Dawson, I
Buttar, C M
Mokhov, N V
Moraes, A
Shupe, M A
Predicting the radiation environment at high-luminosity hadron-collider experiments
Nucl. Instrum. Methods Phys. Res., A
219-232
510
The physics requirements of future hadron-collider experiments require very high collision rates, leading to harsh radiation environments never before confronted in large-scale high-energy physics experiments. The high levels of radiation backgrounds becomes a major design criterion for such experiments. Considering the enormous cost and effort involved in building modern high-energy physics experiments, it is vital that particle fluences and energy depositions can be predicted reliably. This is done using Monte-Carlo simulation programs. Given in this paper are the results of comparisons in which the predictions of different simulation programs, all used in the evaluation of radiation backgrounds in the ATLAS and CMS experiments at the CERN Large Hadron Collider, are analysed. Such comparisons give confidence when the predictions agree, and possible cause for further investigation when they disagree.
eng
2003
Imported from Invenio.
Dobbs, M.
Frixione, S.
Laenen, Eric
De Roeck, A.
Tollefson, K.
Andersen, J.R.
Balazs, C.
Banfi, A.
Berge, S.
Bernreuther, W.
Binoth, T.
Brandenburg, A.
Buttar, C.
Cao, Q.H.
Corcella, G.
Cruz, A.
Dawson, I.
Del Duca, V.
Drollinger, V.
Dudko, L.
Eynck, T.
Field, R.
Grazzini, M.
Guillet, J.P.
Heinrich, G.
Huston, J.
Kauer, N.
Kidonakis, Nikolaos
Kulesza, A.
Lassila-Perini, K.
Magnea, Lorenzo
Mahmoudi, F.
Maina, E.
Maltoni, F.
Nolten, M.
Moraes, A.
Moretti, S.
Mrenna, S.
Nadolsky, Pavel M.
Nagy, Z.
Olness, F.
Puljak, I.
Ross, D.A.
Sabio Vera, Agustin
Salam, G.P.
Sherstnev, A.
Si, Z.G.
Sjostrand, T.
Skands, Peter Z.
Thome, E.
Trocsanyi, Z.
Uwer, P.
Weinzierl, S.
Yuan, C.P.
Zanderighi, G.
Les Houches 'Physics at Tev Colliders 2003' QCD/SM Working Group: Summary Report
291-409
This report documents the results obtained by the Working Group on Quantum Chromodynamics and the Standard Model for the Workshop `Physics at TeV Colliders'', Les Houches, France, 26 May - 6 June 2003. After a Monte Guide description, the first contributions report on progress in describing multiple interactions, important for the LHC, and underlying events. An announcement of a Monte Carlo database, under construction, is then followed by a number of contributions improving parton shower descriptions. Subsequently, a large number of contributions address resummations in various forms, after which follow studies of QCD effects in pion pair, top quark pair and photon pair plus jet production. After a study of electroweak corrections to hadronic precision observables, the report ends by presenting recent progress in methods to compute finite order corrections at one-loop with many legs, and at two-loop.
eng
2004
https://lss.fnal.gov/archive/2004/conf/fermilab-conf-04-139-t.pdf;
http://cds.cern.ch/record/722551/files/arXiv:hep-ph_0403100.pdf;
http://cds.cern.ch/record/722551/files/0403100.pdf;
Imported from Invenio.
Buttar, C M
Cindro, V
Dawson, I
Mandic, I
Moraes, A
Estimating induced-activation of SCT barrel-modules in the ATLAS radiation environment.
One of the consequences of operating detector systems in the harsh radiation environments of the ATLAS inner-detector will be radioactivation of the components. If the levels of radioactivity and corresponding dose rates are significant, then there will be implications for any access or maintenance operations. Given in this note are predictions for the radioactivation of SCT barrel-modules in the expected radiation environment of the inner-detector, based on both calculations and measurements. It is shown that both neutron-capture and high-energy hadron reactions must be taken into account. The predictions show that, from a radiological point of view, the SCT barrel-modules should not pose any serious problems.
eng
Activation;
Dose;
Module;
2002
http://documents.cern.ch/cgi-bin/setlink?base=atlnot&categ=Note&id=indet-2002-013;
http://cds.cern.ch/record/685352/files/indet-2002-013.pdf;
http://cds.cern.ch/record/685352/files/indet-2002-013.ps.gz;
Imported from Invenio.
Buttar, C M
Dawson, I
Moraes, A
Estimating induced-activation of SCT barrel-modules
http://documents.cern.ch/cgi-bin/setlink?base=yellowarticle&categ=2001-005&id=p412;
http://cds.cern.ch/record/531640/files/p412.pdf;
Imported from Invenio.
Moraes, A M
Parton distributions at 14 TeV with ATLAS
Nucl. Phys. B, Proc. Suppl.
