplexer part. The charge balance converter is most suitable to cover the large dynamic range. The introduced error is smaller than few % in the required dynamic range. Six channels will be transmitted over one cable of up to 3 km length. The threshold controller will issue warnings and dump signals depending on the beam energy and the loss durations. (7 refs). Assmann, R W Baishev, I S Brugger, M Bruno, L Burkhardt, H Burtin, G Dehning, Bernd Fischer, C Goddard, B Gschwendtner, E Hayes, M Jeanneret, J B Jung, R Kain, V Kaltchev, D I Lamont, M Schmidt, R Vossenberg, Eugène B Weisse, E Wenninger, J collimation collider proton 2002 2002 The LHC requires efficient collimation during all phases of the beam cycle. Collimation plays important roles in prevention of magnet quenches from regular beam diffusion, detection of abnormal beam loss and subsequent beam abort, radiation protection, and passive protection of the superconducting magnets in case of failures. The different roles of collimation and the high beam power in the LHC impose many challenges for the design of the collimation system. In particular, the collimators must be able to withstand the expected particle losses. The requirements for the LHC collimation system are presented. Gschwendtner, E Dehning, Bernd Ferioli, G Friesenbichler, W Kain, V beam-losses instrumentation monitoring collimation longitudinal-dynamics 2002 2002 At the Large Hadron Collider (LHC) a beam loss system will be installed in the arc, dispersion suppressor and the straight regions for a continuous surveillance of particle losses. These beam particles deposit their energy partially in the super-conducting coils leading to temperature increase, possible magnet quenches and damages. The primary and secondary halo of the beam is absorbed by the collimation system. The tertiary halo will be lost at aperture limits in the ring. Its loss distribution along the magnets has been studies. At the positions, where most of the beam losses are expected, simulations of the particle fluences outside the cryostat and induced by lost protons at the aperture have been performed with the Monte Carlo Code Geant 3.2.1. This allows determining the most suitable positions of the detectors, the needed number of monitors and the impact on the dynamic range of the detectors. The design of the beam loss monitor system is presented that meet the required sensitivity, dynamic range and time resolution. Rossa, E Gschwendtner, E Placidi, Massimo Schmickler, Hermann Brambilla, A Mongellaz, F Verger, L Cindro, V Mikuz, M Moritz, P 2002 2002 Beam diagnostics in future high-energy accelerators will require long lived instrumentation in highly hostile radiation environments. A research program aiming at individuating new solutions and testing them under extreme operational conditions has been launched at CERN in the framework of developments for the LHC instrumentation. Its outcome might be used in future accelerator projects, in industry or in physics applications. The detectors which will be adopted for the LHC luminosity monitoring and optimization will be installed close to or inside copper absorbers specifically designed for radiation protection of the accelerator magnetic elements in the interaction regions. These detectors will have to withstand extreme radiation levels and their long-term operation has to be assured without requiring human intervention. Polycrystalline-CdTe detectors have demonstrated their radiation hardness against extreme doses of X-ray exposure in the LEP collider and are considered as good candidates for LHC luminosity monitoring applications. After recalling a series of measurements obtained on CdTe samples exposed to different sources to study their time response and sensitivity we present results on their performance after irradiation at doses of 10^16 neutrons/cm^2. This is a preliminary step in the program intended to test the samples during and after irradiation up to levels of 10^18 neutrons/cm^2 and 10^16 protons/cm^2 comparable to those anticipated at the detector locations over ten years of operation of the accelerator. Gschwendtner, E 2000 2000 The experiments for the Large Hadron Collider LHC at CERN have to work for 15 years in the presence of a very high particle background of photons in the energy range from 100\,keV to 10\,MeV and neutrons in the range from thermal energies ($\approx 0.025\,$eV) to 20\,MeV. \\ The background is so high that it becomes a major design criterion for the ATLAS ex\-peri\-ment, a general purpose experiment at LHC that will be operational in the year 2005. The exact level of this background is poorly known. At present an uncertainty factor of five has to be assumed to which the limited knowledge of the shower processes in the absorber material and the ensueing neutron and photon production is estimated to contribute with a factor 2.5. \\ So far, the background has been assessed only through extensive Monte Carlo evaluation with the particle transport code FLUKA. The lack of relevant measurements, which were not done up to now, are to a large extent responsible for this uncertainty. Hence it is essential to benchmark the background predictions with measurements in order to reduce the uncertainties resulting from the shower processes. This work describes in detail the benchmarking measurements and analysis of these backgrounds in an experimental arrangement that approaches rather closely the layout and shielding in the ATLAS detector. The absolute yield and energy of the particles ema\-nating from the final stages of the hadronic shower were measured using a Bi$_4$Ge$_3$O$_{12}$ detector. \\ In this study particular care was taken to guard against spurious effects, which could mask the measurements of the photon background. Typically we expect to measure a photon per $10^4$ incident hadrons which is equivalent to a reduction factor in energy of $\approx 10^8$. At first, calibration measurements with well known radioactive sources were carried out in order to evaluate the response to photons and neutrons of the used detector. The photon results show excellent agreement with the simulations, while the neutrons show some FLUKA specific discrepancies that are however well understood. The actual benchmarking task comprised measurements with different beam intensities and momenta, different positions and absorber thicknesses in order to reduce systematic effects and assess residual activities from other sources. \\ The careful analysis of the measurements including a detailed evaluation of the systematic uncertainties provides a good understanding of all effects due to residual activities, dead-time corrections and other rate effects of the set-up. Comparing the measurements with detailed FLUKA simulations shows that under all different measurement conditions the agreement is on the 20\,\% level. These studies also give answer to the nature of the particles emanating from the absorber. \\ Finally a method to obtain the measured photon rates and energies from the total measured and simulated numbers was developed. The comparison of the measurements with the FLUKA calculations can hence be used to reduce the uncertainties resulting from the shower processes, so that the background simulations can predict the ATLAS background with higher reliability. Vincke, H H Gschwendtner, E Fabjan, Christian Wolfgang Otto, T 2001 2001 Gschwendtner, Edda Vincke, Helmut H Fabjan, Christian Wolfgang Hessey, N P Otto, Thomas Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(01)01683-7 573-580 482 3 Fluka benchmark, LHC Experiments, Photon and neutron background 2002 2002 Background benchmarking measurements have been made to check the low-energy processes which will contribute via nuclear reactions to the radiation background in the LHC experiments at CERN. Previously these processes were only evaluated with Monte Carlo simulations, estimated to be reliable within an uncertainty factor of 2.5. Measurements were carried out in an experimental set-up comparable to the shielding of ATLAS, one of the general-purpose experiments at LHC. The absolute yield and spectral measurements of photons and neutrons emanating from the final stages of the hadronic showers were made with a Bi_4Ge_3O_{12} (BGO) detector. The particle transport code FLUKA was used for detailed simulations. Comparison between measurements and simulations show that they agree within 20% and hence the uncertainty factor resulting from the shower processes can be reduced to a factor of 1.2. Drees, A Ahrens, L Fliller, R P Fu, W Heppner, G Kain, V bunching collider collimation diagnostics 2003 2003 Schmidt, R Calvi, M Kain, V Siemko, A 2004 2004 Schmidt, R Assmann, R W Kain, V beam-losses collimation 2002 2002 Kroyer, T 2003 2003 The feasibility of a waveguide mode reflectometer for the LHC beam-pipe has been studied. After a start-up phase devoted to getting some experience with network analysers and waveguide calibration, the most important electrical characteristics of the beam-pipe between 4 and 8 GHz have been determined in a resonator measurement. The interconnects were also examined thoroughly, for they may pose a significant problem for the reflectometer's operation. In the next step digital signal processing was applied to process the measurement data that is affected by various effects, especially dispersion. Some effects were closely examined in measurement and simulation. Finally the performance of the method was tested on the 50 m test track. Kuntner, C 2003 2003 In the study of new pharmaceuticals as well as brain and genetic research, Positron Emission Tomography (PET) is a useful method. It has also recently entered the clinical domain in cardiology and particularly in oncology. Small animals such as mice, are often used to validate sophisticated models of human disease. High spatial resolution PET instrumentation is therefore necessary due to the reduced dimensions of the organs. Inorganic scintillators are employed in most of the diagnostic imaging devices. The ultimate performance of the PET scanner is tightly bound to the scintillation properties of the crystals. In the last years there has been an effort to develop new scintillating materials characterized by high light output, high detection efficiency and fast decay time. The most studied systems are mainly Ce3+-doped crystals such as LSO:Ce, YAP:Ce, LuAP:Ce, and recently also mixed Lux(RE3+)1-xAlO3:Ce crystals. These crystals are very attractive for medical application because of their high density (with the exception of YAP:Ce), short decay time, and high light output. This work deals with the development of cerium doped LuYAP crystals, with varying amount of yttrium, for application in several small animal PET scanners. In addition the scintillation properties and mechanism of lutetium based oxyorthosilicates are investigated. The results in light yield, energy resolution and decay time are presented for all the studied compounds. The light yield non-proportionality on photon energy was studied as well as the intrinsic energy resolution. Optical characteristics such as excitation, emission and absorption spectra were measured and important correlations with the scintillation properties are pointed out. Phoswich detectors are currently being considered by a number of investigators for depth of interaction (DOI) measurements in PET. The Crystal Clear Collaboration plans to construct several small animal PET scanners using LuYAP and LSO crystals. The identification of the layer of interaction is done using the pulse shape of the corresponding scintillator material. First results on the combination of LuYAP:Ce crystals with LSO:Ce crystals in phoswich geometry for the final PET scanner are presented. The experimental results show that the new DOI technique is applicable for high-resolution PET systems. Kuntner, C Auffray, Etiennette Lecoq, P Pizzolotto, C Schneegans, M Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(02)01559-0 131-136 493 3 2002 2002 Light output and energy resolution for a 2*2*10 mm/sup 3/ LuYAP:Ce crystal coupled to a XP2020Q photomultiplier were studied. The measured light output of 8530 photons/MeV includes the correction for the quantum efficiency of the XP2020Q photomultiplier. An energy resolution of 7.33% was obtained for 662 keV gamma -rays with a long face coupled to the PMT. The measured number of 2130 phe/MeV implies a photoelectron statistical contribution of 6.59% and hence a LuYAP intrinsic energy resolution of 3.21%. The relative light output of the LuYAP scintillator measured for photon energies varying from 31 keV to 1.333 MeV was constant within 7%. These observations are consistent with results for the YAP:Ce scintillator, and with the assumption that there is a direct correlation between the energy resolution of scintillators and non-proportionality of their light output versus energy in the low-energy domain. The results are compared to the relative light output of the LSO:Ce scintillator measured for varying energies. (17 refs). Arce, P Banerjee, S Boccali, T Case, M de Roeck, A Lara, V Liendl, M Nikitenko, A N Schröder, M Strässner, A Wellisch, H P Wenzel, H Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(03)00544-8 687-688 502 2003 2003 Currently CMS event simulation is based on GEANT3 while the detector description is built from different sources for simulation and reconstruction. A new simulation framework based on GEANT4 is under development. A full description of the detector is available, and the tuning of the GEANT4 performance and the checking of the ability of the physics processes to describe the detector response is ongoing. Its integration on the CMS mass production system and GRID is also currently under development. The Detector Description Database project aims at providing a common source of information for Simulation, Reconstruction, Analysis, and Visualisation, while allowing for different representations as well as specific information for each application. A functional prototype, based on XML, is already released. Also examples of the integration of DDD in the GEANT4 simulation and in the reconstruction applications are provided. Liendl, M 2000 2000 Bearden, I.G. Boggild, H. Boissevain, J. Christiansen, P.H.L. Conin, L. Dodd, J. Erazmus, B. Esumi, S. Fabjan, C.W. Ferenc, D. Fields, D.E. Franz, A. Gaardhoje, J.J. Hamelin, M. Hansen, A.G. Hansen, O. Hardtke, D. van Hecke, H. Holzer, E.B. Humanic, T.J. Hummel, P. Jacak, B.V. Kaimi, K. Kaneta, M. Kohama, T. Kopytine, M. Leltchouk, M. Ljubicic, A., Jr. Lorstad, B. Maeda, N. Malina, R. Martin, L. Medvedev, A. Murray, M. Ohnishi, H. Paic, G. Pandey, S.U. Piuz, F. Pluta, J. Polychronakos, V. Potekhin, M. Poulard, G. Reichhold, D. Sakaguchi, A. Schmidt-Sorensen, J. Simon-Gillo, J. Sondheim, W. Spegel, M. Sugitate, T. Sullivan, J.P. Sumi, Y. Willis, W.J. Wolf, K.L. Xu, N. Zachary, D.S. Phys. Rev. C 10.1103/PhysRevC.66.044907 44907-1-9 66 4 Pb Pb X central collisions particle production relativistic heavy ion collisions 2002 2002 The NA44 experiment has measured single-particle inclusive spectra for charged pions, kaons, and protons as a function of transverse mass near midrapidity in 158A GeV/c Pb+Pb collisions. From the particle mass dependence of the observed m/sub T/ distributions, we are able to deduce a value of about 120 MeV for the temperature at thermal freeze-out. From the observed ratios of the rapidity densities, we find values of the chemical potentials for light and strange quarks and a chemical freeze-out temperature of approximately 140 MeV. (34 refs). Humanic, T J Bearden, I G Bøggild, H Boissevain, J G Dodd, J Erazmus, B Esumi, S C Fabjan, Christian Wolfgang Ferenc, D Fields, D E Franz, A Gaardhøje, J J Hamelin, M Hansen, A G Hansen, O Hardtke, D van Hecke, H Holzer, E B Humanic, T J Hummel, P Jacak, B V Jayanti, R Kaimi, K Kaneta, M Kohama, T Kopytine, M L Leltchouk, M Ljubicic, A Lörstad, B Maeda, N Malina, R Medvedev, A Murray, M Ohnishi, H Paic, G Pandey, S U Piuz, François Pluta, J Polychronakos, V Potekhin, M V Poulard, G Reichhold, D M Sakaguchi, A Simon-Gillo, J Schmidt-Sørensen, J Sondheim, W E Spegel, M Sugitate, T Sullivan, J P Sumi, Y Willis, W J Wolf, K L Xu, N Zachary, D S 2000 2000 Recent results for both single particle spectra and two particle interferometry from CERN experiment NA44 are presented. Experiment NA44 is a focussing spectrometer with both excellent momentum resolution and particle identification. The results shown are mainly from 158 GeV/nucleon Pb+Pb running. These include single pion, kaon, proton, antiproton, deuteron, and triton spectra and two pion, two kaon and two proton correlation functions. (15 refs). Hardtke, D Bearden, I G Bøggild, H Boissevain, J G Dodd, J Erazmus, B Esumi, S C Fabjan, Christian Wolfgang Ferenc, D Fields, D E Franz, A Gaardhøje, J J Hamelin, M Hansen, A G Hansen, O Hardtke, D van Hecke, H Holzer, E B Humanic, T J Hummel, P Jacak, B V Jayanti, R Kaimi, K Kanata, M Kohama, T Kopytine, M L Leltchouk, M Ljubicic, A Lörstad, B Maeda, N Malina, R Medvedev, A Murray, M Ohnishi, H Paic, G Pandey, S U Piuz, François Pluta, J Polychronakos, V Potekhin, M V Poulard, G Reichhold, D M Sakaguchi, A Simon-Gillo, J Schmidt-Sørensen, J Sondheim, W E Spegel, M Sugitate, T Sullivan, J P Sumi, Y Willis, W J Wolf, K L Xu, N Zachary, D S 1999 1999 NA44 is a focusing spectrometer at the CERN SPS that measures single- particle inclusive spectra and two-particle correlations near mid- rapidity. Recent data taken using a 158 GeV/nucleon Pb beam incident on a Pb target will be presented. These data will be compared to data taken using other projectile-target combinations. The data show that the emission volume in Pb+Pb collisions is larger than in lighter projectile-target systems, that a large degree of collective radial flow is created in these collisions, and that different particle species probe different regions of the freeze-out volume. (22 refs). Cattai, A Malina, R AIP Conf. Proc. 10.1063/1.1361770 324-328 536 2000 2000 Microstrip Gas Chambers (MSGC's), Small Gap and Groove detectors with an optional GEM foil are a recent development of gaseous micro- pattern detectors providing a cost efficient solution for a tracking detector. They provide good spatial resolution (~35 mu m) and can operate in high radiation environments (up to ~10/sup 4/ particles/mm /sup 2/). The laboratory course on micro pattern detectors tried to give an understanding of the layout and basic functioning of these detectors. (6 refs). Kopytine, M L Bearden, I G Bøggild, H Boissevain, J G Dodd, J Erazmus, B Esumi, S C Fabjan, Christian Wolfgang Ferenc, D Fields, D E Franz, A Gaardhøje, J J Hamelin, M Hansen, A G Hansen, O Hardtke, D van Hecke, H Holzer, E B Humanic, T J Hummel, P Jacak, B V Jayanti, R Kaimi, K Kaneta, M Leltchouk, M Ljubicic, A Lörstad, B Maeda, N Malina, R Medvedev, A Murray, M Ohnishi, H Paic, G Pandey, S U Piuz, François Pluta, J Polychronakos, V Potekhin, M V Poulard, G Reichhold, D M Sakaguchi, A Schmidt-Sørensen, J Simon-Gillo, J Sondheim, W E Spegel, M Sugitate, T Sullivan, J P Sumi, Y Willis, W J Wolf, K L Xu, N Zachary, D S 1999 1999 Mayer, Sabine Otto, T Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(03)01107-0 399-402 505 2003 2003 A comparison of two types of dose equivalent meters, a recombination chamber REM-2 and a tissue-equivalent proportional counter (TEPC) Homburg Area Neutron DosImeter (HANDI), were carried out at the CERN- EC high-energy reference field facility, CERF, in October 2001. Here, the mixed high-energy radiation field in commercial flight altitudes can be simulated with dose rates up to 2 orders of magnitude higher. The total absorbed dose and the dose equivalent have been measured at different radiation field intensities. Of particular interest for measuring in the CERF field is the assessment of the low LET- component, i.e. the gamma and muon components of the field, which are not taken into account by existing Monte Carlo simulations modeling the radiation field. The new results for the estimation of the low LET-component are compared with previous ones delivered by REM-2 at CERF. The results show good agreement between the REM-2 chamber and the HANDI. Mayer, S 2003 2003 Measurements of ambient dose equivalent in stray radiation fields behind the shielding of high-energy accelerators are a challenging task. Several radiation components (photons, neutrons, charged particles, muons, etc.), spanning a wide range of energies, contribute to the total dose equivalent. The radiation fields are produced by beam losses interacting with structural material during the acceleration or at the ejection to experimental areas or other accelerators. The particle beam is usually not continuous but separated in "bunches" or pulses, which further complicates dose measurements at high-energy accelerators. An ideal dosimeter for operational radiation protection should measure dose equivalent for any composition of radiation components in the entire energy range even when the field is strongly pulsed. The objective of this work was to find out if an ionisation chamber operated as a "recombination chamber" and a TEPC instrument using the variance-covariance method ("Sievert Instrument") are capable of assessing the ambient dose equivalent in radiation fields with short pulses. The results are compared to those of a conventional TEPC instrument (HANDI-TEPC) and to the total dose equivalent values obtained from the suitable combination of readings from instruments currently used at CERN. These instruments are a combination of several detectors with different characteristics measuring individual dose fractions (i.e. an argon-filled chamber, a hydrogen-filled chamber and a rem ionisation chamber). The HANDI-TEPC is usually the preferred reference instrument in mixed radiation fields of unknown composition at CERN, but in strongly pulsed fields it fails because of pile-up effects. Although the mixed stray radiation fields differ strongly from those applied in standard calibration, the first step in using a radiation protection instrument is the intensive study and characterisation of the detector behaviour in reference fields of calibration sources. This forms the basis for improving the reliability and accuracy of measurements in unknown radiation fields. The next step is to test the detectors in mixed reference fields, which simulate workplace fields but are produced under laboratory conditions. At CERN, an opportunity for such a reference field is realized by the CERF-field (CERN-EU high-energy reference field). The field provides a mixed field of mainly neutrons ranging from thermal energies up to hundreds of GeV accompanied by photons and muons. At CERF the HANDI-TEPC was known to be suitable to be used as a reference instrument for the total dose equivalent. For this reason the results of the recombination chamber and Sievert Instrument were compared to those of the HANDI-TEPC for several reference locations and different beam intensities. In particular, the background radiation at CERF was studied, which has a non-negligible influence on the total dose equivalent and is strongly dependent on the reference location. At CERF, a very good agreement between the instruments was found. Finally the instruments were investigated in an unknown mixed stray radiation field with short pulses on the "PS-bridge". This PS-bridge is a location where 260 cm of concrete shield the beam line of the PS accelerator. The operation of the PS at CERN is composed of a supercycle of 16.8 s divided in 14 cycles of 1.2 s each. The duration of the particle pulse can be as short as 10 µs. In such a field the HANDI-TEPC was not able to resolve the single events within one particle pulse because of pile-up effects. The recombination chamber and the Sievert Instrument, however, appear to be capable of assessing the total dose equivalent correctly provided that the response is interpreted carefully by using appropriate corrections and calibration factors. Tlustos, L Campbell, M Davidson, D Heijne, Erik H M Mikulec, B Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(03)01557-2 102-108 509 2003 2003 Dopant fluctuations and other defects in silicon wafers can lead to systematic errors in several parameters in particle or single-photon detection. In imaging applications non-uniformities in sensors or readout give rise to fixed pattern image noise and degradation of achievable spatial resolution for a given flux. High granularity pixel detectors offer the possibility to investigate local properties of the detector material on a microscopic scale. In this paper, we study fixed pattern detection fluctuations and detector inhomogeneities using the Medipix 1 readout chip. Low-frequency fixed pattern signal deviations due to dopant inhomogeneities can be separated from high-frequency deviations. Watt, J Bates, R Campbell, M Mathieson, K Mikulec, B O'Shea, V Passmore, M S Schwarz, C Smith, K M Whitehill, C Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(00)01112-8 185-90 460 1 2001 2001 Hybrid semiconductor pixel detectors are being investigated as imaging devices for radiography and synchrotron radiation beam applications. Based on previous work in the CERN RD19 and the UK IMPACT collaborations, a photon counting GaAs pixel detector (PCD) has been used in an X-ray powder diffraction experiment. The device consists of a 200 mu m thick SI-LEC GaAs detector patterned in a 64*64 array of 170 mu m pitch square pixels, bump-bonded to readout electronics operating in single photon counting mode. Intensity peaks in the powder diffraction pattern of KNbO/sub 3/ have been resolved and compared with results using the standard scintillator, and a PCD predecessor (the Omega 3). The PCD shows improved speed, dynamic range, 2-D information and comparable spatial resolution to the standard scintillator based systems. It also overcomes the severe dead time limitations of the Omega 3 by using a shutter based acquisition mode. A brief demonstration of the possibilities of the system for dental radiography and image processing are given, showing a marked reduction in patient dose and dead time compared with film. (7 refs). Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(99)01448-5 48 449 1-2 2000 2000 We report on the first operation of a hybrid photon detector prototype with integrated silicon pixel readout for the ring imaging Cherenkov detectors of the LHCb experiment. The photon detector is based on a cross-focussed image intensifier tube geometry where the image is de-magnified by a factor of 4. The anode consists of a silicon pixel array, bump-bonded to a binary readout chip with matching pixel electronics. The prototype has been characterized using a low-intensity light-emitting diode operated in pulsed mode. Its performance in terms of single-photoelectron detection efficiency and imaging properties is presented. A model of photoelectron detection is proposed, and is shown to be in good agreement with the experimental data. It includes an estimate of the charge signal generated in the silicon detector, and the combined effects of the comparator threshold spread of the pixel readout chip, charge sharing at the pixel boundaries and back-scattering of the photoelectrons at the silicon detector surface. Mitaroff, Angela Silari, Marco Radiat. Prot. Dosim. 7-22 102 1 2002 2002 A reference facility for the calibration and intercomparison of active and passive detectors in broad neutron fields has been available at CERN since 1992. A positively charged hadron beam (a mixture of protons and pions) with momentum of 120 GeV/c hits a copper target, 50 cm thick and 7 cut in diameter. The secondary particles produced in the interaction traverse a shield, at 90 degrees with respect to the direction of the incoming beam, made of either 80 to 160 cm of concrete or 40 cm of iron. Behind the iron shield, the resulting neutron spectrum has a maximum at about 1 MeV, with an additional high-energy component. Behind the 80 cm concrete shield, the neutron spectrum has a second pronounced maximum at about 70 MeV and resembles the high-energy component of the radiation field created by cosmic rays at commercial flight altitudes. This paper describes the facility, reports on the latest neutron spectral measurements, gives an overview of the most important experiments performed by the various collaborating institutions over recent years and briefly addresses the possible application of the facility to measurements related to the space programme. (87 refs). Silari, Marco Agosteo, S Birattari, C Foglio-Para, A Gini, L Mitaroff, Angela Ulrici, L Nucl. Instrum. Methods Phys. Res., B 10.1016/S0168-583X(02)01036-4 399-408 194 4 2002 2002 The neutron emission from 5, 10 and 20 mm thick lead and 10 and 20 mm thick copper targets bombarded by a lead ion beam with momentum of 158 GeV/c per nucleon were measured at the CERN Super Proton Synchrotron. The neutron yield and spectral fluence per incident ion on target were measured with an extended range Bonner sphere spectrometer in the angular range 30-135 degree with respect to beam direction. Monte Carlo simulations with the FLUKA code were performed to establish a guess spectrum for the unfolding of the experimental data. The results have shown that, lacking Monte Carlo radiation transport codes dealing with ions with masses larger than 1 amu, a reasonable prediction can be carried out by scaling the result of a Monte Carlo calculation for protons by the projectile mass number to the power of 0.85-0.95 for a lead target and 0.88-1.03 for a copper target. Mitaroff, Angela 2001 2001 Stray radiation fields outside the shielding of hadron accelerators are of complex nature. They consist of a multiplicity of radiation components (neutrons, photons, electrons, pions, muons, ...) which extend over a wide range of energies. Since the dose equivalent in these mixed fields is mainly due to neutrons, neutron dosimetry is a particularly important task. The neutron energy in these fields ranges from thermal up to several hundreds of MeV, thus making dosimetry difficult. A well known instrument for measuring neutron energy distributions from thermal energies up to about E=10 MeV is the Bonner sphere spectrometer (BSS). It consists of a set of moderating spheres of different radii made of polyethylene, with a thermal neutron counter in the centre. Each detector (sphere plus counter) has a maximum response at a certain energy value depending on its size, but the overall response of the conventional BSS drops sharply between E=10-20 MeV. This thesis focuses on the development, the calibration and tests in various radiation fields of a new Bonner sphere spectrometer with an extended response function. First, two new Bonner spheres with a response up to E=2 GeV were developed and built as a complement to a conventional BSS. This was achieved by an extensive Monte-Carlo (MC) simulation study performed with FLUKA on possible moderating materials and combinations of these materials. In this study particular care was taken to reliably estimate the uncertainties on the calculated response functions due to variations of the sphere diameter, the moderator density and the moderator thickness. MC simulations also pointed out that the old sphere supports made of plastics increase the neutron scattering and may therefore influence the count rate of the Bonner spheres. Thus, new sphere supports made of aluminium were designed and constructed. The two new spheres were assembled with the conventional BSS into a new extended-range spectrometer. The new spectrometer was then calibrated at the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig, Germany, using monoenergetic neutron beams of E=144 keV, 1.2 MeV, 5 MeV and 14.8 MeV. In the following it was also tested with an 241Am-Be source in the CERN calibration laboratory and at CERF (CERN-EU high-energy reference field). The CERF facility is very well characterized and provides a broad neutron field from thermal energies up to several hundreds of MeV with a large relative contribution of 10-100 MeV neutrons. The tests in both fields showed that the simulations agreed with the measured values to an accuracy of better than 20%. This is perfectly adequate for the use in radiation protection. In fact, the extended-range Bonner sphere spectrometer has not only demonstrated its advantages in routine measurements in this domain, but was also successfully employed in research work related to radiation protection. Thereby the superior performance of the new extended-range BSS as compared to the conventional one became clearly visible. In addition to the work on the Bonner sphere spectrometer, preliminary Monte-Carlo studies aiming at an upgrade of CERF were performed in this thesis. It was shown that an optimized shielding configuration at CERF could produce a radiation field with higher intensities, higher energies and a higher relative neutron fluence as compared to the present set-up. This new reference field is of interest for forthcoming measurements related to the space programme and also for testing and calibrating the Bonner spheres at energies higher than what was possible in this thesis. Ferrari, A Mitaroff, Angela Silari, Marco Physica Medica, Suppl. 115-18 17 1 2001 2001 A reference facility for the intercomparison of active and passive detectors in high-energy neutron fields is available at CERN since 1993. A positive charged hadron beam (a mixture of protons and pions) with momentum of 120 GeV/c hits a copper target, 50 cm thick and 7 cm in diameter. The secondary particles produced in the interaction are filtered by a shielding of either 80 cm of concrete or 40 cm of iron. Behind the iron shielding, the resulting neutron spectrum has a maximum at about 1 MeV, with an additional high-energy component. Behind the concrete shielding, the neutron spectrum has a pronounced maximum at about 70 MeV and resembles the high-energy component of the radiation field created by cosmic rays at commercial flight altitudes. The facility is used for a variety of investigations with active and passive neutron dosimeters. Its use for measurements related to the space programme is discussed. (21 refs). Ferrari, A Mitaroff, Angela Silari, Marco AIP Conf. Proc. 10.1063/1.1395398 671-674 576 2001 2001 A reference facility for the inter-comparison of active and passive detectors in complex high-energy neutron fields is available at CERN since 1993. A positively charged hadron beam (a mixture of protons and pions) with momentum of 120 GeV/c hits a copper target, 50 cm thick and 7 cm in diameter. The secondary particles produced in the interaction traverse a shield made of either 80 cm of concrete or 40 cm of iron. Behind the iron shield, the resulting neutron spectrum has a maximum at about 1 MeV, with an additional high-energy component. Behind the concrete shield, the neutron spectrum has a second pronounced maximum at about 70 MeV and resembles the high- energy component of the radiation field at commercial flight altitudes created by cosmic rays. Recent Monte Carlo calculations are presented, performed for different beam conditions and shielding configurations in view of a possible upgrade of the facility for measurements related to the space program. (20 refs). Epp, B. Ghete, V.M. Nairz, A. eConf C WG205 0304052 2003 2003 The prospects for the measurement of $B_{s}^{0}$ oscillations with the ATLAS detector at the Large Hadron Collider are presented. $B_{s}^{0}$ candidates in the $D_{s}^{-} pi^{+}$ and $D_{s}^{-} a_{1}^{+}$ decay modes from semileptonic events were fully simulated and reconstructed, using a detailed detector description. The sensitivity and the expected accuracy for the measurement of the oscillation frequency were derived from unbinned maximum likelihood amplitude fits as functions of the integrated luminosity. A detailed treatment of the systematic uncertainties was performed. The dependence of the measurement sensitivity on various parameters was also evaluated. Radu, A Baines, J T M Baratella, A Caron, B Davis, R A Di Mattia, S Elsing, M Epp, B Falciano, S Ghete, V M González-Pineiro, B George, S González, S Hauser, R Hutchcroft, D E Hansl-Kozanecka, Traudl Wei Dong Li Mommsen, R K Morettini, P Nairz, A Nikitin, N V Negri, A Nisati, A Pinfold, James L Parodi, F Polesello, G Si Jin Qian Rizatdinova, F K Robins, S Shank, J T Slowe, C Sherwood, P Smizanska, M Shears, T G Sessler, M Sivoklokov, S Yu Scannicchio, D A Tapprogge, Stefan Vercesi, V Wielers, M Wicke, D Wiedenmann, W IEEE Trans. Nucl. Sci. 10.1109/TNS.2002.1003741 377-82 49 2 pt.1 2002 2002 The trigger and data-acquisition system of ATLAS, a general-purpose experiment at the Large Hadron Collider (LHC), will be based on three levels of online selection. Starting from the bunch-crossing rate of 40 MHz (an interaction rate of 1 GHz at design luminosity-~ 10/sup 34 / cm/sup -2/s/sup -1/), the first level trigger (LVL1) will reduce the rate to about 75 kHz using purpose-built hardware. An additional factor of about 10/sup 3/ in rate reduction is to be provided by the high-level triggers (HLTs) system, with two main functional components: the second-level trigger (LVL2) and the event filter(EF). LVL2 has to provide a fast decision (guided by the information from LVL1), using only a fraction of the full event, however, already at full granularity and can combine all subdetectors. At the EF, a refined selection is made with the. capability of full event reconstruction and the use of detailed calibration and alignment parameters. The HLT software architecture will provide a common and rather "lightweight" framework, able to execute the various selection algorithms and to control the sequence of execution according to the event properties and configuration parameters. System flexibility is a strong requirement in order to adapt to changes, e.g., in luminosity and background conditions. This paper will present the approach chosen for the software design of the HLT selection framework and of the algorithm interface, giving examples for selection sequences and algorithms. Based on currently existing prototypes, results for both the expected physics (signal efficiency, background rejection) and system (execution time) performance will also be shown. (10 refs). Epp, B Ghete, V M Nairz, A EPJ Direct 10.1007/s1010502cn003 N3 4 BPHYS ATLAS B-Physics Bs Oscillations 2002 2002 The capabilities of the ATLAS detector to measure the ${s}^{0}$ oscillations in proton-proton interactions at the Large Hadron Collider were evaluated. $B_{s}^{0}$ candidates in the $D_{s}^{-} \pi^{+}$ and D_{s}^{-} a_{1}^{+}$ decay modes from semileptonic exclusive events were fully simulated and reconstructed, using a detailed detector description. The sensitivity and the expected accuracy for the from unbinned maximum likelihood amplitude fits as functions of the integrated luminosity. A detailed treatment of the systematic uncertainties was performed. The dependence of the measurement sensitivity on various parameters was also evaluated. Bellunato, T F Braem, André Buzykaev, A R Calvi, M Chesi, Enrico Guido Danilyuk, A F Easo, S Jolly, S Joram, C Kravchenko, E A Liko, D Matteuzzi, C Musy, M Negri, P Neufeld, N Onuchin, A P Séguinot, Jacques Wotton, S Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(03)00780-0 290-293 504 2003 2003 We report on the results obtained using thick samples of silica aerogel as radiators for a Ring Imaging Cherenkov counter. Four large-diameter hybrid photodiodes with 2048 channels have been used as photon detectors. Pions and protons with momenta ranging from 6 to 10 GeV/c were separated and identified. The number of photoelectrons and the radius of the Cherenkov rings together with the Cherenkov angle resolution were measured. A comparison with a simulation program based on GEANT4 is discussed. Dufey, J P Jost, B Neufeld, N Zuin, M 2001 2001 LHCb is an experiment being constructed at CERN's LHC accelerator for the purpose of studying precisely the CP violation parameters in the B-B system. Triggering poses special problems since the interesting events containing B-mesons are immersed in a large background of inelastic p-p reactions. Therefore, a 4 Level Triggering scheme (Level 0 to Level 3) has been implemented. Powerful embedded processors, used in modern intelligent Network Interface Cards (smart NICs), make it attractive to use them to handle the event building protocol in the high-speed data acquisition system of the LHCb experiment. The implementation of an event building algorithm developed for a specific Gigabit Ethernet NIC is presented and performance data are discussed. 5 Refs. Alemi, M Bellunato, T F Braem, André Calvi, M Chesi, Enrico Guido Joram, C Liko, D Matteuzzi, C Negri, P Neufeld, N Paganoni, M Séguinot, Jacques Voillat, D Weilhammer, Peter Ypsilantis, Thomas 2000 2000 We present the results obtained by exposing samples of silica aerogel of different thickness and optical properties to pion and proton beams with momenta between 6 and 10 GeV/c in the PS testbeam facility at CERN. Two large diameter pad-HPDs with 2048 channels, produced at CERN, have been used as photon detectors. Separate Cherenkov rings produced by the different particles were reconstructed obtaining pion /proton separation on the whole considered momentum range. The number of photoelectrons was measured as a function of aerogel thickness and was found in agreement with Monte Carlo expectations. 5 Refs. Alemi, M Bellunato, T F Braem, André Calvi, M Chesi, Enrico Guido Duane, A Joram, C Liko, D Matteuzzi, C Negri, P Neufeld, N Paganoni, M Séguinot, Jacques Voillat, D Wotton, S A Ypsilantis, Thomas Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(01)01826-5 348-52 478 1-2 2002 2002 Alemi, M Bellunato, T F Braem, André Calvi, M Chesi, Enrico Guido Joram, C Liko, D Matteuzzi, C Negri, P Neufeld, N Paganoni, M Séguinot, Jacques Voillat, D Weilhammer, Peter Ypsilantis, Thomas IEEE Trans. Nucl. Sci. 10.1109/23.958763 1265-9 48 4 pt.1 2001 2001 We present the results obtained by exposing samples of silica aerogel of different thickness and optical properties to pion and proton beams with momenta between 6 and 10 GeV/c in the PS testbeam facility at CERN. Two large diameter pad hybrid photodiodes with 2048 channels, produced at CERN, have been used as photon detectors. Separate Cherenkov rings produced by the different particles were reconstructed obtaining pion/proton separation over the whole momentum range. The number of photoelectrons was measured as a function of aerogel thickness and was found to be in agreement with Monte Carlo expectations. (5 refs). Bediaga, I Barbosa-Ademarlaudo, F Cernicchiaro, G Correa de Oliveira, E Magnin, J Marques de Miranda, J Massafferri, A Reis, A Silva, R Amato, S Colrain, P Da Silva, T De Mello-Neto, J R T De Paula, L S Gandelman, M Lopes, J H Maréchal, B Moraes, D Polycarpo, E Vinci do Santos, F Ajaltouni, Ziad J Böhner, G Breton, V Cornat, R Deschamps, O Henrard, P Lecoq, J Perret, P Rimbault, C Trouilleau, C Aslanides, E Cachemiche, J P Duval, P Y Le Gac, R Leroy, O Liotard, P L Menouni, M Potheau, R Tsaregorodtsev, A Yu Tsaregorodtsev, A Yu Boget, D De Bonis, I Décamp, D Dumont-Dayot, N Fouque, N Gourgerot, M Minard, M N Pietrzyk, B Barrand, G Beigbeder-Beau, C Breton, D Callot, O Cros, P D'Almagne, B Delcourt, B Fulda-Quenzer, F Jacholkowska, A Jean-Marie, B Lefrançois, J Machefert, F P Tocut, V Truong, K D Schwierz, R Spaan, B Bauer, C Baumeister, D Bulian, N Fuchs, H Glebe, T Hofmann, W Knöpfle, K T Löchner, S Ludwig, A Sánchez-Nieto, F Schmelling, M Schwingenheuer, B Bachmann, S Bock, P Deppe, H Eisele, Franz Feuerstack-Raible, M Henneberger, S Igo-Kemenes, P Rusnyak, R Stange, U Trunk, U Walter, M Wiedner, D Uwer, U Lindenstruth, V Richter, R Schulz, M W Walsch, A Bencivenni, G Bloise, C Bossi, F Campana, P Capon, G De Simone, P Forti, C Franceschi, M A Murtas, F Passalacqua, L Patera, V Sciubba, A Bargiotti, M Bertin, A Bruschi, M Capponi, M D'Antone, I De Castro, S Faccioli, P Fabbri, L Galli, D Giacobbe, B Marconi, U Massa, I Piccinini, M Poli, M Semprini-Cesari, N Spighi, R Vagnoni, V M Vecchi, S Villa, M Vitale, A Zoccoli, A Cadeddu, S Cardini, A Caria, M Lai, A Pinci, D Saitta, B Carassiti, V Cotta-Ramusino, A Gianoli, A Martini, M Petrucci, F Savrié, M Bizzeti, A Calvetti, M Collazuol, G Iacopini, E Lenti, M Martelli, F Passaleva, G Veltri, M Cuneo, S Fontanelli, F Gracco, V Musico, P Petrolini, A Sannino, M Alemi, M Bellunato, T Calvi, M Matteuzzi, C Musy, M Negri, P Paganoni, M Auriemma, G Bocci, V Bosio, V Fidanza, D Frenkel, A Harrison, K Martellotti, G Martínez, S Penso, G Petrarca, S Pirozzi, G Santacesaria, R Satriano, C Satta, A Carboni, G Dominici, Daniele Ganis, G Messi, R Pacciani, L Paoluzi, L Santovetti, E van Apeldoorn, G Van Bakel, N Bauer, T S Van den Brand, J F J Bulten, H J Cârloganu, C Doets, M Van der Eijk, R Gouz, I Groep, D Gromov, V Hierck, R Hommels, l Jans, E Ketel, T Klous, S Köne, B Merk, M Mul, F Needham, M Schuijlenburg, H Sluijk, T Van Tilburg, J De Vries, H Wiggers, L Zupan, M Gao, C S Jiang, C Sun, H Zhu, Z Bisset, M Cheng, J P Cui, Y G Dai, Y Gao, Y He, H J Huang, C Kuang Yu Ping Li, Y J Li, Q Liao, Y Ni, J P Shao Bei Bei Su, J J Tian, Y R Wang, Q Yan, Q S Banas, E Blocki, J Galuszka, K Hajduk, L Jalocha, P Kapusta, P Kisielewski, B Kucewicz, W Lesiak, T Michalowski, J Muryn, B Natkaniec, Z Ostrowicz, W Polok, G Rulikowska-Zarebska, E Stodulski, M Szumlak, T Witek, M Zychowski, P Adamus, M Chlopik, A Guzik, Z Nawrot, A Szekowski, M Anghel, D V Coca, C Cimpean, A Giolu, G Magureanu, C Popescu, S Preda, T Rosca, A M Rusu, V L Bolotov, V N Filippov, S N Gavrilov, J Guschin, E Kloubov, V Kravchuk, L V Laptek, S Laptev, V D Postoev, V Sadovskii, A Semeniouk, I N Barsuk, S Belyaev, I Golutvin, A Gouchtchine, O Kiritchenko, V Kochetkov, V Korolko, I Pakhlova, G Levitski, N Morozov, A Pakhlov, P Roussinov, D Rusinov, V Yu Semenov, S V Soldatov, A Tarkovski, E Beloborodov, K I Bondar, A E Bozhenok, A Buzulutskov, A F Eidelman, S Golubev, V B Krokovnyi, P P Oreshkin, S B Poluektov, A Serednyakov, S I Shekhtman, L I Shwartz, B A Silagadze, Z K Vasilev, A Afanassieva, L A Ajinenko, I Belous, K S Brekhovskikh, V Denissov, S Dorokhov, A V Dzhelyadin, R I Kobelev, A Konoplyannikov, A K Likhoded, A K Matveev, V D Novikov, V Obraztsov, V F Ostankov, A P Rykalin, V I Semenov, V K Shapkin, M M Smirnov, N Sokolov, A Soldatov, M M Talanov, V V Yushchenko, O P Botchine, B Guetz, S Kashchuk, A Lazarev, V A Saguidova, N Souvorov, V Spiridenkov, E M Vorobyov, A Vorobyov, An Aguiló, E Ballabriga, R Ferragut, S Garrido, L Gascón, D Graciani-Díaz, R Luengo, S Miquel, R Peralta, D Roselló, M Vilasís, X Adeva, B Conde, P Gómez, F Hernando, J A Iglesias, A López-Aguera, A Pazos, A Pló, M Rodríguez, J M Saborido, J J Tobar, M J Bartalini, P Bay, A Carron, B Currat, C Dormond, O Dürrenmatt, F Ermoline, Y Frei, R Gagliardi, G Haefeli, G Hertig, J P Koppenburg, P Nakada, T Perroud, Jean-Pierre Ronga, F Schneider, O Studer, L Tareb, M Tran, M T Bernet, R Holzschuh, E Lehner, F Sievers, P Steinkamp, O Straumann, U Vollhardt, A Wyler, D Ziegler, M Dovbnya, A Maznichenko, S Omelaenko, O Ranyuk, Y Shulayev, V Aushev, V M Kiva, V Kolomiets, I Pavlenko, Ya V Pugatch, V Vasilev, Yu Brook, N H Cole, J E Head, R D Phillips, A Presland, A Wilson, F F George, K Gibson, V Jones, C R Katvars, S G Shepherd-Themistocleous, C H Ward, C P Wotton, S A Brew, C A J Densham, C J Easo, S Franek, B J Guy, J G V Halsall, R Lidbury, J A Morris, J V Papanestis, A Patrick, G N Soler, F J P Temple, S A Woodward, M L Barczyk, A Eisenhardt, S Khan, A Muheim, F Playfer, S Walker, A Flavell, A J Halley, A O'Shea, V Pickford, A Soler, F J P Biagi, S F Bowcock, T J V Gamet, R McCubbin, M L Palacios, J Parkes, C Patel, G Wright, V Barber, G J Clark, D Dauncey, P Duane, A Egede, U Girone, M Hassard, J Hill, R John, M J J Jolly, S Price, D R Savage, P Toudup, L W Websdale, D M Adinolfi, M Damerell, G Bibby, J Charles, M J Harnew, N Harris, F McArthur, I C Rademacker, J Smale, N J Topp-Jørgensen, S Wilkinson, G R Anelli, G Anghinolfi, F Bal, F Benayoun, M Beneyton, R Bonivento, W Braem, André Buytaert, J Campbell, M Cass, A J Cattaneo, M Charpentier, P Chesi, Enrico Guido Christiansen, J Closier, J Collins, P Corti, G D'Ambrosio, C Dijkstra, H Dufey, J P Ferro-Luzzi, M Fiedler, F Flegel, Wilfried Formenti, F Forty, R W Frank, M Frei, C García-Alfonso, I Gaspar, C Gavillet, P Gracía-Abríl, G Guirao-Elias, A Gys, Thierry Hahn, F Haider, S Harvey, J Hay, B Van Herwijnen, Eric Hilke, H J Von Holtey, G Hutchroft, D Jacobsson, R Jarron, Pierre Joram, Christian Jost, B Lacarrère, D Laub, M Letheren, M F Libby, J Lippmann, C Lindner, R Losasso, M Mato-Vila, P Müller, H Neufeld, N Österberg, K Padilla, C Parzefall, U Ponce, S Ranjard, F Riegler, W Röhner, F Roiser, S Ruf, T Schmeling, S Schmidt, B Schneider, T Schopper, A Snoeys, W Tejessy, W Teubert, F Toledo-Alarcón, J F Ullaland, O Valassi, Andrea Vázquez-Regueiro, P Videau, I Wertelaers, Piet Wright, A Wyllie, K Barbosa-Marinho, P R 2001 2001 Dufey, J P Jacobsson, R Jost, B Neufeld, N 10.5170/CERN-2001-005.282 2001 2001 Barbosa-Marinho, P R Bediaga, I Barbosa-Ademarlaudo, F Magnin, J Marques de Miranda, J Massafferri, A Reis, A Silva, R Amato, S Colrain, P Da Silva, T De Mello-Neto, J R T De Paula, L S Gandelman, M Lopes, J H Maréchal, B Moraes, D Polycarpo, E Vinci do Santos, S Ajaltouni, Ziad J Böhner, G Breton, V Cornat, R Deschamps, O Falvard, A Henrard, P Lecoq, J Perret, P Rimbault, C Trouilleau, C Ziad, A Aslanides, E Cachemiche, J P Le Gac, R Leroy, O 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M Vitale, A Zoccoli, A Cardini, A Caria, M Lai, A Pinci, D Saitta, B Baldini, W Carassiti, V Cotta-Ramusino, A Dalpiaz, P Gianoli, A MArtini, M Petrucci, F Savrié, M Bizzeti, A Calvetti, M Collazuol, G Iacopini, E Lenti, M Martelli, F Passaleva, G Veltri, M Cueno, S Fontanelli, F Gracco, V Musico, P Petrolini, A Sannino, M Alemi, M Bellunato, T F Calvi, M Metteuzzi, C Musy, M Negri, P Paganoni, M Piazzoni, C Auriemma, G Bocci, V Bosio, V Fidanza, D Frenkel, A Harrison, K Martellotti, G Martínez, S Penso, G Santacesaria, R Satriano, C Satta, A Carboni, G Dominici, Daniele Ganis, G Messi, R Pacciani, L Paoluzi, L Santovetti, E van Apeldoorn, G Arink, R Van Bakel, N Bauer, T S Berkien, A Van Beuzekom, M G Van den Born, E A Van den Brand, J F J Bulten, H J Cârloganu, C Ceelie, L Doets, M Van der Eijk, R Gouz, I Gromov, V Hierck, R Hommels, l Jans, E Ketel, T Klous, S Köne, B Kruiper, H Merk, M Mul, F Needham, M Van Petten, O Schuijlenburg, H Sluijk, T Stolte, J Van Tilburg, J De Vries, H 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Cattaneo, M Charpentier, P Chesi, Enrico Guido Christiansen, J Chytracek, R Closier, J Collins, P Corti, G D'Ambrosio, C Dijkstra, H Dufey, J P Ferro-Luzzi, M Fiedler, F Flegel, Wilfried Formenti, F Forty, Roger W Frank, M Frei, C García-Alfonso, I Gaspar, C Gavillet, P Gracía-Abríl, G Guirao-Elias, A Gys, Thierry Hahn, F Haider, S Harvey, J Hay, B Van Herwijnen, Eric Hilke, Hans Jürgen Von Holtey, G Hutchroft, D Jacobsson, R Jarron, Pierre Joram, Christian Jost, B Lacarrère, D Laub, M Letheren, M F Lippmann, C Lindner, R Losasso, M Mato-Vila, P Müller, H Neufeld, N Ocariz, J Osterbeg, K Padilla, C Parzefall, U Ponce, S Ranjard, F Riegler, W Röhner, F Roiser, S Ruf, T Schmeling, S Schmidt, B Schneider, T Schopper, A Snoeys, W Souvorov, V Tejessy, W Teubert, F Toledo-Alarcón, J Ullaland, O Valassi, Andrea Vázquez-Regueiro, P Wertelaers, Piet Wright, A Wyllie, K 2001 2001 2001 2001 Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. 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Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tchikilev, O. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M. Eur. Phys. J. C 10.1007/s100520100690 455-478 20 2001 2001 The semileptonic branching fractions for primary and cascade b decays BR(b -> lepton-), BR(b -> c -> lepton+) and BR(b -> cbar -> lepton-) were measured in hadronic Z decays collected by the DELPHI experiment at LEP. The sample was enriched in b decays using the lifetime information and various techniques were used to separate leptons from direct or cascade b decays. By fitting the momentum spectra of di-leptons in opposite jets, the average b mixing parameter chi-bar was also extracted. The following results have been obtained: BR(b -> lepton-) = (10.70 +/- 0.08 (stat) +/- 0.21 (syst)_{+0.44}^{-0.30}(model))% BR(b -> c -> lepton+) = ( 7.98 +/- 0.22 (stat) +/- 0.21 (syst)^{+0.14}_{-0.20}(model))% BR(b -> cbar -> lepton-) = (1.61 +/- 0.20 (stat) +/- 0.17 (syst)^{+0.30}_{-0.44}(model))% chi-bar = 0.127 +/- 0.013 (stat) +/- 0.005 (syst) +/- 0.004(model) Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. 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B 10.1016/S0370-2693(01)00807-3 238 515 2001 2001 The cross-sections for the production of single charged and neutral intermediate vector bosons were measured using integrated luminosities of 52~pb$^{-1}$ and 154~pb$^{-1}$ collected by the DELPHI experiment at centre-of-mass energies of 182.6~GeV and 188.6~GeV, respectively. The cross-sections for the reactions were determined in limited kinematic regions. The results found are in agreement with the Standard Model predictions for these channels. 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Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.P. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. Merle, E. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Monig, Klaus Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Oblakowska-Mucha, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Szumlak, T. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M. Eur. Phys. J. C 10.1007/PL00011152 617-637 20 2001 2001 Using data collected in the DELPHI detector at LEP-1, measurements of the inclusive tau branching ratios for decay modes containing one, three, or five charged particles have been performed, giving the following results: B_1 = B(\tau^- -> (particle)^- \geq 0pi^0 \geq 0K^0 \nu_\tau(\bar{\nu})) = (85.316 +/- 0.093 +/- 0.049)%; B_3 = B(\tau^- -> 2h^-h^+ \geq 0pi^0 \geq 0K^0 \nu_\tau) = (14.569 +/- 0.093 +/- 0.048)%; B_5 = B(\tau^- -> 3h^-2h^+ \geq 0pi^0 \geq 0K^0 \nu_\tau) = (0.115 +/- 0.013 +/- 0.006)%, where h is either a charged pi or K meson. The first quoted uncertainties are statistical and the second systematic. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Bellunato, T.F. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, Mikhail S. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.P. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Monig, Klaus Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(01)00453-1 159 511 2001 2001 A measurement of the W mass and width has been performed by the DELPHI collaboration using the data collected during 1998. The data sample has an integrated luminosity of 155 pb^{-1} and an average centre-of-mass energy of 188.6 GeV. Results are obtained by applying the method of direct reconstruction of the mass of the W from its decay products in both the W+W- -> lvqq and W+W- -> qqqq channels. The W mass result for the 1998 data set is M_W = 80.387 +/- 0.087 (stat) +/- 0.034 (syst) +/- 0.017 (LEP) +/- 0.035 (FSI) GeV/c2, where FSI represents the uncertainty due to final state interaction effects in the qqqq channel, and LEP represents that arising from the knowledge of the beam energy of the accelerator. Combining this result with those previously published by the DELPHI collaboration gives the result M_W = 80.359 +/- 0.074 (stat) +/- 0.032 (syst) +/- 0.017 (LEP) +/- 0.033 (FSI) GeV/c2. The combined value for the W width is \Gamma_W = 2.266 +/- 0.176 (stat) +/- 0.056 (syst) +/- 0.052 (FSI) GeV/c2. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(01)00569-X 55-74 510 2001 2001 A new precise measurement of |V_{cb}| and of the branching ratio BR(\bar{B^0} -> D^{*+} \ell^- \bar{\nu_\ell}) has been performed using a sample of about 5000 semileptonic decays \bar{B^0} -> D^{*+} \ell^- \bar{\nu_\ell}, selected by the DELPHI detector at LEP I by tagging the soft pion from D^{*+} -> D^0 \pi^+. The results are: V_{cb}=(39.0 +/- 1.5 (stat.) ^{+2.5}_{-2.6} (syst. exp.) +/- 1.3 (syst. th.)) x 10^{-3} BR(\bar{B^0} -> D^{*+} \ell^- \bar{\nu_\ell})=(4.70 +/- 0.13 (stat.) ^{+0.36} _{-0.31} (syst. exp.))% The analytic dependences of the differential cross-section and of the Isgur Wise form factor as functions of the variable w = v_{B^0}.v_{D^*} have also been obtained by unfolding the experimental resolution. Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, Mikhail S. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.P. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Monig, Klaus Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van den Boeck, W. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(01)00449-X 89-103 507 2001 2001 Higgs bosons predicted by the fermiophobic scenario within Two Higgs Doublets Models were searched for in the data collected by the DELPHI detector at centre-of-mass energies between 189 GeV and 202 GeV, corresponding to a total integrated luminosity of 380 pb^{-1}. No signal was found and confidence limits were derivedwska, Agni Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z Alderweireld, T Alekseev, G D Alemany, R Allmendinger, T Allport, P P Almehed, S Amaldi, Ugo Amapane, N Amato, S Anassontzis, E G Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, W D Arnoud, Y Åsman, B Augustin, J E Augustinus, A Baillon, Paul Bambade, P Barão, F Barbiellini, Guido Barbier, R Bardin, Dimitri Yuri Barker, G Baroncelli, A Battaglia, Marco Baubillier, M Becks, K H Begalli, M Behrmann, A Beillière, P Belokopytov, Yu A Belous, K S Benekos, N C Benvenuti, Alberto C Bérat, C Berggren, M Bertini, D Bertrand, D Besançon, M Bigi, M Bilenky, S M Bizouard, M A Bloch, D Blom, H M Bonesini, M Boonekamp, M Booth, P S L Borgland, A W Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, T J V Boyko, I Bozovic, I Bozzo, M Bracko, M Branchini, P Brenner, R A Brückman, P Brunet, J M Bugge, L Buran, T Buschbeck, Brigitte Buschmann, P Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V Carena, F Carroll, L Caso, Carlo Castillo-Gimenez, M V Cattai, A Cavallo, F R Chabaud, V Chapkin, M M Charpentier, P Chaussard, L Checchia, P Chelkov, G A Chierici, R Shlyapnikov, P Chochula, P Chorowicz, V Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E Cosme, G Cossutti, F Crawley, H B Crennell, D J Crépé, S Crosetti, G Cuevas-Maestro, J Czellar, S Dalmau, J Davenport, M Da Silva, W Della Ricca, G Delpierre, P A Demaria, N De Angelis, A de Boer, Wim De Clercq, C De Lotto, B De Min, A De Paula, L S Dijkstra, H Di Ciaccio, Lucia Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M Duperrin, A Durand, J D Eigen, G Ekelöf, T J C Ekspong, Gösta Ellert, M Elsing, M Engel, J P Espirito-Santo, M C Fanourakis, G K Fassouliotis, D Fayot, J Feindt, Michael Ferrer, A Ferrer-Ribas, E Ferro, F Fichet, S Firestone, A Flagmeyer, U Föth, H Fokitis, E Fontanelli, F Franek, B J Frodesen, A G Frühwirth, R Fulda-Quenzer, F Fuster, J A Galloni, A Gamba, D Gamblin, S Gandelman, M García, C Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, E N Gelé, D Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gómez-Ceballos, G Gonçalves, P González-Caballero, I Gopal, Gian P Gorn, L Guz, Yu Gracco, Valerio Grahl, J Graziani, E Gris, P Grosdidier, G Grzelak, K Guy, J Hahn, F Hahn, S Haider, S Hallgren, A Hamacher, K Hansen, J Harris, F J Hedberg, V Heising, S Hernández, J J Herquet, P Herr, H Hessing, T L Heuser, J M Higón, E Holmgren, S O Holt, P J Hoorelbeke, S Houlden, M A Hrubec, Josef Huber, M Huet, K Hughes, G J Hultqvist, K Jackson, J N Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B Jeans, D Johansson, E K Jönsson, P E Joram, C Juillot, P Jungermann, L Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, E C Keränen, R Kernel, G Kersevan, Borut P Khokhlov, Yu A Khomenko, B A Khovanskii, N N Kiiskinen, A P King, B J Kinvig, A Kjaer, N J Klapp, O Klein, H Kluit, P M Kokkinias, P Kostyukhin, V Kourkoumelis, C Kuznetsov, O Krammer, Manfred Kriznic, E Krumshtein, Z Kubinec, P Kurowska, J Kurvinen, K L Lamsa, J Lane, D W Lapin, V Laugier, J P Lauhakangas, R Leder, Gerhard Ledroit, F Lefébure, V Leinonen, L Leisos, A Leitner, R Lemonne, J Lenzen, Georg Lepeltier, V Lesiak, T Lethuillier, M Libby, J Liebig, W Liko, D Lipniacka, A Lippi, I Lörstad, B Loken, J G Lopes, J H López, J M López-Fernandez, R Loukas, D Lutz, P Lyons, L MacNaughton, J N Mahon, J R Maio, A Malek, A Malmgren, T G M Maltezos, S Malychev, V Mandl, F Marco, J Marco, R P Maréchal, B Margoni, M Marin, J C Mariotti, C Markou, A Martínez-Rivero, C Martínez-Vidal, F Martí i García, S Masik, J Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, Giorgio Mazzucato, F Mazzucato, M McCubbin, M L McKay, R McNulty, R McPherson, G Meroni, C Meyer, W T Myagkov, A Migliore, E Mirabito, L Mitaroff, Winfried A Mjörnmark, U Moa, T Moch, M Møller, R Mönig, K Monge, M R Moreau, X Morettini, P Morton, G A Müller, U Münich, K Mulders, M Mulet-Marquis, C Muresan, R Murray, W J Muryn, B Myatt, Gerald Myklebust, T Naraghi, F Nassiakou, M Navarria, Francesco Luigi Navas, S Nawrocki, K Negri, P Neufeld, N Nicolaidou, R Nielsen, B S Niezurawski, P Nikolenko, M Nomokonov, V P Nygren, A Obraztsov, V F Olshevskii, A G Onofre, A Orava, Risto Orazi, G Österberg, K Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H Papadopoulou, T D Papageorgiou, K Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O Pavel, T Pegoraro, M Peralta, L Pernicka, Manfred Perrotta, A Petridou, C Petrolini, A Phillips, H T Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, M E Polok, G Poropat, P Pozdnyakov, V Privitera, P Pukhaeva, N Pullia, Antonio Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, P N Read, A L Rebecchi, P Redaelli, N G Regler, Meinhard Rehn, J Reid, D Reinhardt, R Renton, P B Resvanis, L K Richard, F Rídky, J Rinaudo, G Ripp-Baudot, I Røhne, O M Romero, A Ronchese, P Rosenberg, E I Rosinsky, P Roudeau, Patrick Rovelli, T Royon, C Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Yu Sadovskii, A Sajot, G Salt, J Sampsonidis, D Sannino, M Schwemling, P Schwering, B Schwickerath, U Scuri, F Seager, P Sedykh, Yu Segar, A M Seibert, N Sekulin, R L Shellard, R C Siebel, M Simard, L C Simonetto, F Sissakian, A N Smadja, G Smirnova, O G Smith, G R Solovyanov, O Sopczak, André Sosnowski, R Spassoff, Tz Spiriti, E Squarcia, S Stanescu, C Stanic, S Stanitzki, M Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli de Fatis, T Taffard, A C Tegenfeldt, F Terranova, F Thomas, J Timmermans, J Tinti, N Tkatchev, L G Tobin, M Todorova-Nová, S Tomaradze, A G Tomé, B Tonazzo, A Tortora, L Tortosa, P Tranströmer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Turluer, M L Tyapkin, I A Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Van der Velde, C van Dam, P Van den Boeck, W Van Doninck, W K Van Eldik, J Van Lysebetten, A Van Remortel, N Van Vulpen, I B Vegni, G Ventura, L Venus, W A Verbeure, F Verlato, M Vertogradov, L S Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, A S Voulgaris, G Vrba, V Wahlen, H Walck, C Washbrook, A J Weiser, C Wicke, D Wickens, J H Wilkinson, G R Winter, M Witek, M Wolf, G Yi, J Yushchenko, O P Zalewska-Bak, A Zalewski, Piotr Zavrtanik, D Zevgolatakos, E Zimin, N I Zinchenko, A I Zoller, P Zucchelli, G C Zumerle, G Eur. Phys. J. C 549-551 17 2000 2000 A more general MSSM parameter scan is described Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, Mikhail S. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.P. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Monig, Klaus Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Muller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Chikilev, O. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van den Boeck, W. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(01)00207-6 34-48 503 2001 2001 An update of the search for sleptons, neutralinos and charginos in the context of scenarios where the lightest supersymmetric particle is the gravitino and the next-to-lightest supersymmetric particle is a slepton, is presented, together with the update of the search for heavy stable charged particles in light gravitino scenarios and Minimal Supersymmetric Standard Models. Data collected in 1999 with the DELPHI detector at centre-of-mass energies around 192, 196, 200 and 202 GeV were analysed. No evidence for the production of these supersymmetric particles was found. Hence, new mass limits were derived at 95% confidence level. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, Mikhail S. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.P. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Monig, Klaus Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Muller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Chikilev, O. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(01)00135-6 9-23 502 2001 2001 Measurements of the trilinear gauge boson couplings $WW\gamma$ and $WWZ$ are presented using the data taken by DELPHI in 1998 at a centre-of-mass energy of 189~GeV and combined with DELPHI data at 183~GeV. Values are determined for \Dgz\ and \Dkg, the differences of the $WWZ$ charge coupling and of the $WW\gamma$ dipole coupling from their Standard Model values, and for \lm, the $WW\gamma$ quadrupole coupling. A measurement of the magnetic dipole and electric quadrupole moment of the $W$ is extracted from the results for \Dkg{} and \lm. The study uses data from the final states \jjlv, \jjjj \lX, \jjX\ and \gX, where $j$ represents a quark jet, $\ell$ an identified lepton and $X$ missing four-momentum. The observations are consistent with the predictions of the Standard Model. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, Mikhail S. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.P. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. Merle, E. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Monig, Klaus Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Muller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Chikilev, O. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(01)00069-7 23-37 499 2001 2001 Searches for the Standard Model Higgs boson have been performed in the data collected by the DELPHI experiment at LEP in the year 2000 at centre-of-mass energies between 200 and 209~\mbox{${\mathrm{GeV}} $} corresponding to a total integrated \mbox{luminosity} of 224~\mbox{pb$^{-1}$}. No evidence for a Higgs signal is observed in the kinematically accessible mass range, and a 95\% CL lower mass limit of 114.3~\mbox{${\mathrm{GeV}}/c ^2 $} is set, to be compared with an expected median limit of 113.5~\mbox{${\mathrm{GeV}}/c^2 $} for these data. Abreu, P. Adam, W. Adye, T. Adzic, P. Azhinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Guz, Yu. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.P. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Monig, Klaus Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Muller, U. Munich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevsky, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Solovianov, O. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van Den Boeck, W. Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zumerle, G. Zupan, M. Eur. Phys. J. C 10.1007/s100520100595 29-42 19 2001 2001 Data taken by the {\tt DELPHI} experiment at centre-of-mass energies of 183~\GeV\ and 189~\GeV\ with a total integrated luminosity of 212 pb$^{-1} have been used to search for the supersymmetric partners of the electrons, muons, and taus in the context of the Minimal Supersymmetric Standard Model (MSSM). The decay topologies searched for were the direct decay ({\tilde \ell} -> \ell {\tilde\chi_1^0}), producing acoplanar lepton pairs plus missing energy, and the cascade decay ({\tilde \ell} -> \ell {\tilde \chi_2^0} -> \ell\gamma {\tilde \chi_1^0}), producing acoplanar lepton and photon pairs plus missing energy. The observed number of events is in agreement with Standard Model predictions. The 95% CL excluded mass limits for selectrons, smuons and staus are m_{\tilde {e}\leq 87 GeV/c^2, m_{\tilde {\mu}} \leq 80 GeV/c^2 and m_{\tilde {\tau}} \leq 75 GeV/c^2, respectively, for values of \mu=-200 GeV/c^2 and tan(beta)=1.5. Abreu, P. Adam, W. Adye, T. Adzic, P. Azhinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Fenyuk, A. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Lorstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Myagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Muller, U. Munich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, Sergio Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevsky, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Chikilev, O. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van Den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G. Eur. Phys. J. C 10.1007/s100520100592 15-28 19 2001 2001 Muon pair production in the process $e^+e^-\to e^+e^-\mu^+\mu^-$ is studied using the data taken at LEP1 ($\sqrt{s}\simeq m_Z$) with the DELPHI detector during the years 1992-1995. The corresponding integrated luminosity is 138.5~pb$^{-1}$. The QED predictions have been tested over the whole $Q^2$ range accessible at LEP1 (from several GeV$^2/c^4$ to several hundred GeV$^2/c^4$) by comparing experimental distributions with distributions resulting from Monte Carlo simulations using various generators. Selected events are used to extract the leptonic photon structure function F 2 . Azimuthal correlations are used to obtain information on additional structure functions, FA and FB , which originate from interference terms of the scattering amplitudes. The measured ratios FA =F 2 and FB =F 2 are significantly different from zero and consistent with QED predictions. Abreu, P. Adam, W. Adye, T. Adzic, P. Azhinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.P. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Monig, Klaus Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Muller, U. Munich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevsky, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strandberg, J. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Chikilev, O. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van Den Boeck, W. Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zumerle, G. Zupan, M. Eur. Phys. J. C 10.1007/s100520100615 201-212 19 2001 2001 A search for pair-production of neutralinos at a LEP centre-of-mass energy of 189 GeV gave no evidence for a signal. This limits the neutralino production cross-section and excludes regions in the parameter space of the Minimal Supersymmetric Standard Model (MSSM). Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Mundim, L.M. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van den Boeck, W. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(01)00017-X 22-36 500 2001 2001 Searches for pair production of gauginos and squarks in $e^{+} e^{-}$ collisions at a centre-of-mass energy of 189 GeV have been performed on data corresponding to an integrated luminosity of 158 pb$^{-1}$ collected by the DELPHI detector at LEP. The data were analyzed under the assumption of non-conservation of \mbox{$R$-parity} through a single dominant $\bar{U} \bar{D} \bar{D}$~coupling between squarks and quarks. Typical final states contain between 4 and 10 jets with or without additional leptons. No excess of data above Standard Model expectations was observed. The results were used to constrain domains of the MSSM parameter space and derive limits on the masses of supersymmetric particles. The following mass limits at 95\% CL were obtained from these searches: \begin{itemize} \item neutralino mass: $m_{\tilde{\chi^0_{1}}} \ge 32$ GeV \item chargino mass: $m_{\tilde{\chi^+_{1}}} \ge 94 $ GeV \item stop and sbottom mass (indirect decay) with $\Delta M > 5$ GeV: $m_{\tilde{t_{1}}} \ge 74$ GeV, for $\Phi_{mix}=0$ rad $m_{\tilde{t_{1}}} \ge 59$ GeV, for $\Phi_{mix}=0.98 $ rad $m_{\tilde{b_{1}}} \ge 72$ GeV, for $\Phi_{mix}=0$ rad. \end{itemize} The angle $\phi_{mix}$ is the mixing angle between left and right handed quarks. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.D. Arnoud, Y. Esman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, Mikhail S. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Brodet, E. Bruckman, P. Brunet, J.M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, Ph. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hamilton, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.P. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. Merle, E. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Monig, Klaus Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, Th.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, Ph. Schwering, B. Schwickerath, U. Scuri, Fabrizio Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Sokolov, A. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van den Boeck, W. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, Ph. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(01)00143-5 24-36 502 2001 2001 Searches for spontaneous $R$-parity violating signals at $\sqrt{s}=183$\,GeV and \mbox{$\sqrt{s}=189$\,GeV} have been performed using 1997 and 1998 DELPHI data, under the assumption of $R$-parity breaking in the third lepton family. The expected topology for the decay of a pair of charginos into two acoplanar taus plus missing energy was investigated and no evidence for a signal was found. The results were used to derive a limit on the chargino mass and to constrain the allowed domains of the MSSM parameter sp. Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Muller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Mundim, L.M. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(00)01346-0 199-213 497 2001 2001 Measurements of on-shell $ZZ$ production are described, using data collected by DELPHI in 1997 and 1998, at centre-of-mass energies $\sqrt s$ = 182.6 GeV and 188.6 GeV respectively. Results obtained in each of the final states $q \bar{q} q \bar{q}$, $\mu^+ \mu^- q \bar{q}$, $e^+e^- q \bar{q}$, $\nu \bar{\nu} q \bar{q}$, $l^+l^-l^+l^-$, and $\nu \bar{\nu} l^+l^-$ are presented. The measured cross-sections for on-shell $ZZ$ production via the tree-level doubly-resonant graphs (NC02) are: \begin{tabbing} ~~~~~~~~~~\=$ \sigma_{\tiny NC02}$~(182.6 GeV) \== 0.38 $ \pm $ $0.18 ~(stat)$ $ \pm $ $0.04 ~(syst)$ pb, \\ ~~\\ \>$ \sigma_{\tiny NC02}$~(188.6 GeV) \>= 0.60 $ \pm $ $0.13 ~(stat)$ $ \pm $ $0.07 ~(syst)$ pb. \end{tabbing} They are consistent with the Standard Model expectations of 0.25 pb and 0.65 pb at each energy. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Lorstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Montenegro, J. Moraes, D. Morton, G. Muller, U. Munich, K. Mulders, M. Mulet-Marquis, C. Mundim, L.M. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Olshevsky, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van Den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(00)01198-9 203 494 2000 2000 A search for the supersymmetric partner of the goldstino, the sgoldstino S, at LEP2 is presented. The production S$\gLWahlen, H Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenke, T. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Burgsmueller, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, P. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Deghorain, A. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Fenyuk, A. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Grimm, H.J. Gris, P. Grosdidier, G. Grzelak, K. Gunther, M. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. 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Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schneider, H. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stanescu, C. Stanic, S. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Tsirou, A. Turluer, M.L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, Piet Van Den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Vollmer, C. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zucchelli, G.C. Zumerle, G. Eur. Phys. J. C 10.1007/s100520000531 229-252 18 2000 2000 The combination of these results with those obtained using $\mathrm{\rm{D}_{s}^{\pm}} \ell^{\mp}$ sample gives: %\cite{ref:dsl} \bes \ba{c} \dms > 4.9~\mbox{ps}^{-1}~\mbox{at the 95\% C.L.