63-68
133
Accurate measurements at ATLAS will allow perturbative QCD to be tested in an energy regime never probed. Operating at the expected level of precision, ATLAS will measure SM cross sections and QCD related processes at the LHC which will further constrain the parton densities distributions. We present results from simulations of jet studies, direct photon production, Drell-Yan processes and heavy flavour production which indicate the potential to investigate the partonic structure of protons at ATLAS.
eng
ATLAS;
Direct photon production;
Drell-Yan;
Heavy quark production;
Jet physics;
Parton distributions;
2004
http://documents.cern.ch/cgi-bin/setlink?base=atlasconf&categ=slide&id=slide-2003-005;
http://cds.cern.ch/record/685532/files/slide-2003-005.pdf;
http://cds.cern.ch/record/685532/files/slide-2003-005.ppt;
Imported from Invenio.
Moraes, A M
QCD at LHC with ATLAS
The LHC will allow QCD studies to be performed at very high energy, including precision tests and measurements in an as yet unexplored kinematic region. A detailed understanding of QCD is important for almost all physics processes to be studied at the LHC, as the production mechanisms are mostly controlled by QCD. This talk will review various measurements of QCD-related processes to be performed at the LHC, based on final states containing leptons, photons and jets. The kinematic reach and the expected statistical uncertainties will be described for selected examples. The achievable constraints on the parton distribution functions of the proton and a measurement of the strong coupling constant at very large scales will be presented. Where already studied, sources of systematic uncertainties and contributions from background processes are going to be discussed.
eng
direct photon production;
jet physics;
minimum-bias and the underlying event;
parton luminosities;
strong coupling constant;
2003
http://documents.cern.ch/cgi-bin/setlink?base=atlasconf&categ=slide&id=slide-2003-004;
http://cds.cern.ch/record/685477/files/slide-2003-004.pdf;
http://cds.cern.ch/record/685477/files/slide-2003-004.ppt;
Imported from Invenio.
Moraes, A M
Electroweak physics at the LHC with ATLAS
The ATLAS experiment at the LHC has vast potential for electroweak measurements and the 14 TeV center-of-mass energy will in addition allow new regimes of electroweak phenomena to be explored. The extreme brightness (luminosity) of the LHC beam crossings will allow significant improvements in the measurement of the mass of the top quark and the W boson. A significant improvement in the determination of the coupling in three vector boson vertices will be possible. Measurements of the forward- backward asymmetry in Z -> ee decays will provide competitive measurements of the Weinberg angle. Tests of dynamical symmetry breaking will be made from studies of vector boson scattering at high energies which are feasible thanks to the forward jet tagging capabilities of ATLAS. Electroweak single-top production will allow a new direct measurement of V_tb and of the top polarization. This talk will highlight recent electroweak studies performed by ATLAS.
eng
TGC;
W mass;
electroweak mixing angle;
single top quark production;
top quark mass;
2003
http://documents.cern.ch/cgi-bin/setlink?base=atlasconf&categ=slide&id=slide-2003-003;
http://cds.cern.ch/record/685476/files/slide-2003-003.pdf;
http://cds.cern.ch/record/685476/files/slide-2003-003.ppt;
Imported from Invenio.
Moraes, A M
Dawson, I
Buttar, C M
Comparison of predictions for minimum bias event generators and consequences for ATLAS radiation background
This report presents some results for minimum bias events in proton-proton collisions at LHC energies, generated using PYTHIA6.200 and PHOJET1.12 Monte Carlo event generators. Special attention is given to multiplicity distributions, as well as to the cross section predictions provided by both event generators. Our aim is to evaluate the differences in minimum bias predictions from these event generators, which may lead to systematic errors for radiation background calculation performed using transport programs such as FLUKA.
eng
minimum bias;
radiation levels;
2002
http://documents.cern.ch/cgi-bin/setlink?base=atlnot&categ=Note&id=phys-2003-020;
http://cds.cern.ch/record/685356/files/phys-2003-020.pdf;
http://cds.cern.ch/record/685356/files/phys-2003-020.ps.gz;
Imported from Invenio.