} \\ \mbox{$\mathrm{with~ a~ sensitivity~ of}$}~\dms = 8.7~\mbox{ps}^{-1}. \ea \ees \begin{center} $\tau_{\Bs} = 1.46\pm{0.11}~\mathrm{ps}~$ and $~\dgbs < 0.45~\mbox{at the 95\% C.L.}$ Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, Sergio Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G. Phys. Lett. B 10.1016/S0370-2693(00)01275-2 59-75 496 2000 2000 Searches for supersymmetric partners of top and bottom quarks are presented using data taken by the DELPHI experiment at LEP in 1997 and 1998. No deviations from standard model expectations are observed in these data sets, which are taken at centre-of-mass energies of 183 GeV and 189 GeV and correspond to integrated luminosities of 54 pb^{-1} and 158 pb^{-1}. These results are used in combination with those obtained by DELPHI at lower centre-of-mass energies to exclude regions in the squark-neutralino mass plane at 95% confidence level. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Guz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hajduk, Z. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kucewicz, W. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Lorstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Myagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Morettini, P. Morton, G. Muller, U. Munich, K. Mulders, M. Mulet-Marquis, C. Mundim, L.M. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Oblakowska Mucha, A. Obraztsov, V. Olshevsky, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van Den Boeck, W. Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(00)01013-3 67-80 491 2000 2000 A test of the QED process \eeintogg(\fot) is reported. The data analysed were collected with the DELPHI detector in 1998 and 1999 at the highest ener\-gies achieved at LEP, reaching 202 GeV in the centre-of-mass. The total integrated luminosity amounts to 375.7 pb$^{-1}$. The differential and total cross-sections for the process $e^+e^- \to \gamma \gamma$ were measured, and found to be in agreement with the QED prediction. 95\% Confidence Level (C.L.) lower limits on the QED cut-off parameters of $\rm \Lambda_+ >$ 330 GeV and $\rm \Lambda_{-}>$ 320 GeV were derived. A 95\% C.L. lower bound on the mass of an excited electron of 311 $\rm GeV/c^2$ (for $\lambda_{\gamma}$ =1) was obtained. s-channel virtual graviton exchange was searched for, resulting in 95\% C.L. lower limits on the string mass scale, $\rm M_S$: $\rm M_S > 713 \, GeV/c^2$ ( $\lambda=1$) and $\rm M_S > 691 \,GeV/c^2$ ($\lambda = -1$). Abreu, P. Adam, W. Adye, T. Adzic, P. Azhinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G.K. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B.J. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Lorstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Morettini, P. Morton, G. Muller, U. Munich, K. Mulders, M. Mulet-Marquis, C. Mundim, L.M. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V.F. Olshevsky, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Chikilev, O. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van Den Boeck, W. Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(00)00888-1 38-54 489 1-2 2000 2000 Searches for charginos, neutralinos and sleptons at LEP2 centre-of-mass energies from 130 GeV to 189 GeV have been used to set lower limits on the mass of the Lightest Supersymmetric Particle and other supersymmetric particles within the MSSM framework. R-parity conservation has been assumed. The lightest neutralino was found to be heavier than 32.3~\mbox{$ {\mathrm{GeV}}/c^2$} independent of the $m_0$ value. The lightest chargino, the second-to-lightest neutralino, the next-to-heaviest neutralino, the heaviest neutralino, the sneutrino and the right-handed selectron %{\mbox{$ {\tilde{\mathrm e}_R} $}} were found to be heavier than 62.4~\mbox{$ {\mathrm{GeV}}/c^2$}, 62.4~\mbox{$ {\mathrm{GeV}}/c^2$}, 99.9~\mbox{$ {\mathrm{GeV}}/c^2$}, 116.0~\mbox{$ {\mathrm{GeV}}/c^2$}, 61.0~\mbox{$ {\mathrm{GeV}}/c^2$}, and 87.0 GeV=c$^{2}$ , respectively. These limits do not depend on m0 or M2 and are valid for 1 $\le tan\beta \le 40$, in the $\mu$ region where the lightest neutralino is the LSP. If the sneutrino is heavier than the chargino the lightest neutralino has to be heavier than 32.4 GeV=c 2 . The e ects of mixings in the third family of sfermions on these limits are discussed. The confidence level of all limits given is 95%. Abreu, P. Adam, W. Adye, T. Adzic, P. Azhinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Lorstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Myagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Muller, U. Munich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, Sergio Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevsky, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van den Boeck, W. Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G. Phys. Lett. B 10.1016/S0370-2693(00)00868-6 61-70 490 1-2 2000 2000 The rapidity-rank structure of \ppb pairs is used to analyze the mechanism of baryon production in hadronic \zz decay. The relative occurrence of the rapidity-ordered configuration \pmpb, where $M$ is a meson, and that of \ppb adjacent pairs is compared. The data are found to be consistent with predictions from a mechanism producing adjacent-rank \ppb pairs, without requiring `string-ordered' \pmpb configurations. An upper limit of 15\% at 90\% confidence is determined for the \pmpb contribution. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Mundim, L.M. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van den Boeck, W. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(00)00776-0 36-52 487 2000 2000 Searches for pair production of supersymmetric particlesunder the assumption that $R$--parity is not conserved are presented,based on data recorded by the DELPHI detector in 1998from e$^{+}$e$^{-}$ collisions at a centre-of-mass energy of189~GeV. Only one $R$--parity violating $\rm{LL} \bar{\rm E}$term (i.e. one $\lambda$ coupling), which couples\mbox{scalar} leptons to leptons,is considered to be dominant at a time.Moreover, it is assumed that the strength of the $R$--parityviolating couplings is such that the lifetimes can be neglected.The search for pair production of neutralinos, charginos and sleptonshas been performed for both direct $R$--parity violating decaysand indirect cascade decays.The results are in agreement with Standard Model expectations, andare used to update the constraints on the MSSM parametervalues and the mass limits previously derived at \mbox{$\sqrt{s}$~=~183~GeV.}\\The present 95\% C.L. limits on supersymmetric particle masses are:\begin{malist}\item $m_{\tilde{\chi}^0}>~$30~\GeVcc\ and $m_{\tilde{\chi}^\pm}>$~94~\GeVcc;\item $m_{\tilde{\nu}}>$~76.5~\GeVcc \ (direct and indirect decays);\item $m_{\tilde{\ell}_R}>$~83~\GeVcc\ (indirect decay only).\end{malist} Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenke, T. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Burgsmueller, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, P. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Deghorain, A. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Fenyuk, A. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Grimm, H.J. Gris, P. Grosdidier, G. Grzelak, K. Gunther, M. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krstic, J. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, Sergio Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schneider, H. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stanescu, C. Stanic, S. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Tsirou, A. Turluer, M.L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Apeldoorn, G.W. Van Dam, Piet Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Vollmer, C. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zucchelli, G.C. Zumerle, G. Eur. Phys. J. C 10.1007/s100520000415 555-578 16 2000 2000 Lifetime and oscillations of $\Bs$ mesons have been studied in eventswith a large transverse momentum lepton and a $\Ds$ of opposite electric charge>the same hemisphere, selected from about 3.6 million hadronic $\Zz$decays accumulated by DELPHI between 1992 and 1995. \\The $\Bs$ lifetime and the fractional width difference between the two physical> Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Guz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Lorstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Merle, E. Meroni, C. Meyer, W.T. Myagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Morettini, P. Morton, G. Muller, U. Munich, K. Mulders, M. Mulet-Marquis, C. Mundim, L.M. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevsky, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Chikilev, O. Tegenfeldt, F. Terranova, F. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van Den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zumerle, G. Zupan, M. Phys. Lett. B 10.1016/S0370-2693(00)00675-4 45-61 485 2000 2000 An analysis of the data collected in 1997 and 1998 with the DELPHIdetector at $e^+e^-$ collision energies close to 183 and 189GeV was performed in order to extract the hadronic and leptonic fermion--paircross--sections, as well as the leptonic forward--backward asymmetries andangular distributions.The data are used to put limit on contact interactions between fermions,the exchange of R-parity violating SUSY sneutrinos, $\Zprime$ bosons and the existence of gravity in extra dimensions. Abreu, P. Adam, W. Adye, T. Adzic, P. Azhinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Guz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Lorstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Muller, U. Munich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, Sergio Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevsky, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Chikilev, O. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van Den Boeck, W. Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G. Phys. Lett. B 10.1016/S0370-2693(00)00693-6 95-106 485 2000 2000 The data collected by DELPHI in 1998 at the centre-of-mass energy of 189~GeVhave been used to update the search for charginos nearly mass-degenerate withthe lightest supersymmetric particle, which is assumed to be the lightest neutralino. Mass differences below $\Delta M\!=\!3$~GeV/c$^2$ are considered.No excess of events with respect to the Standard Model expectation has beenobserved, and exclusions in the plane of $\Delta M$ versus chargino mass are given. The new $\Delta M$ independent lower limit on the mass of the charginois $62.4$~GeV/c$^2$ in the higgsino scenario (which includes the gaugino massunification scenario), if all sfermions are heavier than the lightest chargino.In the approximation of large sfermion masses the limit is $59.8$~GeV/c$^2$,independently of the field content. Abreu, P Adam, W Adye, T Adzic, P Alekseev, G D Alemany, R Allport, P P Almehed, S Amaldi, Ugo Amato, S Anassontzis, E G Andersson, P Andreazza, A Antilogus, P Apel, W D Arnoud, Y Åsman, B Augustin, J E Augustinus, A Baillon, Paul Bambade, P Barão, F Barbier, R Bardin, Dimitri Yuri Barker, G Baroncelli, A Battaglia, Marco Baubillier, M Becks, K H Begalli, M Beillière, P Belokopytov, Yu A Benvenuti, Alberto C Bérat, C Berggren, M Bertini, D Bertrand, D Besançon, M Bianchi, F Bigi, M Bilenky, S M Bizouard, M A Bloch, D Bonesini, M Bonivento, W Boonekamp, M Booth, P S L Borgland, A W Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, T J V Boyko, I Bozovic, I Bozzo, M Branchini, P Brenke, T Brenner, R A Brückman, P Brunet, J M Bugge, L Buran, T Burgsmüller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Camacho-Rozas, A J Camporesi, T Canale, V Canepa, M Carena, F Carroll, L Caso, Carlo Castillo-Gimenez, M V Cattai, A Cavallo, F R Cerruti, C Chabaud, V Chapkin, M M Charpentier, P Chaussard, L Checchia, P Chelkov, G A Chen, M Chierici, R Shlyapnikov, P Chochula, P Chorowicz, V Chudoba, J Collins, P Colomer, M Contri, R Cortina, E Cosme, G Cossutti, F Cowell, J H Crawley, H B Crennell, D J Crosetti, G Cuevas-Maestro, J Czellar, S D'Almagne, B Damgaard, G Davenport, Martyn Da Silva, W Deghorain, A Della Ricca, G Delpierre, P A Demaria, N De Angelis, A de Boer, Wim De Brabandere, S De Clercq, C De Lotto, B De Min, A De Paula, L S Dijkstra, H Di Ciaccio, Lucia Di Diodato, A Djannati, A Dolbeau, J Doroba, K Dracos, M Drees, J Drees, K A Dris, M Duperrin, A Durand, J D Ehret, R Eigen, G Ekelöf, T J C Ekspong, Gösta Ellert, M Elsing, M Engel, J P Erzen, B Espirito-Santo, M C Falk, E Fanourakis, G K Fassouliotis, D Fayot, J Feindt, Michael Fenyuk, A Ferrari, P Ferrer, A Fichet, S Firestone, A Fischer, P A Flagmeyer, U Föth, H Fokitis, E Fontanelli, F Franek, B J Frodesen, A G Frühwirth, R Fulda-Quenzer, F Fuster, J A Galloni, A Gamba, D Gandelman, M García, C García, J Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, E N Gelé, D Gerber, J P Gerdyukov, L N Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gonçalves, P González-Caballero, I Gopal, Gian P Gorn, L Górski, M Guz, Yu Gracco, Valerio Grahl, J Graziani, E Green, C Grefrath, A Gris, P Grzelak, K Günther, M Guy, J Hahn, F Hahn, S Haider, S Hallgren, A Hamacher, K Harris, F J Hedberg, V Heising, S Henriques, R P Hernández, J J Herquet, P Herr, H Hessing, T L Heuser, J M Higón, E Holmgren, S O Holt, P J Holthuizen, D J Hoorelbeke, S Houlden, M A Hrubec, Josef Huet, K Hultqvist, K Jackson, J N Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B Johansson, E K Jönsson, P E Joram, C Juillot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, E C Keränen, R Khomenko, B A Khovanskii, N N Kiiskinen, A P King, B J Kjaer, N J Klapp, O Klein, H Kluit, P M Knoblauch, D Kokkinias, P Konoplyannikov, A K Koratzinos, M Kostyukhin, V Kourkoumelis, C Kuznetsov, O Krammer, Manfred Kreuter, C Kriznic, E Krstic, J Krumshtein, Z Kubinec, P Kucewicz, W Kurvinen, K L Lamsa, J Lanceri, L Lane, D W Langefeld, P Lapin, V Laugier, J P Lauhakangas, R Leder, Gerhard Ledroit, F Lefébure, V Leinonen, L Leisos, A Leitner, R Lemonne, J Lenzen, Georg Lepeltier, V Lesiak, T Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Lörstad, B Lokajícek, M Loken, J G Lopes, J H López, J M López-Fernandez, R Loukas, D Lutz, P Lyons, L MacNaughton, J N Mahon, J R Maio, A Malek, A Malmgren, T G M Malychev, V Mandl, F Marco, J Marco, R P Maréchal, B Margoni, M Marin, J C Mariotti, C Markou, A Martínez-Rivero, C Martínez-Vidal, F Martí i García, S Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, Giorgio Masik, J Mazzucato, F Mazzucato, M McCubbin, M L McKay, R McNulty, R McPherson, G Meroni, C Migliore, E Mirabito, L Mitaroff, Winfried A Mjörnmark, U Moa, T Møller, R Mönig, K Monge, M R Moreau, X Morettini, P Morton, G A Münich, K Mulders, M Mulet-Marquis, C Muresan, R Murray, W J Muryn, B Myatt, Gerald Myklebust, T Naraghi, F Navarria, Francesco Luigi Navas, S Nawrocki, K Negri, P Neufeld, N Neumann, W Neumeister, N Nicolaidou, R Nielsen, B S Nieuwenhuizen, M Nikolaenko, V Nikolenko, M Nomokonov, V P Normand, Ainsley Nygren, A Obraztsov, V F Olshevskii, A G Onofre, A Orava, Risto Orazi, G Österberg, K Ouraou, A Paganini, P Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H Papadopoulou, T D Papageorgiou, K Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A Pegoraro, M Peralta, L Pernicka, Manfred Perrotta, A Petridou, C Petrolini, A Phillips, H T Piana, G Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, M E Polok, G Poropat, P Pozdnyakov, V Privitera, P Pukhaeva, N Pullia, Antonio Radojicic, D Ragazzi, S Rahmani, H Rakoczy, D Ratoff, P N Read, A L Rebecchi, P Redaelli, N G Regler, Meinhard Reid, D Reinhardt, R Renton, P B Resvanis, L K Richard, F Rídky, J Rinaudo, G Røhne, O M Romero, A Ronchese, P Rosenberg, E I Rosinsky, P Roudeau, Patrick Rovelli, T Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Yu Sadovskii, A Sajot, G Salt, J Sampsonidis, D Sannino, M Schneider, H Schwemling, P Schwickerath, U Schyns, M A E Scuri, F Seager, P Sedykh, Yu Segar, A M Sekulin, R L Shellard, R C Sheridan, A Silvestre, R Simard, L C Simonetto, F Sissakian, A N Skaali, T B Smadja, G Smirnova, O G Smith, G R Sopczak, André Sosnowski, R Spassoff, Tz Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stapnes, Steinar Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli de Fatis, T Tegenfeldt, F Terranova, F Thomas, J Tilquin, A Timmermans, J Tkatchev, L G Todorov, T Todorova-Nová, S Toet, D Z Tomaradze, A G Tonazzo, A Tortora, L Tranströmer, G Treille, D Tristram, G Trombini, A Troncon, C Tsirou, A L Turluer, M L Tyapkin, I A Tzamarias, S Überschär, B Ullaland, O Uvarov, V Valenti, G Vallazza, E Van der Velde, C van Apeldoorn, G W van Dam, P Van Doninck, W K Van Eldik, J Van Lysebetten, A Van Vulpen, I B Vassilopoulos, N Vegni, G Ventura, L Venus, W A Verbeure, F Verlato, M Vertogradov, L S Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, A S Voulgaris, G Vrba, V Wahlen, H Walck, C Weiser, C Wetherell, Alan M Wicke, D Wickens, J H Wilkinson, G R Winter, M Witek, M Wlodek, T Wolf, G Yi, J Yushchenko, O P Zaitsev, A Zalewska-Bak, A Zalewski, Piotr Zavrtanik, D Zevgolatakos, E Zimin, N I Zucchelli, G C Zumerle, G Eur. Phys. J. C 10.1007/s100520000392 371-405 16 3 2000 2000 During 1993 and 1995 LEP was run at 3 energies near the Z$^0$ peak in order to give improved measurements of the mass and width of the resonance. During 1994, LEP operated only at the Z$^0$peak. In total DELPHI accumulated data corresponding to an integrated luminosity of approximately 116~pb$^{-1}$. Analyses ofthe hadronic cross-sections and of the cross-sections and forward-backward asymmetries in the leptonic channels used the most precise evaluations of the LEP energies. In the dimuon channel, events with a photon radiated from the initialstate have been used to probe the cross-sections and asymmetries down to PETRA energies.Model independent fits to all DELPHI lineshape and asymmetry data from 1990 to 1995have been carried out giving values ofthe resonance parameters:\MZ & = & 91.1863\pm0.0028~\GeV \\\GZ & = & ~2.4876\pm0.0041~\GeV \\ \sigma_{0} & = & 41.578\pm0.069~\nb \\R_l & = & 20.730\pm0.060 \\\Afbzero & = & 0.0187\pm0.0019.These values are significantly more precise than those previously published. The results are interpreted in terms of the Standard Model. Abreu, P. Adam, W. Adye, T. Adzic, P. Azhinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, P. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Lorstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Myagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moreau, X. Morettini, P. Morton, G. Muller, U. Munich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, Sergio Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevsky, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van Den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G. Phys. Lett. B 10.1016/S0370-2693(00)00040-X 407-28 475 3-4 D* pi l nubar 2000 2000 A study of $b$ semileptonic decays into $D$, $D\pi^{\pm}$ and $D^*\pi^{\pm}$ final states is presented.The $D^0$, $D^+$ and $D^{*+}$ mesons are exclusively reconstructed in $Z$ decay data recorded from 1992 to 1995in the DELPHI experiment at LEP. The overall branching fractions are measured to be: $BR(b -> D^0 \ell^- \bar{\nu}_{\ell} X) = (7.04 +/- 0.34 (stat) +/- 0.36 (syst.exp) +/- 0.17 (BR_D))\%,$ $BR(b -> D^+ \ell^- \bar{\nu}_{\ell} X) = (2.72 +/- 0.19 (stat) +/- 0.16 (syst.exp) +/- 0.18 (BR_D))\%$, $BR(b -> D^{*+} \ell^- \bar{\nu}_{\ell} X) = (2.75 +/- 0.17 (stat) +/- 0.13 (syst.exp) +/- 0.09 (BR_D))\%$ where the $D^0$ and $D^+$ results include also contributions from $D^{*0}$ and $D^{*+}$ decays. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, P. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Lorstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Myagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moreau, X. Morettini, P. Morton, G. Muller, U. Munich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, Sergio Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevsky, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van Den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G. Eur. Phys. J. C 10.1007/s100520000401 187-205 17 e+ e- 2000 2000 Searches for neutral Higgs bosons in the Standard Model and the MSSM havebeen performed using data collected by the DELPHI experiment at acentre-of-mass energy of 188.7 GeV, corresponding toan integrated luminosity of 158~pb$^{-1}$.These analyses are used, in combination with our results from lowerenergies, to set new 95\% confidence level lower mass bounds on theStandard Model Higgs boson (94.6 GeV/$c^2$) and on the lightest neutralscalar (82.6 GeV/$c^2$) and neutral pseudoscalar (84.1 GeV/$c^2$) Higgsbosons in a representative scan of the MSSM parameters. The results are alsointerpreted in the framework of a general two-Higgs doublet model. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, Dmitri Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chizhov, M. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Fenyuk, A. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krstic, J. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, Sergio Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Chikilev, O. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Van den Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G. Eur. Phys. J. C 10.1007/s100520050017 229-252 16 2000 2000 This paper describes a measurement of the Michel parameters, $\eta$, $\rho$, $\xi$, $\xi \delta$, and the average $\nu_{\tau}$helicity, $h_{\nu_{\tau}}$, in $\tau$ lepton decays together withthe first measurement of the tensor coupling in the weak charged current.The $\tau^{+} \tau^{-}$ pairs were produced at the LEP $\mathrm{e^{+} e^{-}}$collider at CERN from 1992 through 1995 in the DELPHI detector.Assuming lepton universality in the decays of the $\tau$ the measured valuesof the parameters were:$\eta = -0.005 \pm 0.036 \pm 0.037$,$\rho = 0.775 \pm 0.023 \pm 0.020$,$\xi = 0.929 \pm 0.070 \pm 0.030$,$\xi\delta = 0.779 \pm 0.070 \pm 0.028$, $h_{\nu_{\tau}} = -0.997 \pm 0.027 \pm 0.011$.The strength of the tensor coupling was measured to be $\kappa^W_\tau = -0.029\pm 0.036 \pm 0.018$. The first error is statistical and the second erroris systematic in all cases.The results are consistent with the $V\!-\!A$ structure of the weak chargedcurrent in decays of the $\tau$ lepton. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W-D. Arnoud, Y. Asman, B. Augustin, J-E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K-H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bigi, M. Bilenky, M.S. Bizouard, M-A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J-M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. M.Castillo Gimenez, V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, Ph. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J-P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Geralis, T. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Cubbin, M.Mc Kay, R.Mc Nulty, R.Mc Pherson, G.Mc Meroni, C. Metreveli, Z. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, Th.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, Ch. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, Ph. Schwering, B. Schwickerath, U. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, P. Van den Boeck, W. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, Ph. Zucchelli, G.C. Zumerle, G. Eur. Phys. J. C 10.1007/s100520000528 203-228 18 2000 2000 Inclusive distributions of charged particles in hadronic Wdecays are experimentally investigated using the statisticscollected by the DELPHI experiment at LEP during 1997, 1998and 1999, at centre-of-mass energies from 183 to around 200 GeV.The possible effects of interconnection betweenthe hadronic decays of two Ws are not observed.Measurements of the average multiplicity for charged and identified particles in q$\bar{\mathrm q}$ and WW events at centre-of-mass energies from 130 to 200 GeV and in W decays are presented.The results on the average multiplicity of identified particlesand on the position $\xi^*$ of the maximum of the maximum of$\xi_p = -\mathrm{log} (\frac{2p}{\sqrt{s}})$distribution are compared with predictionsof JETSET and MLLA calculations. Abreu, P. Adam, W. Adye, T. Adzic, P. Azhinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Harris, Elisabeth Falk Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovansky, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Muller, U. Munich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, Sergio Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevsky, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassoff, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkachev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Van Den Boeck, W. Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zinchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G. Eur. Phys. J. C 10.1007/s100520000434 53-65 17 2000 2000 The production of single photons has been studiedin the reaction e+e- --> gamma+ invisible particles at centre-of-mass energies of 183~GeV and 189~GeV.A previously published analysis of events with multi-photonfinal states accompanied by missing energy has been updated with 189 GeV data.The data were collected with the DELPHI detector and correspondto integrated luminosities of about 51~pb^{-1}and 158~pb^{-1}at thetwo energies.The number of light neutrino families is measured to be2.86\pm0.13(stat)\pm0.14(syst)$. The absence ofan excess of events beyond that expected from Standard Modelprocesses is used to set limits on new physicsas described by supersymmetric and composite models.A limit on the gravitational scale is also determined. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P.A. Demaria, N. De Angelis, A. de Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Guz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanskii, N.N. Kiiskinen, A. King, B.J. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Myagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Muller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V.F. Olshevskii, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovskii, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassoff, Tz. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli de Fatis, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A.G. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Vanden Boeck, W. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G. Eur. Phys. J. C 10.1007/s100520050016 211-228 16 2000 2000 Sleptons, neutralinos and charginos were searched for in the context of scenarios where the lightest supersymmetric particle isthe gravitino.It was assumed that the stau is the next-to-lightest supersymmetric particle.Data collected with the DELPHI detector at a centre-of-mass energy near 189 GeV were analysed combining the methods developed in previous searches at lower energies.No evidence for the production of these supersymmetric particles was found. Hence, limits were derived at 95\% confidence level. Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P.A. Demaria, N. De Angelis, A. de Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Guz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanskii, N.N. Kiiskinen, A. King, B.J. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Muller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, Sergio Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V.F. Olshevskii, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovskii, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassoff, Tz. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli de Fatis, T. Taffard, A. Chikilev, O. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A.G. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, Piet Vanden Boeck, W. Van Doninck, Walter Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G. Phys. Lett. B 10.1016/S0370-2693(00)00313-0 129-43 479 1-3 e+ e- 2000 2000 An update of the searches for charginos and gravitinodon a data sample corresponding to the 158 pb$^{-1}$ rIdetector in 1998, at a centre-of-mass energy of 18asignal was found. The lower mass limits are 4-5 GeV/$eobtained at a centre-of-mass energy of 183 GeV.The ($\mu$,M$_2$) MSSM domain excludedby combining the chargino searches with neutralino sea$resonance implies a limit on the mass ofthe lightest neutralino which, for a heavy sneutrino,e above 31.4 GeV/$c^2$ for $\tan{\beta}\geq$ 1. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.D. Arnoud, Y. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Yu. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bigi, M. Bilenky, Mikhail S. Bizouard, M.A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Shlyapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe-Renaudin, Sabine Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P.A. Demaria, N. De Angelis, A. de Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, Evangelos Gele, D. Geralis, T. Ghodbane, N. Gil Botella, Ines Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Guz, Yu. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.M. Higon, E. Holmgren, S.O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, John Neil Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, Erik Karl Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, Frederic Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu.A. Khomenko, B.A. Khovanskii, N.N. Kiiskinen, A. King, B.J. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, Hansjorg Kluit, P. Kokkinias, P. Kostyukhin, V. Kourkoumelis, C. Kuznetsov, O. Krammer, M. Kriznic, E. Krumshtein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.P. Lauhakangas, R. Leder, G. Ledroit, Fabienne Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjornmark, U. Moa, T. Moch, M. Moller, Rasmus Monig, Klaus Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Muller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, Sergio Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V.F. Olshevskii, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdnyakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, Alexander L. Rebecchi, P. Redaelli, Nicola Giuseppe Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, Isabelle Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovskii, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, Fabrizio Seager, P. Sedykh, Yu. Seemann, F. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, A. Sopczak, A. Sosnowski, R. Spassoff, Tz. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli de Fatis, T. Taffard, A. Chikilev, O. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, Jan Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A.G. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, Piet Vanden Boeck, W. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopianov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimine, N.I. Zintchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G. Eur. Phys. J. C 10.1007/s100520000449 207-222 17 2000 2000 A sample of 2.2 million hadronic \z decays, selected fythe {\sc Delphi} detector at {\sc Lep} during 1994-199nimprovedmeasurement of inclusive distributions of \pie, \kp anrantiparticles in gluon and quark jets. The production l identified particles were found to be softer in gluon kjets, with a higher multiplicity in gluon jets as obseecharged particles. A significant proton enhancement indindicating that baryon production proceeds directly fr.The maxima, $\xi^*$, of the $\xi$-distributions for kakjets are observed to be different. The study of isoscanshows no indication of an excess of $\phi(1020)$ produ. Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I Albrecht, Z Alderweireld, T Alekseev, G D Alemany, R Allmendinger, T Allport, P P Almehed, S Amaldi, Ugo Amapane, N Amato, S Anassontzis, E G Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, W D Arnoud, Y Åsman, B Augustin, J E Augustinus, A Baillon, Paul Bambade, P Barão, F Barbiellini, Guido Barbier, R Bardin, Dimitri Yuri Barker, G Baroncelli, A Battaglia, Marco Baubillier, M Becks, K H Begalli, M Behrmann, A Beillière, P Belokopytov, Yu A Benekos, N C Benvenuti, Alberto C Bérat, C Berggren, M Bertini, D Bertrand, D Besançon, M Bigi, M Bilenky, S M Bizouard, M A Bloch, D Blom, H M Bonesini, M Bonivento, W Boonekamp, M Booth, P S L Borgland, A W Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, T J V Boyko, I Bozovic, I Bozzo, M Bracko, M Branchini, P Brenner, R A Brückman, P Brunet, J M Bugge, L Buran, T Buschbeck, Brigitte Buschmann, P Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V Carena, F Carroll, L Caso, Carlo Castillo-Gimenez, M V Cattai, A Cavallo, F R Chabaud, V Charpentier, P Chaussard, L Checchia, P Chelkov, G A Chierici, R Shlyapnikov, P Chochula, P Chorowicz, V Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E Cosme, G Cossutti, F Crawley, H B Crennell, D J Crépé, S Crosetti, G Cuevas-Maestro, J Czellar, S Davenport, Martyn Da Silva, W Della Ricca, G Delpierre, P A Demaria, N De Angelis, A de Boer, Wim De Brabandere, S De Clercq, C De Lotto, B De Min, A De Paula, L S Dijkstra, H Di Ciaccio, Lucia Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M Duperrin, A Durand, J D Eigen, G Ekelöf, T J C Ekspong, Gösta Ellert, M Elsing, M Engel, J P Espirito-Santo, M C Fanourakis, G K Fassouliotis, D Fayot, J Feindt, Michael Fenyuk, A Ferrari, P Ferrer, A Ferrer-Ribas, E Ferro, F Fichet, S Firestone, A Flagmeyer, U Föth, H Fokitis, E Fontanelli, F Franek, B J Frodesen, A G Fulda-Quenzer, F Fuster, J A Galloni, A Gamba, D Gamblin, S Gandelman, M García, C Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, E N Gelé, D Gerdyukov, L N Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gómez-Ceballos, G Gonçalves, P González-Caballero, I Gopal, Gian P Gorn, L Guz, Yu Gracco, Valerio Grahl, J Graziani, E Gris, P Grosdidier, G Grzelak, K Guy, J Hahn, F Hahn, S Haider, S Hallgren, A Hamacher, K Hansen, J Harris, F J Hedberg, V Heising, S Hernández, J J Herquet, P Herr, H Hessing, T L Heuser, J M Higón, E Holmgren, Sven Olof Holt, P J Hoorelbeke, S Houlden, M A Hrubec, Josef Huber, M Huet, K Hughes, G J Hultqvist, K Jackson, J N Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B Jeans, D Johansson, E K Jönsson, P E Joram, C Juillot, P Jungermann, L Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, E C Keränen, R Kernel, G Kersevan, Borut P Khomenko, B A Khovanskii, N N Kiiskinen, A P King, B J Kinvig, A Kjaer, N J Klapp, O Klein, H Kluit, P M Kokkinias, P Kostyukhin, V Kourkoumelis, C Kuznetsov, O Krammer, Manfred Kriznic, E Krstic, J Krumshtein, Z Kubinec, P Kurowska, J Kurvinen, K L Lamsa, J Lane, D W Lapin, V Laugier, J P Lauhakangas, R Leder, Gerhard Ledroit, F Lefébure, V Leinonen, L Leisos, A Leitner, R Lenzen, Georg Lepeltier, V Lesiak, T Lethuillier, M Libby, J Liebig, W Liko, D Lipniacka, A Lippi, I Lörstad, B Loken, J G Lopes, J H López, J M López-Fernandez, R Loukas, D Lutz, P Lyons, L MacNaughton, J N Mahon, J R Maio, A Malek, A Malmgren, T G M Maltezos, S Malychev, V Mandl, F Marco, J Marco, R P Maréchal, B Margoni, M Marin, J C Mariotti, C Markou, A Martínez-Rivero, C Martínez-Vidal, F Martí i García, S Masik, J Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, Giorgio Mazzucato, F Mazzucato, M McCubbin, M L McKay, R McNulty, R McPherson, G Meroni, C Meyer, W T Myagkov, A Migliore, E Mirabito, L Mitaroff, Winfried A Mjörnmark, U Moa, T Moch, M Møller, R Mönig, K Monge, M R Moraes, D Moreau, X Morettini, P Morton, G A Müller, U Münich, K Mulders, M Mulet-Marquis, C Muresan, R Murray, W J Muryn, B Myatt, Gerald Myklebust, T Naraghi, F Nassiakou, M Navarria, Francesco Luigi Navas, S Nawrocki, K Negri, P Neufeld, N Nicolaidou, R Nielsen, B S Niezurawski, P Nikolenko, M Nomokonov, V P Nygren, A Obraztsov, V F Olshevskii, A G Onofre, A Orava, Risto Orazi, G Österberg, K Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H Papadopoulou, T D Papageorgiou, K Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O Pavel, T Pegoraro, M Peralta, L Pernicka, Manfred Perrotta, A Petridou, C Petrolini, A Phillips, H T Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, M E Polok, G Polycarpo, E Poropat, P Pozdnyakov, V Privitera, P Pukhaeva, N Pullia, Antonio Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, P N Read, A L Rebecchi, P Redaelli, N G Regler, Meinhard Rehn, J Reid, D Reinhardt, R Renton, P B Resvanis, L K Richard, F Rídky, J Rinaudo, G Ripp-Baudot, I Røhne, O M Romero, A Ronchese, P Rosenberg, E I Rosinsky, P Roudeau, Patrick Rovelli, T Royon, C Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Yu Sadovskii, A Sajot, G Salt, J Sampsonidis, D Sannino, M Schwemling, P Schwering, B Schwickerath, U Scuri, F Seager, P Sedykh, Yu Segar, A M Seibert, N Sekulin, R L Shellard, R C Siebel, M Simard, L C Simonetto, F Sissakian, A N Smadja, G Smirnov, N Smirnova, O G Smith, G R Sopczak, André Sosnowski, R Spassoff, Tz Spiriti, E Squarcia, S Stanescu, C Stanic, S Stanitzki, M Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli de Fatis, T Taffard, A C Tegenfeldt, F Terranova, F Thomas, J Timmermans, J Tinti, N Tkatchev, L G Tobin, M Todorova-Nová, S Tomaradze, A G Tomé, B Tonazzo, A Tortora, L Tortosa, P Tranströmer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Turluer, M L Tyapkin, I A Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E van Dam, P Van den Boeck, W Van Doninck, W K Van Eldik, J Van Lysebetten, A Van Remortel, N Van Vulpen, I B Vegni, G Ventura, L Venus, W A Verbeure, F Verlato, M Vertogradov, L S Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, A S Voulgaris, G Vrba, V Wahlen, H Walck, C Washbrook, A J Weiser, C Wicke, D Wickens, J H Wilkinson, G R Winter, M Witek, M Wolf, G Yi, J Yushchenko, O P Zalewska-Bak, A Zalewski, Piotr Zavrtanik, D Zevgolatakos, E Zimin, N I Zinchenko, A I Zoller, P Zucchelli, G C Zumerle, G 10.1007/s100520000363 2001 2001 The $\tau$ polarisation has been studied with the $\eett$ data collected by the DELPHI detector at LEP in 1993, 1994 and 1995 around the $\Z$ resonance firstly through the exclusive decay channels $\mbox{\rm e}\nu\bar{\nu}$, $\mu\nu\bar{\nu}$, $\pi\nu$, $\rho\nu$ and $\aone\nu$ and secondly with an inclusive hadronic analysis which benefits from a higher efficiency and a better systematic precision. The results have been combined with those previously published on 1990 to 1992 DELPHI data, to produce results which reflect the full LEP-1 statistics. The fit of the $\tau$ polarisation dependence on the production angle yielded the polarisation parameters $\atau=0.1359 \pm 0.0096$ and $\aele=0.1382 \pm 0.0116$. From these results the ratio of the vector and axial-vector effective couplings $\barvt / \barat = 0.0683\pm0.0048$ and $\barve / \barae = 0.0694\pm0.0058$ have been derived, compatible with e$-\tau$ universality. With the assumption of lepton universality,the ratio of vector to axial-vector effective couplings for leptons $\barvl / \baral = 0.0687\pm0.0037$ was obtained, implying a value of the effective weak mixing angle $\s2thw = 0.23282\pm0.00092$. Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I Albrecht, Z Alderweireld, T Alekseev, G D Alemany, R Allmendinger, T Allport, P P Almehed, S Amaldi, Ugo Amapane, N Amato, S Anassontzis, E G Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, W D Arnoud, Y Åsman, B Augustin, J E Augustinus, A Baillon, Paul Bambade, P Barão, F Barbiellini, Guido Barbier, R Bardin, Dimitri Yuri Barker, G Baroncelli, A Battaglia, Marco Baubillier, M Becks, K H Begalli, M Behrmann, A Beillière, P Belokopytov, Yu A Benekos, N C Benvenuti, Alberto C Bérat, C Berggren, M Bertini, D Bertrand, D Besançon, M Bigi, M Bilenky, S M Bizouard, M A Bloch, D Blom, H M Bonesini, M Bonivento, W Boonekamp, M Booth, P S L Borgland, A W Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, T J V Boyko, I Bozovic, I Bozzo, M Branchini, P Brenke, T Brenner, R A Brückman, P Brunet, J M Bugge, L Buran, T Burgsmüller, T Buschbeck, Brigitte Buschmann, P Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V Carena, F Carroll, L Caso, Carlo Castillo-Gimenez, M V Cattai, A Cavallo, F R Chabaud, V Charpentier, P Chaussard, L Checchia, P Chelkov, G A Chierici, R Shlyapnikov, P Chochula, P Chorowicz, V Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E Cosme, G Cossutti, F Cowell, J H Crawley, H B Crennell, D J Crépé, S Crosetti, G Cuevas-Maestro, J Czellar, S Davenport, Martyn Da Silva, W Deghorain, A Della Ricca, G Delpierre, P A Demaria, N De Angelis, A de Boer, Wim De Clercq, C De Lotto, B De Min, A De Paula, L S Dijkstra, H Di Ciaccio, Lucia Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M Duperrin, A Durand, J D Eigen, G Ekelöf, T J C Ekspong, Gösta Ellert, M Elsing, M Engel, J P Erzen, B Espirito-Santo, M C Falk, E Fanourakis, G K Fassouliotis, D Fayot, J Feindt, Michael Ferrari, P Ferrer, A Ferrer-Ribas, E Ferro, F Fichet, S Firestone, A Flagmeyer, U Föth, H Fokitis, E Fontanelli, F Franek, B J Frodesen, A G Frühwirth, R Fulda-Quenzer, F Fuster, J A Galloni, A Gamba, D Gamblin, S Gandelman, M García, C Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, E N Gelé, D Gerdyukov, L N Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gómez-Ceballos, G Gonçalves, P González-Caballero, I Gopal, Gian P Gorn, L Górski, M Guz, Yu Gracco, Valerio Grahl, J Graziani, E Green, C Grimm, H J Gris, P Grosdidier, G Grzelak, K Günther, M Guy, J Hahn, F Hahn, S Haider, S Hallgren, A Hamacher, K Hansen, J Harris, F J Hedberg, V Heising, S Hernández, J J Herquet, P Herr, H Hessing, T L Heuser, J M Higón, E Holmgren, S O Holt, P J Hoorelbeke, S Houlden, M A Hrubec, Josef Huet, K Hughes, G J Hultqvist, K Jackson, J N Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B Johansson, E K Jönsson, P E Joram, C Juillot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, E C Keränen, R Kersevan, Borut P Khomenko, B A Khovanskii, N N Kiiskinen, A P King, B J Kinvig, A Kjaer, N J Klapp, O Klein, H Kluit, P M Kokkinias, P Koratzinos, M Kostyukhin, V Kourkoumelis, C Kuznetsov, O Krammer, Manfred Kriznic, E Krstic, J Krumshtein, Z Kubinec, P Kurowska, J Kurvinen, K L Lamsa, J Lane, D W Langefeld, P Lapin, V Laugier, J P Lauhakangas, R Leder, Gerhard Ledroit, F Lefébure, V Leinonen, L Leisos, A Leitner, R Lemonne, J Lenzen, Georg Lepeltier, V Lesiak, T Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Lörstad, B Loken, J G Lopes, J H López, J M López-Fernandez, R Loukas, D Lutz, P Lyons, L MacNaughton, J N Mahon, J R Maio, A Malek, A Malmgren, T G M Maltezos, S Malychev, V Mandl, F Marco, J Marco, R P Maréchal, B Margoni, M Marin, J C Mariotti, C Markou, A Martínez-Rivero, C Martínez-Vidal, F Martí i García, S Masik, J Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, Giorgio Mazzucato, F Mazzucato, M McCubbin, M L McKay, R McNulty, R McPherson, G Meroni, C Meyer, W T Myagkov, A Migliore, E Mirabito, L Mitaroff, Winfried A Mjörnmark, U Moa, T Moch, M Møller, R Mönig, K Monge, M R Moreau, X Morettini, P Morton, G A Müller, U Münich, K Mulders, M Mulet-Marquis, C Muresan, R Murray, W J Muryn, B Myatt, Gerald Myklebust, T Naraghi, F Nassiakou, M Navarria, Francesco Luigi Navas, S Nawrocki, K Negri, P Némécek, S Neufeld, N Neumeister, N Nicolaidou, R Nielsen, B S Nikolenko, M Nomokonov, V P Normand, Ainsley Nygren, A Obraztsov, V F Olshevskii, A G Onofre, A Orava, Risto Orazi, G Österberg, K Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H Papadopoulou, T D Papageorgiou, K Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O Pegoraro, M Peralta, L Perrotta, A Petridou, C Petrolini, A Phillips, H T Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, M E Polok, G Poropat, P Pozdnyakov, V Privitera, P Pukhaeva, N Pullia, Antonio Radojicic, D Ragazzi, S Rahmani, H Ratoff, P N Read, A L Rebecchi, P Redaelli, N G Regler, Meinhard Reid, D Reinhardt, R Renton, P B Resvanis, L K Richard, F Rídky, J Rinaudo, G Røhne, O M Romero, A Ronchese, P Rosenberg, E I Rosinsky, P Roudeau, Patrick Rovelli, T Royon, C Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Yu Sadovskii, A Sajot, G Salt, J Sampsonidis, D Sannino, M Schneider, H Schwemling, P Schwering, B Schwickerath, U Schyns, M A E Scuri, F Seager, P Sedykh, Yu Segar, A M Sekulin, R L Shellard, R C Sheridan, A Siebel, M Simard, L C Simonetto, F Sissakian, A N Smadja, G Smirnov, N Smirnova, O G Smith, G R Solovyanov, O Sopczak, André Sosnowski, R Spassoff, Tz Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stanic, S Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli de Fatis, T Tegenfeldt, F Terranova, F Thomas, J Timmermans, J Tinti, N Tkatchev, L G Todorova-Nová, S Tomaradze, A G Tomé, B Tonazzo, A Tortora, L Tranströmer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Tsirou, A L Turluer, M L Tyapkin, I A Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E van Apeldoorn, G W van Dam, P Van Doninck, W K Van Eldik, J Van Lysebetten, A Van Remortel, N Van Vulpen, I B Vassilopoulos, N Vegni, G Ventura, L Venus, W A Verbeure, F Verlato, M Vertogradov, L S Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, A S Vollmer, C F Voulgaris, G Vrba, V Wahlen, H Walck, C Weiser, C Wicke, D Wickens, J H Wilkinson, G R Winter, M Witek, M Wolf, G Yi, J Yushchenko, O P Zalewska-Bak, A Zalewski, Piotr Zavrtanik, D Zevgolatakos, E Zimin, N I Zucchelli, G C Zumerle, G Phys. Lett. B 10.1016/S0370-2693(99)00671-1 382-96 459 1-3 1999 1999 Measurements of the trilinear gauge boson couplings $WW\gamma$ and $WWZ$ are presented from data taken by DELPHI in 1997 at an energy of 183 GeV. From a study of the reactions $e^+ e^- \to W^+ W^-, e^+ e^- \to We\nu$ and $e^+ e^- \to \nu\nu\gamma$, values are obtained for $\Delta g_{1}^{Z}$ and $\Delta K_{\gamma}$, the differences of the $WWZ$ charge coupling and of the $WW\gamma$ dipole couplings from their Standard Model values, and for $\lambda_{\gamma}$, the $WW\gamma$ quadrupole coupling. The observations are consistent with the predictions of the Standard Model. Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z Alderweireld, T Alekseev, G D Alemany, R Allmendinger, T Allport, P P Almehed, S Amaldi, Ugo Amato, S Anassontzis, E G Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, W D Arnoud, Y Åsman, B Augustin, J E Augustinus, A Baillon, Paul Bambade, P Barão, F Barbiellini, Guido Barbier, R Bardin, Dimitri Yuri Barker, G Baroncelli, A Battaglia, Marco Baubillier, M Becks, K H Begalli, M Beillière, P Belokopytov, Yu A Belous, K S Benvenuti, Alberto C Bérat, C Berggren, M Bertini, D Bertrand, D Besançon, M Bianchi, F Bigi, M Bilenky, S M Bizouard, M A Bloch, D Blom, H M Bonesini, M Bonivento, W Boonekamp, M Booth, P S L Borgland, A W Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, T J V Boyko, I Bozovic, I Bozzo, M Branchini, P Brenke, T Brenner, R A Brückman, P Brunet, J M Bugge, L Buran, T Burgsmüller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V Carena, F Carroll, L Caso, Carlo Castillo-Gimenez, M V Cattai, A Cavallo, F R Chabaud, V Chapkin, M M Charpentier, P Chaussard, L Checchia, P Chelkov, G A Chierici, R Chliapnikov, P V Chochula, P Chorowicz, V Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E Cosme, G Cossutti, F Cowell, J H Crawley, H B Crennell, D J Crépé, S Crosetti, G Cuevas-Maestro, J Czellar, S Davenport, Martyn Da Silva, W Deghorain, A Della Ricca, G Delpierre, P A Demaria, N De Angelis, A de Boer, Wim De Brabandere, S De Clercq, C De Lotto, B De Min, A De Paula, L S Dijkstra, H Di Ciaccio, Lucia Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M Duperrin, A Durand, J D Eigen, G Ekelöf, T J C Ekspong, Gösta Ellert, M Elsing, M Engel, J P Erzen, B Espirito-Santo, M C Falk, E Fanourakis, G K Fassouliotis, D Fayot, J Feindt, Michael Fenyuk, A Ferrari, P Ferrer, A Ferrer-Ribas, E Fichet, S Firestone, A Flagmeyer, U Föth, H Fokitis, E Fontanelli, F Franek, B J Frodesen, A G Frühwirth, R Fulda-Quenzer, F Fuster, J A Galloni, A Gamba, D Gamblin, S Gandelman, M García, C Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, E N Gelé, D Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gómez-Ceballos, G Gonçalves, P González-Caballero, I Gopal, Gian P Gorn, L Górski, M Guz, Yu Gracco, Valerio Grahl, J Graziani, E Green, C Grimm, H J Gris, P Grosdidier, G Grzelak, K Günther, M Guy, J Hahn, F Hahn, S Haider, S Hallgren, A Hamacher, K Hansen, J Harris, F J Hedberg, V Heising, S Hernández, J J Herquet, P Herr, H Hessing, T L Heuser, J M Higón, E Holmgren, S O Holt, P J Hoorelbeke, S Houlden, M A Hrubec, Josef Huet, K Hughes, G J Hultqvist, K Jackson, J N Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B Johansson, E K Jönsson, P E Joram, C Juillot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, E C Keränen, R Kersevan, Borut P Khomenko, B A Khovanskii, N N Kiiskinen, A P King, B J Kinvig, A Kjaer, N J Klapp, O Klein, H Kluit, P M Kokkinias, P Koratzinos, M Kostyukhin, V Kourkoumelis, C Kuznetsov, O Krammer, Manfred Kriznic, E Krstic, J Krumshtein, Z Kubinec, P Kurowska, J Kurvinen, K L Lamsa, J Lane, D W Langefeld, P Lapin, V Laugier, J P Lauhakangas, R Leder, Gerhard Ledroit, F Lefébure, V Leinonen, L Leisos, A Leitner, R Lemonne, J Lenzen, Georg Lepeltier, V Lesiak, T Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Lörstad, B Loken, J G Lopes, J H López, J M López-Fernandez, R Loukas, D Lutz, P Lyons, L MacNaughton, J N Mahon, J R Maio, A Malek, A Malmgren, T G M Malychev, V Marco, J Marco, R P Maréchal, B Margoni, M Marin, J C Mariotti, C Markou, A Martínez-Rivero, C Martínez-Vidal, F Martí i García, S Masik, J Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, Giorgio Mazzucato, F Mazzucato, M McCubbin, M L McKay, R McNulty, R McPherson, G Meroni, C Meyer, W T Migliore, E Mirabito, L Mitaroff, Winfried A Mjörnmark, U Moa, T Moch, M Møller, R Mönig, K Monge, M R Moreau, X Morettini, P Morton, G A Müller, U Münich, K Mulders, M Mulet-Marquis, C Muresan, R Murray, W J Muryn, B Myatt, Gerald Myklebust, T Naraghi, F Navarria, Francesco Luigi Navas, S Nawrocki, K Negri, P Némécek, S Neufeld, N Neumeister, N Nicolaidou, R Nielsen, B S Nikolenko, M Nomokonov, V P Normand, Ainsley Nygren, A Obraztsov, V F Olshevskii, A G Onofre, A Orava, Risto Orazi, G Österberg, K Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H Papadopoulou, T D Papageorgiou, K Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O Pegoraro, M Peralta, L Pernicka, Manfred Perrotta, A Petridou, C Petrolini, A Phillips, H T Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, M E Polok, G Poropat, P Pozdnyakov, V Privitera, P Pukhaeva, N Pullia, Antonio Radojicic, D Ragazzi, S Rahmani, H Rakoczy, D Ratoff, P N Read, A L Rebecchi, P Redaelli, N G Regler, Meinhard Reid, D Reinhardt, R Renton, P B Resvanis, L K Richard, F Rídky, J Rinaudo, G Røhne, O M Romero, A Ronchese, P Rosenberg, E I Rosinsky, P Roudeau, Patrick Rovelli, T Royon, C Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Yu Sadovskii, A Sajot, G Salt, J Sampsonidis, D Sannino, M Schneider, H Schwemling, P Schwickerath, U Schyns, M A E Scuri, F Seager, P Sedykh, Yu Segar, A M Sekulin, R L Shellard, R C Sheridan, A Siebel, M Simard, L C Simonetto, F Sissakian, A N Smadja, G Smirnov, N Smirnova, O G Smith, G R Sopczak, André Sosnowski, R Spassoff, Tz Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli de Fatis, T Tegenfeldt, F Terranova, F Thomas, J Timmermans, J Tinti, N Tkatchev, L G Todorova-Nová, S Tomaradze, A G Tomé, B Tonazzo, A Tortora, L Tranströmer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Tsirou, A L Turluer, M L Tyapkin, I A Tzamarias, S Überschär, B Ullaland, O Uvarov, V Valenti, G Vallazza, E Van der Velde, C van Apeldoorn, G W van Dam, P Van Doninck, W K Van Eldik, J Van Lysebetten, A Van Vulpen, I B Vassilopoulos, N Vegni, G Ventura, L Venus, W A Verbeure, F Verlato, M Vertogradov, L S Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, A S Vollmer, C F Voulgaris, G Vrba, V Wahlen, H Walck, C Weiser, C Wicke, D Wickens, J H Wilkinson, G R Winter, M Witek, M Wolf, G Yi, J Yushchenko, O P Zaitsev, A Zalewska-Bak, A Zalewski, Piotr Zavrtanik, D Zevgolatakos, E Zimin, N I Zucchelli, G C Zumerle, G Eur. Phys. J. C 10.1007/s100520050582 185-199 10 1999 1999 The average lifetime of weakly decaying $b$-baryons was studied using 3.6 million $Z^0$ hadronic decays collected by the DELPHI detector at LEP. The measurement of the proper decay time distribution of secondary vertices was used on three complementary samples. The first sample consisted of events with a fully reconstructed $\Lambda_c^+$ and an opposite charge lepton, or an oppositely charged lepton pair accompanied by a $\Lambda^0$. The other two samples were more inclusive, where $b$-baryon semileptonic decays were recognized by the presence of either a proton identified by the RICH detector or a $\Lambda^0$ and a lepton of charge opposite to that of the proton. The combined result was: \begin{eqnarray*} \tau(b\mathrm{-baryon}) = 1.14\pm0.08 \; (stat)\pm0.04 \; (syst) \; \mathrm{ps} \; . \end{eqnarray*} It updates and replaces all previous results published by the DELPHI collaboration. Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z Alderweireld, T Alekseev, G D Alemany, R Allmendinger, T Allport, P P Almehed, S Amaldi, Ugo Amato, S Anassontzis, E G Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, W D Arnoud, Y Åsman, B Augustin, J E Augustinus, A Baillon, Paul Bambade, P Barão, F Barbier, R Bardin, Dimitri Yuri Barker, G Baroncelli, A Battaglia, Marco Baubillier, M Becks, K H Begalli, M Behrmann, A Beillière, P Belokopytov, Yu A Benvenuti, Alberto C Bérat, C Berggren, M Bertini, D Bertrand, D Besançon, M Bianchi, F Bigi, M Bilenky, S M Bizouard, M A Bloch, D Blom, H M Bonesini, M Bonivento, W Boonekamp, M Booth, P S L Borgland, A W Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, T J V Boyko, I Bozovic, I Bozzo, M Branchini, P Brenke, T Brenner, R A Brückman, P Brunet, J M Bugge, L Buran, T Burgsmüller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V Carena, F Carroll, L Caso, Carlo Castillo-Gimenez, M V Cattai, A Cavallo, F R Chabaud, V Chalanda, N Charpentier, P Chaussard, L Checchia, P Chelkov, G A Chierici, R Chliapnikov, P V Chochula, P Chorowicz, V Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E Cosme, G Cossutti, F Cowell, J H Crawley, H B Crennell, D J Crépé, S Crosetti, G Cuevas-Maestro, J Czellar, S Davenport, Martyn Da Silva, W Deghorain, A Della Ricca, G Delpierre, P A Demaria, N De Angelis, A de Boer, Wim De Brabandere, S De Clercq, C De Lotto, B De Min, A De Paula, L S Dijkstra, H Di Ciaccio, Lucia Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M Duperrin, A Durand, J D Eigen, G Ekelöf, T J C Ekspong, Gösta Ellert, M Elsing, M Engel, J P Erzen, B Espirito-Santo, M C Falk, E Fanourakis, G K Fassouliotis, D Fayot, J Feindt, Michael Fenyuk, A Ferrari, P Ferrer, A Ferrer-Ribas, E Fichet, S Firestone, A Flagmeyer, U Föth, H Fokitis, E Fontanelli, F Franek, B J Frodesen, A G Frühwirth, R Fulda-Quenzer, F Fuster, J A Galloni, A Gamba, D Gamblin, S Gandelman, M García, C Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, E N Gelé, D Gerdyukov, L N Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gómez-Ceballos, G Gonçalves, P González-Caballero, I Gopal, Gian P Gorn, L Górski, M Guz, Yu Gracco, Valerio Grahl, J Graziani, E Green, C Grimm, H J Gris, P Grosdidier, G Grzelak, K Günther, M Guy, J Hahn, F Hahn, S Haider, S Hallgren, A Hamacher, K Hansen, J Harris, F J Hedberg, V Heising, S Hernández, J J Herquet, P Herr, H Hessing, T L Heuser, J M Higón, E Holmgren, S O Holt, P J Hoorelbeke, S Houlden, M A Hrubec, Josef Huet, K Hughes, G J Hultqvist, K Jackson, J N Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B Johansson, E K Jönsson, P E Joram, C Juillot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, E C Keränen, R Kersevan, Borut P Khomenko, B A Khovanskii, N N Kiiskinen, A P King, B J Kinvig, A Kjaer, N J Klapp, O Klein, H Kluit, P M Kokkinias, P Koratzinos, M Kostyukhin, V Kourkoumelis, C Kuznetsov, O Krammer, Manfred Kriznic, E Krumshtein, Z Kubinec, P Kurowska, J Kurvinen, K L Lamsa, J Lane, D W Langefeld, P Lapin, V Laugier, J P Lauhakangas, R Leder, Gerhard Ledroit, F Lefébure, V Leinonen, L Leisos, A Leitner, R Lemonne, J Lenzen, Georg Lepeltier, V Lesiak, T Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Lörstad, B Lokajícek, M Loken, J G Lopes, J H López, J M López-Fernandez, R Loukas, D Lutz, P Lyons, L MacNaughton, J N Mahon, J R Maio, A Malek, A Malmgren, T G M Malychev, V Mandl, F Marco, J Marco, R P Maréchal, B Margoni, M Marin, J C Mariotti, C Markou, A Martínez-Rivero, C Martínez-Vidal, F Martí i García, S Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, Giorgio Masik, J Mazzucato, F Mazzucato, M McCubbin, M L McKay, R McNulty, R McPherson, G Meroni, C Meyer, W T Migliore, E Mirabito, L Mitaroff, Winfried A Mjörnmark, U Moa, T Moch, M Møller, R Mönig, K Monge, M R Moreau, X Morettini, P Morton, G A Müller, U Münich, K Mulders, M Mulet-Marquis, C Muresan, R Murray, W J Muryn, B Myatt, Gerald Myklebust, T Naraghi, F Navarria, Francesco Luigi Navas, S Nawrocki, K Negri, P Neufeld, N Neumeister, N Nicolaidou, R Nielsen, B S Nikolenko, M Nomokonov, V P Normand, Ainsley Nygren, A Obraztsov, V F Olshevskii, A G Onofre, A Orava, Risto Orazi, G Österberg, K Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H Papadopoulou, T D Papageorgiou, K Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O Pegoraro, M Peralta, L Pernicka, Manfred Perrotta, A Petridou, C Petrolini, A Phillips, H T Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, M E Polok, G Poropat, P Pozdnyakov, V Privitera, P Pukhaeva, N Pullia, Antonio Radojicic, D Ragazzi, S Rahmani, H Rakoczy, D Ratoff, P N Read, A L Rebecchi, P Redaelli, N G Regler, Meinhard Reid, D Reinhardt, R Renton, P B Resvanis, L K Richard, F Rídky, J Rinaudo, G Røhne, O M Romero, A Ronchese, P Rosenberg, E I Rosinsky, P Roudeau, Patrick Rovelli, T Royon, C Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Yu Sadovskii, A Sajot, G Salt, J Sampsonidis, D Sannino, M Schneider, H Schwemling, P Schwickerath, U Schyns, M A E Scuri, F Seager, P Sedykh, Yu Segar, A M Sekulin, R L Senko, V A Shellard, R C Sheridan, A Siebel, M Simard, L C Simonetto, F Sissakian, A N Smadja, G Smirnov, N Smirnova, O G Smith, G R Solovyanov, O Sopczak, André Sosnowski, R Spassoff, Tz Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli de Fatis, T Chikilev, O G Tegenfeldt, F Terranova, F Thomas, J Timmermans, J Tinti, N Tkatchev, L G Todorova-Nová, S Tomaradze, A G Tomé, B Tonazzo, A Tortora, L Tranströmer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Tsirou, A L Turluer, M L Tyapkin, I A Tzamarias, S Überschär, B Ullaland, O Uvarov, V Valenti, G Vallazza, E Van der Velde, C van Apeldoorn, G W van Dam, P Van Doninck, W K Van Eldik, J Van Lysebetten, A Van Vulpen, I B Vassilopoulos, N Vegni, G Ventura, L Venus, W A Verbeure, F Verlato, M Vertogradov, L S Verzi, V Vilanova, D Vishnevski, N K Vitale, L Vlasov, E Vodopyanov, A S Vollmer, C F Voulgaris, G Vrba, V Wahlen, H Walck, C Weiser, C Wicke, D Wickens, J H Wilkinson, G R Winter, M Witek, M Wolf, G Yi, J Zalewska-Bak, A Zalewski, Piotr Zavrtanik, D Zevgolatakos, E Zimin, N I Zucchelli, G C Zumerle, G Eur. Phys. J. C 10.1007/s100520050643 383-407 11 3 1999 1999 The data collected with the DELPHI detector at centre-of-mass energies between 130 and 172~$\GeV$, during LEP operation in 1995 and 1996, have been used to determine the hadronic and leptonic cross-sections and leptonic forward--backward asymmetries. In addition the cross-section ratios and forward--backward asymmetries for flavour-tagged samples of light (uds), c and b quarks have been measured. The results are interpreted by performing S-matrix fits to these data and to the data collected previously at the energies near the $\Zzero$ resonance peak (88-93~$\GeV$). The results are also interpreted in terms of contact interactions, which parameterise physics beyond the Standard Model. Further interpretation of the data is made in terms of possible R-parity violating SUSY particles and of possible Z$^{'}$ bosons. No significant deviations from the Standard Model expectations are found and limits are given for the various interpretations which are made of physics beyond the Standard Model. Neumeister, N Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(01)00115-2 254-8 462 1-2 2001 2001 The LHC at CERN will provide proton-proton collisions at a centre-of- mass energy of 14 TeV and a bunch crossing interval of 25 ns. At design luminosity, L=10/sup 14/ cm/sup -2/ s/sup -1/, this will result in an inelastic pp interaction rate of 1 GHz. The CMS experiment will have a multi-level trigger system in order to reduce this rate to about 100 Hz for events written to mass storage. The architecture of the CMS trigger and data acquisition system with emphasis on the high level trigger system is described. (3 refs). Neumeister, N Czechoslov. J. Phys. 10.1007/s10582-000-0007-z 59-68 50 2000 2000 CMS (Compact Muon Solenoid) will be one of two general purpose detectors at the CERN Large Hadron Collider. Its main feature is a strong solenoidal magnetic field. The detector consists of an inner tracker with an embedded pixel detector, a crystal electromagnetic calorimeter, a Cu-scintillator hadron calorimeter and a muon system made up of tracking chambers and special trigger chambers. This paper outlines the design and the status of the CMS experiment. The physics potential of CMS is illustrated using a selected set of physics channels. (3 refs). Russenschuck, Stephan Paul, C Ramberger, S Rodríguez-Mateos, F Wolf, R 10.5170/CERN-1999-001.18 1999 1999 This chapter introduces the main features of the ROXIE program which has been developed for the design of the superconducting magnets for the Large Hadron Collider (LHC) at CERN. The program combines numerical field calculation with a reduced vector-potential formulation, the application of vector-optimization methods, and the use of genetic as well as deterministic minimization algorithms. Together with the applied concept of features, the software is used as an approach towards integrated design of superconducting magnets. The main quadrupole magnet for the LHC, was chosen as an example for the integrated design process. (17 refs). Peck, M A 2000 2000 The present work presents the results of a systematic study of superconducting and structural properties of niobium films sputter deposited onto the inner walls of radiofrequency copper resonators. The measured superconducting quantities include the surface resistance, the critical temperature, the penetration depth and the upper and lower critical fields. In addition to films grown with different discharge gases (Xe, Kr, Ar, Ne and Ar-Ne mixtures) and to films grown on substrates prepared under different conditions, the study also includes massive niobium cavities. The surface resistance is analysed in terms of its dependence on the temperature and on the rf field amplitude and, when possible, compared to theoretical predictions. In general, good agreement with BCS theory is observed. All experimental results are presented in the form of a simple, but adequate parameterisation. The residual resistance is observed to be essentially uncorrelated with the other variables, but strongly dependent on the macroscopic defect density of the copper substrate. Several mechanisms, leading to the generation of a non-zero residual resistance in niobium films are discussed. Electrochemical polishing of the copper resonators before sputter deposition of niobium gives reliably low values of the residual resistance. These values are entirely comparable with those obtained on bulk resonators, defeating any argumentation against the applicability of film cavities for particle accelerators. By comparing the relative merits of the bulk and film technologies, the latter should be preferred in future large-scale applications using superconducting cavities. Knowledge about the film structure is necessary, when discussing the differences of the superconducting properties observed between different types of films. Therefore, niobium films cut from different sites of 1.5GHz resonators, and films, deposited under different conditions on small copper samples are analysed by X-ray diffraction. The films are characterised by measuring the resistivity, the lattice parameter, the texture, the stress and the microstrain. The strong dependence of these properties, especially of the resistivity and the film strain, on the amount of implanted noble gas is evidenced, and the effect of sputter cleaning before deposition is evaluated. It is found that stresses and microstrains of niobium films deposited on oxidised copper are considerably higher than those of films grown on sputter cleaned copper. The dependence of stress on the nature of the substrate can be interpreted by a combined consideration of growth and misfit stresses. The critical temperature is found to be higher than the nominal value of 9.3K of bulk niobium and is observed to depend on the amount of macrostresses present in the material. Films, which had been removed from their substrates, release their elastic stresses and show a transition temperature close to that of the bulk material. The residual resistivity is shown to be determined by the grain size and the presence of microstrains representing crystal imperfections, such as dislocations and embedded noble gas atoms. The mean free path is calculated for different films from the experimentally determined residual resistivity ratio and from measured values of the penetration depth. Excellent agreement between both sets of data is obtained. The upper critical field of the films is independent of the amount of stresses present in their interior and found to take values similar to those measured on bulk niobium with a comparable mean free path. Benvenuti, Cristoforo Calatroni, Sergio Darriulat, Pierre Peck, M A Valente, A M Van't Hof, C A Physica C 10.1016/S0921-4534(01)00284-2 31-9 361 1 2001 2001 The surface resistance of superconducting niobium films induced by the presence of trapped magnetic flux, presumably in the form of a pinned fluxon lattice, is shown to be modified by the presence of a field emitting impurity or defect. The modification takes the form of an additional surface resistance proportional to the density of the fluxon lattice and increasing linearly with the amplitude of the microwave above a threshold significantly lower than the field emission threshold. Such an effect, a precursor of electron emission, is observed for the first time in a study using radiofrequency cavities operating at their fundamental 1.5 GHz frequency. The measured properties of the additional surface resistance severely constrain possible explanations of the observed effect. (23 refs). Arbet-Engels, V P Benvenuti, Cristoforo Calatroni, Sergio Darriulat, Pierre Peck, M A Valente, A M Van't Hof, C A Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(01)00165-6 1-8 463 1-2 2001 2001 Evidence is presented for niobium film cavities performing as well as niobium bulk cavities, at variance with a widespread belief that their much smaller grain size should be a fundamental limitation preventing high quality factors to be maintained over a wide range of accelerating fields. By comparing the relative merits of the bulk and film technologies, a strong case is presented in favour of the latter. (19 refs). Calatroni, Sergio Benvenuti, Cristoforo Darriulat, Pierre Peck, M A Valente, A M Physica C 429-37 351 4 2001 2001 Resistive losses induced by the presence of trapped magnetic flux in niobium superconducting films have been studied using 1.5 GHz microwaves. They are measured to span a very broad spectrum depending on the film-substrate interface and on the gas used in the sputtering discharge. An interpretation in terms of pinning by noble gas clusters is considered. Calatroni, Sergio Benvenuti, Cristoforo Darriulat, Pierre Peck, M A Valente, A M Van't Hof, C A Physica C 421-8 351 4 2001 2001 Potential contributions to the residual surface resistance of niobium films exposed to 1.5 GHz microwaves are reviewed and studied. These include the oxidation of the film surface, the formation of hydride precipitates, the contamination by noble gas atoms and the presence of macroscopic film defects such as those resulting from the roughness of the substrate. Particular attention is given to the dependence of the residual resistance on the amplitude of the microwave. Results similar to those obtained for bulk niobium provide strong evidence against the conjecture that the small size of the film grains should be a fundamental limitation to the production of films having a low residual resistance. Hazen, E Posch, C Kirsch, L Brandenburg, G Nudell, M Oliver, J 10.5170/CERN-2003-006.297 2003 2003 Posch, C Ahlen, S P Hazen, E S Oliver, J 10.5170/CERN-2001-005.199 2001 2001 Reimoser, S A Pavlovic, M Regler, Meinhard 2000 2000 Reimoser, S A Pavlovic, M Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(00)00577-5 390-410 456 3 2001 2001 Beams of carbon ions are particularly well suited for radiotherapy. Their physical properties allow the 3D-conformal tumour irradiation with a sub-millimetre precision, provided that the beam is delivered by a rotating gantry equipped with a pencil-beam scanning system. However, the expected size and weight of such a carbon-ion gantry together with the requirement to direct the beam to the patient with an extreme position accuracy has so far prevented its realisation and stimulated the search for alternative solutions. One of them, the "Riesenrad" ion gantry, is introduced in the present paper. In contrast to conventional isocentric gantries, the main bending magnet of the Riesenrad is placed on the axis of gantry rotation, hence minimising the moment of inertia of the mobile structure and maximising its rigidity. The treatment cabin is smoothly moved towards the desired treatment position by a system that is mechanically de-coupled from the gantry. The engineering design as well as some aspects of the beam transport design of the Riesenrad are presented. Special attention is paid to the assessment of the beam position accuracy in the gantry isocentre as a function of elastic deformations and possible random errors such as temperature fluctuations. The study permits the specification of misalignment tolerances for the beam transport elements of the ion gantry. The most critical alignment error-transversal quadrupole shift-must be lower than 0.1 mm. (31 refs). Chochula, P Antinori, Federico Anelli, G Burns, M Campbell, M Caselle, M Dinapoli, R Elia, D Fini, R A Formenti, F Van Hunen, J J Kapusta, S Kluge, A Krivda, M Lenti, V Manzari, V Meddi, F Morel, M Nilsson, P O Pepato, Adriano Riedler, P Santoro, R Stefanini, G Wyllie, Ken H Nucl. Phys. A 10.1016/S0375-9474(02)01520-8 849c-52c 715 ALICE silicon pixel detector CERN strongly interacting matter nucleus nucleus collisions heavy flavor production vertex resolution high granularity pixel detectors Si 2003 2003 The main physics goal of the ALICE experiment at CERN is study of properties of strongly interacting matter in nucleus-nucleus collisions at, LHC. Measurements of the heavy flavor production require excellent vertex resolution at a very high granularity. The first two layers of the silicon tracking system will be equipped with pixel detectors. In this paper we describe the design of this detector and first results of measurements with detector prototypes. (5 refs). Riedler, P Anelli, G Antinori, Federico Burns, M Banicz, K Caliandro, R Campbell, M Caselle, M Chochula, P Dinapoli, R Easo, S Elia, D Formenti, F Girone, M Gys, Thierry Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(02)02019-3 111-118 501 2003 2003 System prototyping of the ALICE silicon pixel detector (SPD) is well underway. The ALICE SPD consists of two barrel layers with 9.83 million channels in total. These are read out by the ALICE1LHCb pixel chip, which has been developed in a commercial 0.25 mum process with radiation hardening by design layout. The readout chip contains 8192 pixel cells each with a fast analog preamplifier and shaper followed by a discriminator and digital delay lines. Test results show a pixel cell noise of about 110 electrons rms and a mean minimum threshold of about 1000 electrons rms before threshold fine tuning. Several readout chips have been flip-chip bonded to detectors using two different bump-bonding techniques (solder, indium). Results of radioactive source measurements of these assemblies are presented for **9**0Sr and **5**5Fe sources. Several chip-detector assemblies have been tested in a 150 GeV/c pion beam at CERN where an online efficiency of about 99% across a wide range of detector bias and threshold settings was observed. All preliminary investigations confirm the functionality of the chip and the chip-detector assemblies for the ALICE experiment. Anelli, G Burns, M Campbell, M Chochula, P Kluge, A Morel, M Nilsson, P O Riedler, P Stefanini, G Van Hunen, J J Wyllie, Ken H Dinapoli, R 10.5170/CERN-2002-003.164 2002 2002 Rochet, J Rudge, A Doser, Michael Landua, Rolf Riedler, P Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(01)01817-4 316-20 478 1-2 2002 2002 Riedler, P Dabrowski, W Kaplon, J Weilhammer, Peter Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(01)01893-9 104-9 477 1-3 2002 2002 The silicon strip detectors in the ATLAS experiment at LHC will be exposed to very high hadron fluences. In order to study the radiation damage effects ATLAS prototype detectors and small test detectors were irradiated to a fluence of 3 * 10/sup 14/ 24 GeV protons/cm/sup 2/. After irradiation, the detectors were annealed at 25 degrees C to simulate the damage foreseen after 10 years of ATLAS operation. The detectors were then connected to the SCT32A analogue front-end chips and tested with a /sup 106/Ru source. The performance of the irradiated detectors was compared to non-irradiated detectors from the same batch. The charge collection efficiency is discussed taking into account the electronic response of the readout chip and the ballistic deficit. (10 refs). Fujiwara, M.C. Amoretti, M. Amsler, C. Bendiscioli, G. Bonomi, G. Bouchta, A. Bowe, P. Carraro, C. Charlton, M. Collier, M. Doser, M. Filippini, V. Fine, K. Fontana, A. Funakoshi, R. Genova, P. Grögler, D. Hangst, J.S. Hayano, R.S. Higaki, H. Holzscheiter, M.H. Joffrain, W. Jorgensen, L. Lagomarsino, V. Landua, R. Lenz Cesar, C. Lindelöf, D. Lodi Rizzini, E. Macri, M. Madsen, N. Manuzio, G. Marchesotti, M. Montagna, P. Pruys, H. Regenfus, C. Riedler, P. Rotondi, A. Rouleau, G. Salvini, P. Testera, G. van der Werf, D.P. Variola, A. Venturelli, L. Watson, T. Yamazaki, T. Yamazaki, Y. Hyperfine Interact. 10.1023/A:1020819321506 153-8 138 1-4 2001 2001 The ATHENA experiment at the Antiproton Decelerator facility at CERN aims at testing CPT symmetry with antihydrogen. An overview of the experiment, together with preliminary results of development towards the production of slow antihydrogen are reported. Kluge, A Anelli, G Antinori, Federico Bán, J Burns, M Campbell, M Chochula, P Dinapoli, R Formenti, F Van Hunen, J J Krivda, M Lupták, M Meddi, F Morel, M Riedler, P Snoeys, W Stefanini, G Wyllie, Ken H 10.5170/CERN-2001-005.95 2001 2001 Burns, M Antinori, Federico Campbell, M Caselle, M Chochula, P Dinapoli, R Formenti, F Van Hunen, J J Kluge, A Meddi, F Morel, M Riedler, P Snoeys, W Stefanini, G Wyllie, Ken H 10.5170/CERN-2001-005.71 2001 2001 Van Hunen, J J Anelli, G Antinori, Federico Burns, M Banicz, K Campbell, M Caselle, M Caliandro, R Chochula, P Dinapoli, R Easo, S Elia, D Formenti, F Girone, M Gys, Thierry Jusko, A Kluge, A Krivda, M Lenti, V Lupták, M Manzari, V Meddi, F Morel, M Riedler, P Riggi, F Snoeys, W Stefanini, G Wyllie, Ken H 10.5170/CERN-2001-005.85 2001 2001 The Alice1LHCb front-end chip has been designed for the ALICE pixel and the LHCb RICH detectors. It is fabricated in a commercial 0.25 µm CMOS technology, with special design techniques to obtain radiation tolerance. The chip has been irradiated with low energy protons and heavy ions, to determine the cross-section for Single Event Upsets (SEU), and with X-rays to evaluate the sensitivity to total ionising dose. We report the results of those measurements. We also report preliminary results of measurements done with 150 GeV pions at the CERN SPS. Fine, K S Amsler, Claude Bollen, G Cantone, A Carlberg, C B Cesar, C L Charlton, M Collier, M Doser, Michael Eades, John Eklöw, N A Fedele, R Fine, K S Fontana, A Fritioff, T Gemme, G Gorini, G Hangst, J S Hayano, R Hermes, E Holzscheiter, M H Jørgensen, L V Kleppner, D Lagomarsino, V Landua, Rolf Lewis, R A Lodi Rizzini, E Macri, M Manuzio, G Marchesotti, M Merrison, J P Pruys, H S Regenfus, C Riedler, P Rotondi, A Rouleau, G Salvini, P Schuch, R H Smith, G A Testera, G Torelli, G Uggerhøj, Erik Van der Werf, D P Venturelli, L Yamazaki, T Yamazaki, Y Zanello, D Zwahlen, M AIP Conf. Proc. 40-47 498 1999 1999 The ATHENA experiment is being built at CERN to produce and trap neutral antihydrogen. Here we give an overview of the plans to produce antihydrogen. The experiment must (1) trap the antiprotons produced by the CERN accelerators, (2) produce and trap positrons, (3) combine the two charge species into antihydrogen, and finally (4) detect the presence of the antihydrogen. In this paper we discuss how we intend to accomplish each of these steps. (9 refs). Riedler, P AIP Conf. Proc. 10.1063/1.1345382 867-871 549 2000 2000 The ATHENA experiment [2000] is a new experiment at the antiproton decelerator (AD) at CERN. Its goal is the production, detection and spectroscopic investigation of antihydrogen in a magnetostatic trap. The experimental technique used will allow to compare the atomic structure of matter and antimatter to a level of 10/sup -15/ and thus provides a test for CPT conservation. In order to unambiguously detect the annihilation of antihydrogen atoms, a detector system consisting of double sided silicon strip detectors and CsI-crystals was developed. The complete vertex detector has to be operated at 77 K. An overview of the experiment is given and the development of the vertex detector is presented. (4 refs). Nakayama, T Arai, S Hara, K Shimojima, M Ikegami, Y Iwata, Y Johansen, L G Kobayashi, H Kohriki, T Kondo, T Nakano, I Ohsugi, T Riedler, P Roe, S Stapnes, Steinar Stugu, B Takashima, R Tanizaki, K Terada, S Unno, Y Yamamoto, K Yamamura, K IEEE Trans. Nucl. Sci. 10.1109/23.914464 1885-91 47 6, pt.1 2000 2000 Various types of large area silicon microstrip detectors were fabricated for the development of radiation-tolerant detectors that will operate in the LHC ATLAS SCT. The detectors were irradiated with 12-GeV protons at KEK to fluences of 1.7*10/sup 14/ and 4.2*10/sup 14 / protons/cm/sup 2/. Irradiated samples included n-on-n detectors with 4 k Omega cm bulk resistivity and p-on-n detectors with 1 k Omega cm and 4 k Omega cm bulk resistivities. Four patterns of p-stop structures are configured in the n-on-n detectors. Although Hamamatsu fabricated most of the detectors, p-on-n detectors by SINTEF are also included, as well as those fabricated in a modified process by Hamamatsu. The detector performances after irradiation that are compared are the probability of creation of faulty coupling capacitors, C-V characteristics, charge curves, and total leakage current. The p-on-n are similar to the n-on-n detectors in these performances, and will remain operational in the ATLAS radiation environment. (12 refs). Roiser, S 2003 2003 In this thesis a new technique for event data modelling for the LHCb experiment at CERN will be presented. The event model of a high energy physics experiment is one central ingredient of the experiment specific software. A coherent event model has to be shared between algorithms which will use it to process the data in several iterations from the raw data, obtained from the detector, to reconstructed analysable physics quantities. All software applications built on top of the experiment specific software will depend on a proper functioning of the event model. It is expected that with the new Large Hadron Collider, currently in construction at CERN, an unprecedented amount of data, in the order of peta bytes per year, will be retrieved from the different experiments. This data has to be stored according to the event model. Due to the long lifetime of experiments over several decades the consistency and maintenance of a coherent event model has to be guaranteed. Requirements for the description of the event model derive from implementation language constraints, such as object oriented programming techniques, or constraints setup by the experiment itself, like programming rules. In addition it has to be taken into account that new programming techniques or new programming languages for the implementation of the event model may have to be supported in the future. To meet all the requirements a system for event object description was designed. This system requires designers of event objects to provide a single file with the description of their event objects in a high level language. From this description it will be possible to derive the actual implementations of the event objects and other information like their reflection information or documentation about the objects. Several possible outputs for different object oriented implementation languages will be discussed. A high level language for the description of the event model will be proposed. The description language has to be defined as such, that it will be flexible enough to enable future enhancements but also strict enough to be able to constrain the language to a subset of the current features of object oriented programming, as not all of them are required for the description of the event model and may also not be provided in all implementation languages. A discussion of different possibilities for definition languages will elaborate the advantages and shortcomings of the most popular ones. The features of the chosen description language together with its syntax will be presented. When using the tools, several generic and implementation specific rules will be applied, which will be explained. As a practical example for the extension of the event data modelling tools, a software package which supports reflection in C++ was developed. This package is used for tasks like persistence of event data or interactive usage and will be discussed in depth. The tools that have been developed as part of this research work have been evaluated both in terms of description language and usage in the experiment and their integration into the LHCb software build procedure will be explained. The event data modelling tools have been used successfully for several iterations of the description of the LHCb event model. Schlager, Gerolf 2002 2002 The ATLAS detector is a general-purpose experiment for proton-proton collisions designed to investigate the full range of physical processes at the Large Hadron Collider (LHC). The ATLAS Tile Hadron Calorimeter is designed to measure the energies of jets with a resolution of E/E = 50%/pE 3%, for j j<3. This thesis presents the detailed studies which were carried out with prototypes of the Tilecal cooling system during my year as technical student at CERN. The results will be used to validate and to determine the nal design of the cooling system of the ATLAS Tile calorimeter. The performance of the cooling unit built for the calibration of Tilecal modules was evaluated for various parameters like temperature stability and safety conditions during operation. Additionally I contributed to the analysis of the calorimeter response for different cooling temperatures. These results determined the constraints on the operation conditions of the cooling system in terms of temperature stability that will be needed during ATLAS operation. Furthermore I carried out tests to evaluate the effect of ambient temperature on the cooling system and on the foreseen non-isolated cooling pipes. Due to the first test a dependence on ambient temperature was found and could be minimised. The latter test resulted in the nal decision of the type of tube which will be used for the final cooling system. In another test I measured the total power dissipated by the electronics of the Tilecal modules using for the first time final components. I was able to determine the efficiency of the cooling system and the ideal ow rate during real operation conditions. These tests also allowed to better de ne the needs of a cooling system for the ATLAS muon chambers that will be located nearby. For future maintenance purposes of Tilecal I studied the temperature increase inside the Tilecal modules with the cooling disconnected. Additionally I studied the absolute temperatures in the front end electronics of the Tilecal modules during normal operation and without cooling. A special full-scale prototype of the Tilecal cooling system was designed and installed to test the foreseen components, to check the calculations for pressure and ow, to develop the control system and to study the performance stabilitity during several months of operation. I participated in the electrical installation, in the development of the control system and in the analysis of data taken during the operation of the system. Besides I was responsible for the cooling system during the three Tilecal beam calibration periods in 2002. I participated actively in the testbeam program in the form of shifts and helped to implement a monitoring system of the low voltage power supplies and several alarms for the high voltage of the photomultipliers. The results of this thesis are already partially published in an ATLAS internal note [32] and another note will be published in autumn 2002. Antchev, G Cano, E Cittolin, Sergio Erhan, S Faure, B Gigi, D Gutleber, J Jacobs, C Meijers, F Meschi, E Ninane, A Orsini, L Pollet, Lucien Rácz, A Samyn, D Schleifer, W Sinanis, N Sphicas, Paris Comput. Phys. Commun. 10.1016/S0010-4655(01)00264-8 130-8 140 1-2 2001 2001 The data acquisition system for the CMS experiment at the Large Hadron Collider (LHC) will require a large and high performance event building network. Several switch technologies are currently being evaluated in order to compare different architectures for the event builder. One candidate is Myrinet. This paper describes the demonstrator which has been setup to study a small-scale (16*16) event builder based on PCs running Linux connected to Myrinet and Ethernet switches. A detailed study of the Myrinet switch performance has been performed for various traffic conditions, including the behaviour of composite switches. Results from event building studies are presented, including measurements on throughput, overhead and scaling. Traffic shaping techniques have been implemented and the effect on the event building performance has been investigated. The paper reports on performances and maximum event rate obtainable using custom software, not described, for the Myrinet control program and the low-level communication layer implemented in a driver for Linux. A high performance sender is emulated by creating a dummy buffer that remains resident in the network inter-face and moving from the host only the first 64 bytes used by the event building protocol. An approximate scaling in N is presented assuming a balanced system where each source sends on average data to all destinations with the same rate. (5 refs). Antchev, G Cano, E Cittolin, Sergio Erhan, S Funk, W Gigi, D Glege, F Gras, P Gutleber, J Jacobs, C Meijers, F Meschi, E Orsini, L Pollet, Lucien Rácz, A Samyn, D Schleifer, W Sphicas, Paris Schwick, C 10.5170/CERN-2001-005.321 2001 2001 Bottura, L Breschi, M Schneider, M IEEE Trans. Appl. Supercond. 1605-8 11 1.2 2001 2001 The magnetic field in superconducting accelerator magnets has a fine structure with longitudinal periodicity. This periodic pattern, with period identical to the cable twist pitch, is originated by uneven current distribution within the cable. Here we present results of measurements of the periodic pattern performed in an LHC dipole model. We report in particular the results obtained powering the magnet with simple current steps and typical operation cycles as will be used during accelerator operation. The main result of the analysis is the time variation of the amplitude of the periodic pattern, from which we infer the evolution of the current distribution in the cable. We discuss the dependence of the pattern amplitude on ramp and pre-cycle parameters. Haverkamp, M Bottura, L Schneider, M 2000 2000 LHC model magnets have dynamic field imperfections of various nature. Two effects of particular importance are field component decay during injection and ''snapback'' during the first few seconds of acceleration, which happens over typically 15 to 20 mT. The dynamic behaviour of the model magnets was measured as a function of several parameters in the operation cycle and powering history. We demonstrate how the systematic variation of only one single operation cycle parameter can affect the behaviour of the sextupole component. Schnizer, P 2002 2002 Currently the LHC Project at CERN has reached the construction phase. The superconducting magnets of this new accelerator work at superfluid helium temperature. The "arc quadrupoles" (360 pieces), which focus the beam have to be measured at a temperature of 1.9 Kelvin with outstanding precision: The measurement aims to reach a reproducibility of 1.5 · 10^-4 for the field integral, 2 ppm for the harmonic content of the main field and 0.15mm for the position of the axis. A specially developed scanner allows the simultaneous measurement of the field axis and quality. This thesis demonstrates that the system as it stands fulfils the high requirements with respect to the magnetic measurement and the magnetic axis and thus provides the desired unique versatile equipment. The assessment was performed based on experimental results, direct calibration and using a new simulation tool. The main defects treated are mechanical torsion and vibration of moving parts, electrical noise and power supply ripple. Smirnov, N Bottura, L Chiusano, F Dunkel, O Legrand, P Schloss, S Schnizer, P Sievers, P IEEE Trans. Appl. Supercond. 10.1109/TASC.2002.1018732 1688-1692 12 1 2002 2002 More than 400 twin aperture lattice quadrupoles are needed for the Large Hadron Collider (LHC) which is under construction at CERN. The main quadrupole is assembled with correction magnets in a common cryostat called the Short Straight Section (SSS). We plan to measure all SSS's in cold conditions with an unprecedented accuracy: integrated gradient of the field within 150 ppm, harmonics in a range of 1 to 5 ppm, magnetic axis of all elements within 0.1 mm and their field direction within 0.2 mrad. In this paper we describe the automatic measurement system that we have designed, built and calibrated. Based on the results obtained on the two first prototypes of the SSS's (SSS3 and SSS4) we show that this system meets all above requirements. Bottura, L Buzio, M Schnizer, P Smirnov, N IEEE Trans. Appl. Supercond. 10.1109/TASC.2002.1018730 1680-1683 12 1 2002 2002 When investigating the quality of a magnetic measurement system, one observes difficulties to identify the "trouble maker" of such a system as different effects can yield similar influences on the measurement results.We describe a tool in this paper that allows to investigate numerically the effects produced by different imperfections of components of such a system, including, but not limited to vibration and movements of the rotating coil, influence of electrical noise on the system, angular encoder imperfections. This system can simulate the deterministic and stochastic parts of those imperfections. We outline the physical models used that are generally based on experience or first principles. Comparisons to analytical results are shown. The modular structure of the general design of this tool permits to include new modules for new devices and effects. Bottura, L Buzio, M Deferne, G Schnizer, P Sievers, P Smirnov, N IEEE Trans. Appl. Supercond. 10.1109/TASC.2002.1018725 1659-1662 12 1 2002 2002 We discuss the method developed for the verification of alignment of magnetic elements contained in the LHC cryodipole cold mass during series tests at CERN. First, we outline motivations and requirements and then we focus on test strategy, equipment and procedures. Our goal is to express the magnetic field of the dipole and of its associated correctors w.r.t. the reference beam line, not accessible during cryogenic tests. To do so, we use traveling harmonic coil probes ("moles") that allow simultaneous measurement of the field and of the coil position. A laser tracker is used to relate these measurements to fiducials. In the dipole, the axis of the Quadrupole Configured Dipole (QCD) is used as an intermediate reference for the transfer. We provide details on the devices used for measurements in warm and cold conditions, some results from prototypes and pre-series dipoles and an assessment of the precision expected for the series tests. Bottura, L Buzio, M Schnizer, P Smirnov, N Walckiers, L 2000 2000 Beam optics of the LHC accelerator require stringent control of the field quality of the main dipole and quadrupole magnets. The field quality measurements need challenging accuracy given the small size of the aperture (50 mm) : relative strength of the magnets within 2×10-4, harmonics in the ppm range, axis determination within 0.1 mm, main field direction within 0.2 mrad. We present a detailed analysis of the accuracy and reproducibility obtained with the equipment presently available for the qualification tests of the first series magnets. Pugnat, P Schreiner, T Siemko, A IEEE Trans. Appl. Supercond. 10.1109/TASC.2002.1018395 258-261 12 1 2002 2002 The windings of high-field accelerator magnets are usually made of Rutherford-type superconducting cables. The magnetic field distribution along the axis of such magnets exhibits a periodic modulation with a wavelength equal to the twist pitch length of the cable used in the winding. This effect, resulting from quasi-persistent currents, was investigated with a Hall probes array inserted inside the aperture of the LHC superconducting dipoles, both in short models and full-scale prototypes. The amplitude and the time dependence of this periodic field oscillation have been studied as a function of the magnet current history. The origin and the impact on the LHC dipoles stability of the non-uniform current redistribution producing such a field modulation are discussed. Schreiner, T 2002 2002 The windings of high--field superconducting accelerator magnets are usually made of Rutherford--type cables. The magnetic field distribution along the axis of such magnets exhibits a periodic modulation with a wavelength equal to the twist pitch length of the cable used in the winding. Such a Periodic Field Pattern (PFP) has already been observed in number of superconducting accelerator magnets. Additional unbalanced currents in individual strands of the cable appear to be causing this effect. The present thesis describes the investigation of the PFPs performed with a Hall probes array inserted inside the aperture of the LHC superconducting dipoles, both in the small--scale model magnets with a length of one meter and in full--scale prototypes and pre--series magnets with fifteen meters of length. The amplitude and the time dependence of this periodic field oscillation have been studied as a function of the magnet current history. One of the main parameters influencing the properties of the PFP is the cross--contact resistance between the strands of the cable. An estimation for these values is achieved by the so--called Field Advance (FA) measurements performed again with a Hall probes set--up. Due to eddy currents a difference in the field values for the ramp--up and the ramp--down of a current cycle is generated, which is a linear function of the applied ramp rate. The resulting slope is furthermore indirectly proportional to the corresponding cross--contact resistance. Two types of so--called interstrand coupling currents, uniform and non--uniform, are induced by a changing magnetic field and flow not only within the individual strands but also between the strands of the cable. Therefore some parts of the strands can carry a total current which is larger than the transport current. This phenomenon locally reduces the difference between the total strand current and the critical current of the superconductor and can provoke a premature quench of the superconducting magnet, i.e. a transition to the normal state. Considering theoretical models and experimental results the impact of the current distribution on the quench performance of the LHC dipoles is discussed. Finally an estimation for the influence of these currents on the magnet stability with respect to quench during operation conditions is given. Pugnat, P Schreiner, T Siemko, A 2000 2000 The windings of high-field accelerator magnets are usually made of Rutherford-type superconducting cables. The magnetic field distribution along the axis of such magnets exhibits a pronounced periodic modulation with a wavelength equal to the twist pitch length of the cable used in the winding. Such an effect, resulting from quasi-persistent currents, was investigated with a Hall probe array inserted inside the aperture of 1-metre long LHC superconducting dipole models. The amplitude and the time dependence of this periodic field oscillation have been studied as a function of the transport current history. The impact on the magnet stability of the non-uniform current redistribution producing such a field modulation is discussed. Schwarz, Dominik J. Ann. Phys. (Leipzig) 10.1002/andp.200310010 220-270 12 2003 2003 The history of the Universe after its first second is now tested by high quality observations of light element abundances and temperature anisotropies of the cosmic microwave background. The epoch of the first second itself has not been tested directly yet; however, it is constrained by experiments at particle and heavy ion accelerators. Here I attempt to describe the epoch between the electroweak transition and the primordial nucleosynthesis. The most dramatic event in that era is the quark--hadron transition at 10 $\mu$s. Quarks and gluons condense to form a gas of nucleons and light mesons, the latter decay subsequently. At the end of the first second, neutrinos and neutrons decouple from the radiation fluid. The quark--hadron transition and dissipative processes during the first second prepare the initial conditions for the synthesis of the first nuclei. As for the cold dark matter (CDM), WIMPs (weakly interacting massive particles) -- the most popular candidates for the CDM -- decouple from the presently known forms of matter, chemically (freeze-out) at 10 ns and kinetically at 1 ms. The chemical decoupling fixes their present abundances and dissipative processes during and after thermal decoupling set the scale for the very first WIMP clouds. Hossenfelder, Sabine Schwarz, Dominik J. Greiner, Walter Class. Quantum Gravity 10.1088/0264-9381/20/11/325 2337-2354 20 2003 2003 We compute the production of particles from the gravitational field of an expanding mass shell. Contrary to the situation of Hawking radiation and the production of cosmological perturbations during cosmological inflation, the example of an expanding mass shell has no horizon and no singularity. We apply the method of `ray-tracing', first introduced by Hawking, and calculate the energy spectrum of the produced particles. The result depends on three parameters: the expansion velocity of the mass shell, its radius, and its mass. Contrary to the situation of a collapsing mass shell, the energy spectrum is non-thermal. Invoking time reversal we reproduce Hawking's thermal spectrum in a certain limit. Akindinov, A Fonte, Paulo J R Formenti, F Golovine, V Klempt, W Kluge, A Martemyanov, A N Martinengo, P Pinhão, J Smirnitsky, A V Spegel, M Szymanski, P Zalipska, J IEEE Trans. Nucl. Sci. 10.1109/23.960353 1658-1663 48 5 2001 2001 In this paper, we describe the performance of a prototype developed in the context of the ALICE time-of-flight research and development system. The detector module consists of a 32-channel array of 3 x 3 cm2 glass resistive plate chamber (RPC) cells, each of which has four accurately space gaps of 0.3 mm thickness arranged as a pair of double-gap resisitive plate chambers. Operated with a nonflammable gas mixture at atmospheric pressure, the system achieved a time resolution of 90 ps at 98% efficiency with good uniformity and moderate crosstalk. This result shows the feasibility of large-area high-resolution time-of-flight systems based on RPCs at affordable cost. Akindinov, A Anselmo, F Basile, M Cerron-Zeballos, E Cifarelli, Luisa Cindolo, F Choi, J Cozzoni, B De Caro, A De Pasquale, S Kim, D W Kim, N Y Klempt, W Kluge, A Laurenti, G Lee, S C Golovine, V Hatzifotiadou, D Martemyanov, A N Martinengo, P Pesci, A Platner, E D Roberts, J Seganti, A Semak, A A Smirnitsky, A V Spegel, M Szymanski, P Valenti, G Vicinanza, D Williams, M C S Zichichi, A Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(00)00954-2 16-22 456 1-2 2000 2000 The goal of this R&D has been to reach the time resolution needed for time-of-flight detectors using the Multigap Resistive Plate Chamber (MRPC). We present here a MRPC with a time resolution of 70 ps. This prototype has been studied within the R&D program for the very large area TOF array of the ALICE experiment at the CERN LHC. (5 refs). Spegel, M Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(00)00650-1 308-14 453 1-2 2000 2000 The heavy-ion experiment ALICE at the CERN/LHC includes a large surface (~160 m/sup 2/), highly segmented (>10/sup 5/ channels) time- of-flight system for particle identification in the 0.5-1.5 GeV/c range. Recent progress of the related R&D effort on multigap-RPC structures with several thin (~250 mu m) gaps, operated with non- flammable gas mixtures at atmospheric pressure, is presented. The performance of multi-channel prototypes-below 90 ps resolution at more than 95% efficiency-is discussed. (10 refs). Bøggild, H Boissevain, J Conin, L Dodd, J Erazmus, B Esumi, S Fabjan, C.W Fields, D.E Franz, A Hansen, K.H Holzer, E.B Humanic, T.J Jacak, B.V Jayanti, R Kalechofsky, H Lee, Y.Y Leltchouk, M Lörstad, B Maeda, N Martin, L Medvedev, A Miyabayashi, A Murray, M Nishimura, S Paic, G Pandey, S.U Piuz, F Pluta, J Polychronakos, V Potekhin, M Poulard, G Sakaguchi, A Sarabura, M Schmidt-Sørensen, J Spegel, M Simon-Gillo, J Sondheim, W Sugitate, T Sullivan, J.P Sumi, Y van Hecke, H Willis, W.J Wolf, K Xu, N Phys. Lett. B 10.1016/S0370-2693(99)00614-0 181-189 458 1999 1999-07-08 Correlations of two protons emitted near midrapidity in $p$ + Pb collisions at 450 GeV/c and S + Pb collisions at 200 AGeV/c are presented, as measured by the NA44 Experiment. The correlation effect, which arises as a result of final state interactions and Fermi-Dirac statistics, is related to the space-time characteristics of proton emission. The measured source sizes are smaller than the size of the target lead nucleus but larger than the sizes of the projectiles. A dependence on the collision centrality is observed; the source size increases with decreasing impact parameter. Proton source sizes near midrapidity appear to be smaller than those of pions in the same interactions. Quantitative agreement with the results of RQMD (v1.08) simulations is found for $p$ + Pb collisions. For S + Pb collisions the measured correlation effect is somewhat weaker than that predicted by the model simulations, implying either a larger source size or larger contribution of protons from long-lived particle decays. Stockinger, H E Samar, A Muzaffar, S Donno, F Sci. Program. 121-133 10 2 2002 2002 The GDMP client-server software system is a generic file replication tool that replicates files securely and efficiently from one site to another in a Data Grid environment using Globus Grid tools. In addition, it manages replica catalogue entries for file replicas and thus maintains a consistent view on names and locations of replicated files. Files to be transferred can be of any particular file format and GDMP treats them all in the same way. However, for Objectivity database files a particular plug-in exists. All files are assumed to be read-only. 17 Refs. --- 3 --- AN Düllmann, D Hoschek, W Jaén-Martínez, J Segal, B Samar, A Stockinger, H E Stockinger, K 2001 2001 Data grids are currently proposed solutions to large-scale data management problems, including efficient file transfer and replication. Large amounts of data and the world-wide distribution of data stores contribute to the complexity of the data management challenge. Recent architecture proposals and prototypes deal with replication of read-only files but do not address the replica synchronisation problem. We propose a new data grid service, called the Grid Consistency Service (GCS), that sits on top of existing data grid services and allows for replica update synchronisation and consistency maintenance. We give models for different levels of consistency, provided to the Grid user and discuss how they can be included into a replica consistency service for a data grid. (25 refs). Stockinger, H E Samar, A Allcock, B Foster, I Holtman, K Tierney, B L 2001 2001 Data replication is a key issue in a data grid and can be managed in different ways and at different levels of granularity: for example, at the file level or the object level. In the high-energy physics community, data grids are being developed to support the distributed analysis of experimental data. We have produced a prototype data replication tool, the Grid Data Management Pilot (GDMP) that is in production use in one physics experiment, with middleware provided by the Globus toolkit used for authentication, data movement and other purposes. We present a new, enhanced GDMP architecture and prototype implementation that uses Globus data-grid tools for efficient file replication. We also explain how this architecture can address object replication issues in an object-oriented database management system. File transfer over wide-area networks requires specific performance tuning in order to gain optimal data transfer rates. We present performance results obtained with GridFTP, an enhanced version of FTP, and discuss tuning parameters. (37 refs). Aderholz, Michael Amako, K Augé, E Bagliesi, G Banistoni, G Barone, L Boschini, M Brunengo, A Bunn, J J Butler, J Campanella, M Capiluppi, P D'Amato, M Darneri, M Di Mattia, A Dorokhov, A E Gagliardi, F Gaines, I Gasparini, U Ghiselli, A Gordon, J Grandi, C Gálvez, P Harris, F Holtman, K Karimäki, V Karita, Y Klem, J T Legrand, I Leltchouk, M Linglin, D Lubrano, P Luminari, L McArthur, I C Michelotto, M Morita, Y Nazarenko, A Newman, H O'Dell, Vivian O'Neale, S W Osculati, B Pepé, M Perini, L Pinfold, James L Pordes, R Prelz, F Putzer, A Resconi, S Robertson, L Rolli, S Sasaki, T Sato, H Schaffer, R D Schalk, T L Servoli, L Sgaravatto, M Shiers, J Silvestris, L Siroli, G P Sliwa, K Smith, T Somigliana, R Stanescu, C Stockinger, H E Ugolotti, D Valente, E Vistoli, C Wilkinson, R P Willers, Ian Malcolm Williams, D O Comput. Phys. Commun. 10.1016/S0010-4655(01)00280-6 219-25 140 1-2 2001 2001 Most distributed applications are based on architectural models that do not involve real-time knowledge of network status and of their network usage. Moreover the new "network aware" architectures are still under development and their design is not yet complete. We considered, as a use case, an application using ODBMS (Objectivity /DB) for the distributed analysis of experimental data. The dynamic usage of system and network resources at host and application levels has been measured in different client/server configurations, and on several LAN and WAN layouts. The aim was to study the application efficiency and behavior versus the network characteristics and conditions. The most interesting results of the LAN and WAN tests are described. System bottlenecks and limitations have been identified, and efficient working conditions in the different scenarios have been defined. The behavior observed when moving away from the optimal working conditions is also described. Hafeez, M Samar, A Stockinger, H E AIP Conf. Proc. 10.1063/1.1405316 241-243 583 2001 2001 The CMS experiment at CERN is setting up a grid infrastructure required to fulfil the needs imposed by Terabyte scale productions for the next few years. The goal is to automate the production and at the same time allow the users to interact with the system, if required, to make decisions which would optimise performance. We present the architecture, design and functionality of our first working objectivity file replication prototype. The middle-ware of choice is the Globus toolkit that provides promising functionality. Our results prove the ability of the Globus toolkit to be used as an underlying technology for a world-wide Data Grid. The required data management functionality includes high speed file transfers, secure access to remote files, selection and synchronisation of replicas and managing the meta information. The whole system is expected to be flexible enough to incorporate site specific policies. The data management granularity is the file rather than the object level. The first prototype is currently in use for the High Level Trigger (HLT) production (autumn 2000). Owing to these efforts, CMS is one of the pioneers to use the Data Grid functionality in a running production system. The project can be viewed as an evaluator of different strategies, a test for the capabilities of middle-ware tools and a provider of basic Grid functionalities. (10 refs). Hafeez, M Samar, A Stockinger, H E 2001 2001 Morita, Y Aderholz, Michael Amako, K Augé, E Bagliesi, G Barone, L Battistoni, G Boschini, M Brunengo, A Bunn, J J Butler, J Campanella, M Capiluppi, P D'Amato, M Dameri, M Di Mattia, A Dorokhov, A E Gagliardi, F Gaines, I Gasparini, U Ghiselli, A Gordon, J Grandi, C Gálvez, P Harris, F Holtman, K Karimäki, V Karita, Y Klem, J T Legrand, I Leltchouk, M Linglin, D Lubrano, P Luminari, L McArthur, I C Michelotto, M Nazarenko, A Newman, H O'Dell, Vivian O'Neale, S W Osculati, B Pepé, M Perini, L Pinfold, James L Pordes, R Prelz, F Putzer, A Resconi, S Robertson, L Rolli, S Sasaki, T Sato, H Schaffer, R D Schalk, T L Servoli, L Sgaravatto, M Shiers, J Silvestris, L Siroli, G P Sliwa, K Smith, T Somigliana, R Stanescu, C Stockinger, H E Ugolotti, D Valente, E Vistoli, C Wilkinson, R P Willers, Ian Malcolm Williams, D O Comput. Phys. Commun. 10.1016/S0010-4655(01)00266-1 153-61 140 1-2 2001 2001 Holtman, K Stockinger, H E Comput. Phys. Commun. 10.1016/S0010-4655(01)00265-X 146-52 140 1-2 2001 2001 Stockinger, Kurt Bell, W H Cameron, David G Capozza, Luigi Millar, Paul A Zini, Florian 2003 2003 Stockinger, K 2001 2001 Efficient query processing in high-dimensional search spaces is an important requirement for many analysis tools. In the literature on index data structures one can find a wide range of methods for optimising database access. In particular, bitmap indices have recently gained substantial popularity in data warehouse applications with large amounts of read mostly data. Bitmap indices are implemented in various commercial database products and are used for querying typical business applications. However, scientific data that is mostly characterised by non-discrete attribute values cannot be queried efficiently by the techniques currently supported. In this thesis we propose a novel access method based on bitmap indices that efficiently handles multi-dimensional queries against typical scientific data. The algorithm is called GenericRangeEval and is an extension of a bitmap index for discrete attribute values. By means of a cost model we study the performance of queries with various selectivities against uniformly distributed and independent data values. Experimentally we verify our analytical findings and demonstrate that for certain query selectivities the proposed bitmap index shows a significant performance improvement over traditional access methods. Apart from evaluating bitmap indices for synthetic data, we also evaluate this access method based on real data taken from High Energy Physics and Astronomy applications. We thus demonstrate that our approach is not only of theoretical value but also improves the performance of practical applications. In this sense this thesis is a successful proof that multi-dimensional access methods can significantly speed up typical high-dimensional end-user analysis. Stockinger, K Düllmann, D Hoschek, W Schikuta, E 2000 2000 Bitmap indices are popular multi-dimensional data structures for accessing read-mostly data such as data warehouse (DW) applications, decision support systems (DSS) and online analytical processing (OLAP). One of their main strengths is that they provide good performance characteristics for complex adhoc queries and an efficient combination of multiple index dimensions in one query. Considerable research work has been done in the area of finite (and low) attribute cardinalities. However, additional complexity is imposed on the design of bitmap indices for high cardinality or even non-discrete attributes, where different optimisation techniques than the ones proposed so far have to be applied. We discuss the design and implementation of bitmap indices for high-energy physics (HEP) analysis, where the potential search space consists of hundreds of independent dimensions. A single HEP query typically covers 10 to 100 dimensions out of the whole search space. In this context we evaluated two different bitmap encoding techniques, namely equality encoding and range encoding. For both methods the number of bit slices (or bitmap vectors) per attribute is a central optimisation parameter. We present some (first) results for choosing the optimal number of bit slices for multi-dimensional indices with attributes of different value distribution and query selectivity. We believe that this discussion is not only applicable to HEP but also to DW, DSS and CLAP type problems in general. (15 refs). Stockinger, K 2001 2001 Bitmap indices are efficient multi-dimensional index data structures for handling complex adhoc queries in read-mostly environments. They have been implemented in several commercial database systems but are only well suited for discrete attribute values which are very common in typical business applications. However, many scientific applications usually operate on floating point numbers and cannot take advantage of the optimisation techniques offered by current database solutions. We thus present a novel algorithm called Generic RangeEval for processing one-sided range queries over floating point values. In addition, we present a cost model for predicting the performance of bitmap indices for high-dimensional search spaces. We verify our analytical results by a detailed experimental study, and show that the presented bitmap evaluation algorithm scales well also for high-dimensional search spaces requiring only a fairly small index. Because of its simple arithmetic structure, the cost model could easily be integrated into a query optimiser for deciding whether the current multi-dimensional query shall be answered by means of a bitmap index or better by sequentially scanning the data values, without using an index at all. (19 refs). Moreira, P Toifl, T Kluge, A Cervelli, G Faccio, F Marchioro, A Christiansen, J 2000 2000 Gbit/s data transmission links will be used in several LHC detectors in trigger and data acquisition systems. In these experiments, the transmitters will be subject to high radiation doses over the lifetime of the experiments. In this work, a radiation tolerant transmitter ASIC is described. The JC supports two standard protocols, the G-Link and the Gbit-Ethernet, and sustains transmission of data at both 800 Mbit/s and 1.6 Gbit/s. The ASIC was implemented in a mainstream 0.25mum CMOS technology employing radiation tolerant layout practices. A 1.2 Gbit/s prototype with reduced functionality was tested. The ASIC behavior under total dose irradiation as well as its susceptibility to single event upsets was studied and the results are reported here. 12 Refs. Moreira, P Cervelli, G Christiansen, J Faccio, F Kluge, A Marchioro, A Toifl, Thomas H Cachemiche, J P Menouni, M 10.5170/CERN-2001-005.145 2001 2001 In the future LHC experiments, some data acquisition and trigger links will be based on Gbit/s optical fiber networks. In this paper, a configurable radiation tolerant Gbit/s serializer (GOL) is presented that addresses the high-energy physics experiments requirements. The device can operate in four different modes that are a combination of two transmission protocols and two data rates (0.8 Gbit/s and 1.6 Gbit/s). The ASIC may be used as the transmitter in optical links that, otherwise, use only commercial components. The data encoding schemes supported are the CIMT (G-Link) and the 8B/10B (Gbit-Ethernet and Fiber Channel). To guarantee robustness against total dose irradiation effects over the lifetime of the experiments, the IC was fabricated in a standard 0.25 mu m CMOS technology employing radiation tolerant layout practices. The device was exposed to different irradiation sources to test its sensitivity to total dose effects and to single effects upsets. For this tests, a comparison is established with a commercial serializer. (12 refs). 2000 2000 Vincke, Helmut 2000 2000 The LHC, mainly to be used as a proton-proton collider, providing collisions at energies of 14 TeV, will be operational in the year 2005. ATLAS, one of the LHC experiments, will provide high accuracy measurements concerning these p-p collisions. In these collisions also a high particle background is produced. This background was already calculated with the Monte Carlo simulation program FLUKA. Unfortunately, the prediction concerning this background rate is only understood within an uncertainty level of five. The main contribution of this factor can be seen as limited knowledge concerning the ability of FLUKA to simulate these kinds of scenarios. In order to reduce the uncertainty, benchmarking simulations of experiments similar to the ATLAS background situation were performed. The comparison of the simulations with the experiments proves to which extent FLUKA is able to provide reliable results concerning the ATLAS background situation. In order to perform this benchmark, an iron construction was irradiated by a hadron beam. The primary particles had ATLAS equivalent energies. Behind the iron structure, the remnants of the shower processes are measured and simulated. The simulation procedure and its encouraging results, including the comparison with the measured numbers, are presented and discussed in this work. Vincke, H H 2000 2000 Stevenson, G R Vincke, H H 2001 2001 Vincke, H H 1999 1999 Krammer, Manfred Adam, W Berdermann, E Bergonzo, P Bertuccio, G Bogani, F Borchi, E Brambilla, A Bruzzi, Mara Colledani, C Conway, J D'Angelo, P Dabrowski, W Delpierre, P A Dencuville, A Dulinski, W van Eijk, B Fallou, A Fizzotti, F Foulon, F Friedl, M Gan, K K Gheeraert, E Hallewell, G D Han, S Hartjes, F G Hrubec, Josef Husson, D Kagan, H Kania, D R Kaplon, J Kass, R Koeth, T W Lo Giudice, A Lü, R MacLynne, L Manfredotti, C Meier, D Mishina, M Moroni, L Oh, A Pan, L S Pernicka, Manfred Peitz, A Perera, L P Pirollo, S Procario, M Riester, J L Roe, S Rousseau, L Rudge, A Russ, J Sala, S Sampietro, M Schnetzer, S Sciortino, S Stelzer, H Stone, R Suter, B Tapper, R J Tesarek, R Trischuk, W Tromson, D Vittone, E Walsh, A M Wedenig, R Weilhammer, Peter Wetstein, M White, C Zeuner, W Zöller, M Diam. Relat. Mater. 10.1016/S0925-9635(01)00446-0 1778-82 10 9-10 2001 2001 CVD diamond material was used to build position-sensitive detectors for single-charged particles to be employed in high-intensity physics experiments. To obtain position information, metal contacts shaped as strips or pixels are applied to the detector surface for one- or two- dimensional coordinate measurement. Strip detectors 2*4 cm/sup 2/ in size with a strip distance of 50 mu m were tested. Pixel detectors of various pixel sizes were bump bonded to electronics chips and investigated. A key issue for the use of these sensors in high intensity experiments is the radiation hardness. Several irradiation experiments were carried out with pions, protons and neutrons exceeding a fluence of 10/sup 15/ particles/cm/sup 2/. The paper presents an overview of the results obtained with strip and pixel detectors in high-energy test beams and summarises the irradiation studies. (8 refs). Wedenig, R Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(01)01811-3 288-90 478 1-2 2002 2002 Adam, W Berdermann, E Bergonzo, P Bertuccio, G Bognai, F Borchi, E Brambilla, A Bruzzi, Mara Colledani, C Conway, J D'Angelo, P Dabrowski, W Delpierre, P A Deneuville, A Doroshenko, J Dulinski, W van Eijk, B Fallou, A Fizzotti, F Foster, J Foulon, F Friedl, M Gan, K K Gheeraert, E Gobbi, B Grim, G P Hallewell, G D Han, S Hartjes, F G Hrubec, Josef Husson, D Kagan, H Kania, D R Kaplon, J Kass, R Koeth, T W Krammer, Manfred Lander, R Lo Giudice, A Lü, R MacLynne, L Manfredotti, C Meier, D Mishina, M Moroni, L Oh, A Pan, L S Pernicka, Manfred Perera, L P Pirollo, S Plano, R Procario, M Riester, J L Roe, S Rott, C Rousseau, L Rudge, A Russ, J Sala, S Sampietro, M Schnetzer, S Sciortino, S Stelzer, H Stone, R Suter, B Tapper, R J Tesarek, R Trischuk, W Tromson, D Vittone, E Wedenig, R Weilhammer, Peter White, C Zeuner, W Zöller, M Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(01)00358-8 88-91 465 1 2001 2001 Diamond based pixel detectors are a promising radiation-hard technology for use at the LHC. We present first results on a CMS diamond pixel sensor. With a threshold setting of 2000 electrons, an average pixel efficiency of 78% was obtained for normally incident minimum ionizing particles. (3 refs). Conway, J S Adam, W Bauer, C Berdermann, E Bergonzo, P Bogani, F Borchi, E Brambilla, A Bruzzi, Mara Colledani, C Dabrowski, W Da Graca, J Delpierre, P A Deneuville, A Dulinski, W van Eijk, B Fallou, A Fizzotti, F Foulon, F Friedl, M Gan, K K Gheeraert, E Grigoriev, E Hallewell, G D Hall-Wilton, R Han, S Hartjes, F G Hrubec, Josef Husson, D Jamieson, D Kagan, H Kania, D R Kaplon, J Karl, C Kass, R Knöpfle, K T Krammer, Manfred Lo Giudice, A Lü, R Manfredi, P F Manfredotti, C Marshall, R D Meier, D Mishina, M Oh, A Pan, L S Palmieri, V G Pernicka, Manfred Peitz, A Pirollo, S Plano, R Polesello, P Prawer, S Pretzl, Klaus P Procario, M Re, V Riester, J L Roe, S Roff, D G Rudge, A Russ, J Schnetzer, S Sciortino, S Somalwar, S V Speziali, V Stelzer, H Stone, R Suter, B Tapper, R J Tesarek, R Thomson, G B Trawick, M Trischuk, W Vittone, E Walsh, A M Wedenig, R Weilhammer, Peter White, C Ziock, H J Zöller, M 1999 1999 Charged particle detectors made from chemical vapor deposition (CVD) diamond have radiation hardness greatly exceeding that of silicon- based detectors. The CERN-based RD42 Collaboration has developed and tested CVD diamond microstrip and pixel detectors with an eye to their application in the intense radiation environment near the interaction region of hadron colliders. This paper presents recent results from tests of these detectors. (4 refs). Adam, W Bauer, C Berdermann, E Bogani, F Borchi, E Bruzzi, Mara Colledani, C Conway, J Dabrowski, W Delpierre, P A Deneuville, A Dulinski, W van Eijk, B Fallou, A Fisch, D Foulon, F Friedl, M Gan, K K Gheeraert, E Grigoriev, E A Hallewell, G D Hall-Wilton, R Han, S Hartjes, F G Hrubec, Josef Husson, D Kagan, H Kania, D R Kaplon, J Kass, R Knöpfle, K T Krammer, Manfred Manfredi, P F Meier, D Mishina, M Le Normand, F Pan, L S Pernegger, H Pernicka, Manfred Pirollo, S Re, V Riester, J L Roe, S Roff, D G Rudge, A Schnetzer, S R Sciortino, S Speziali, V Stelzer, H Stone, R Tapper, R J Tesarek, R J Thomson, G B Trawick, M L Trischuk, W Turchetta, R Walsh, A M Wedenig, R Weilhammer, Peter Ziock, H J Zoeller, M M 1998 1998 Diamond is a nearly ideal material for detecting ionizing radiation. Its outstanding radiation hardness, fast charge collection and low leakage current allow a diamond detector to be used in high ra diation, high temperature and in aggressive chemical media. We have constructed charged particle detectors using high quality CVD diamond. Characterization of the diamond samples and various detect ors are presented in terms of collection distance, $d=\mu E \tau$, the average distance electron-hole pairs move apart under the influence of an electric field, where $\mu$ is the sum of carrier mo bilities, $E$ is the applied electric field, and $\tau$ is the mobility weighted carrier lifetime. Over the last two years the collection distance increased from $\sim$ 75 $\mu$m to over 200 $\mu$ m. With this high quality CVD diamond a series of micro-strip and pixel particle detectors have been constructed. These devices were tested to determine their position resolution and signal to n oise performance. Diamond detectors were exposed to large fluences of pions, protons and neutrons to establish their radiation hardness properties. The results of these tests and their correlati on with the characterization studies are presented. Frühwirth, R Strandlie, A Todorov, T Winkler, M Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(03)00549-7 702-704 502 2003 2003 Track reconstruction in the LHC environment is characterized by a high background of noise and low-momentum tracks. Adaptive algorithms are able to suppress automatically noise hits and are therefore prime candidates for track fitting at the LHC. They can be implemented by minimizing an energy function (Elastic Arms) or by iterating a recursive least-squares estimator (Deterministic Annealing Filter and Multitrack Filter). We present results from several simulation studies and show that the application of adaptive estimators can lead to substantial gains as compared to standard linear least-squares estimators. 2002 2002 Khanov, A I Lenzi, M Todorov, T Speer, T Vanlaer, P Winkler, M Nucl. Instrum. Methods Phys. Res., A 10.1016/S0168-9002(01)01802-2 460-4 478 1-2 2002 2002 Wittmer, W LHC antisymmetric optics correction efficiency counterrotating proton beams field errors linear curves linear tuning knob luminosity optimisation main collision points quadrupoles 2002 2002 To correct the beta * at the main collision points (IP1 and IP5) simultaneously for the two counterrotating proton beams in the LHC a set of specific quadrupoles in the non-common part of the machine is used. Due to the antisymmetric optics, several quadrupoles on each side of the insertion have to be used. The change in the value of beta * is accomplished by changing the k values of the quadrupoles. This set of increments is referred to as beta * tuning knob. The increments were calculated by rematching beta * in a range of +or- 20 % about the nominal value. Linear curves were fitted to the variation of increments to construct a linear tuning knob. This was done for each plane using MAD 8. The linear behaviour and the orthogonality of the knobs were investigated. Different field errors were introduced in the lattice and the correction efficiency of the knobs were studied. (3 refs). Zerlauth, M Jimeno, A Morpurgo, G Schmidt, R database simulation survey 2002 2002