Sturrock, R
Bischof, R
Epp, B
Ghete, V M
Kuhn, D
Mello, A G
Caron, B
Vetterli, M C
Karapetian, G V
Martens, K
Agarwal, A
Poffenberger, P R
McPherson, R A
Sobie, R J
Amstrong, S
Benekos, N C
Boisvert, V
Boonekamp, M
Brandt, S
Casado, M P
Elsing, M
Gianotti, F
Goossens, L
Grote, M
Hansen, J B
Mair, K
Nairz, A
Padilla, C
Poppleton, A
Poulard, G
Richter-Was, Elzbieta
Rosati, S
Schörner-Sadenius, T
Wengler, T
Xu, G F
Ping, J L
Chudoba, J
Kosina, J
Lokajícek, M
Svec, J
Tas, P
Hansen, J R
Lytken, E
Nielsen, J L
Wäänänen, A
Tapprogge, Stefan
Calvet, D
Albrand, S
Collot, J
Fulachier, J
Ledroit-Guillon, F
Ohlsson-Malek, F
Viret, S
Wielers, M
Bernardet, K
Corréard, S
Rozanov, A
De Vivie de Régie, J B
Arnault, C
Bourdarios, C
Hrivnác, J
Lechowski, M
Parrour, G
Perus, A
Rousseau, D
Schaffer, A
Unal, G
Derue, F
Chevalier, L
Hassani, S
Laporte, J F
Nicolaidou, R
Pomarède, D
Virchaux, M
Nesvadba, N
Baranov, S
Putzer, A
Khonich, A
Duckeck, G
Schieferdecker, P
Kiryunin, A E
Schieck, J
Lagouri, T
Duchovni, E
Levinson, L
Schrager, D
Negri, G
Bilokon, H
Spogli, L
Barberis, D
Parodi, F
Cataldi, G
Gorini, E
Primavera, M
Spagnolo, S
Cavalli, D
Heldmann, M
Lari, T
Perini, L
Rebatto, D
Resconi, S
Tatarelli, F
Vaccarossa, L
Biglietti, M
Carlino, G
Conventi, F
Doria, A
Merola, L
Polesello, G
Vercesi, V
De Salvo, A
Di Mattia, A
Luminari, L
Nisati, A
Reale, M
Testa, M
Farilla, A
Verducci, M
Cobal, M
Santi, L
Hasegawa, Y
Ishino, M
Mashimo, T
Matsumoto, H
Sakamoto, H
Tanaka, J
Ueda, I
Bentvelsen, Stanislaus Cornelius Maria
Fornaini, A
Gorfine, G
Groep, D
Templon, J
Köster, L J
Konstantinov, A
Myklebust, T
Ould-Saada, F
Bold, T
Kaczmarska, A
Malecki, P
Szymocha, T
Turala, M
Kulchitskii, Yu A
Khoreauli, G
Gromova, N
Tsulaia, V
Minaenko, A A
Rudenko, R
Slabospitskaya, E
Solodkov, A
Gavrilenko, I
Nikitine, N
Sivoklokov, S Yu
Toms, K
Zalite, A
Zalite, Yu
Kervesan, B
Bosman, M
González, S
Sánchez, J
Salt, J
Andersson, N
Nixon, L
Eerola, Paule Anna Mari
Kónya, B
Smirnova, O G
Sandgren, A
Ekelöf, T J C
Ellert, M
Gollub, N
Hellman, S
Lipniacka, A
Corso-Radu, A
Pérez-Réale, V
Lee, S C
CLin, S C
Ren, Z L
Teng, P K
Faulkner, P J W
O'Neale, S W
Watson, A
Brochu, F
Lester, C
Thompson, S
Kennedy, J
Bouhova-Thacker, E
Henderson, R
Jones, R
Kartvelishvili, V G
Smizanska, M
Washbrook, A J
Drohan, J
Konstantinidis, N P
Moyse, E
Salih, S
Loken, J
Baines, J T M
Candlin, D
Candlin, R
Clifft, R
Li, W
McCubbin, N A
George, S
Lowe, A
Buttar, C
Dawson, I
Moraes, A
Tovey, Daniel R
Gieraltowski, J
Malon, D
May, E
LeCompte, T J
Vaniachine, A
Adams, D L
Assamagan, Ketevi A
Baker, R
Deng, W
Fine, V
Fisyak, Yu
Gibbard, B
Ma, H
Nevski, P
Paige, F
Rajagopalan, S
Smith, J
Undrus, A
Wenaus, T
Yu, D
Calafiura, P
Canon, S
Costanzo, D
Hinchliffe, Ian
Lavrijsen, W
Leggett, C
Marino, M
Quarrie, D R
Sakrejda, I
Stravopoulos, G
Tull, C
Loch, P
Youssef, S
Shank, J T
Engh, D
Frank, E
Sen-Gupta, A
Gardner, R
Meritt, F
Smirnov, Y
Huth, J
Grundhoefer, L
Luehring, F C
Goldfarb, S
Severini, H
Skubic, P L
Gao, Y
Ryan, T
De, K
Sosebee, M
McGuigan, P
Ozturk, N
A Step Towards A Computing Grid For The LHC Experiments: ATLAS Data Challenge 1
Nucl. Instrum. Methods Phys. Res., A
The ATLAS Collaboration at CERN is preparing for the data taking and analysis at the LHC that will start in 2007. Therefore, a series of Data Challenges was started in 2002 whose goals are the validation of the Computing Model, of the complete software suite, of the data model, and to ensure the correctness of the technical choices to be made for the final offline computing environment. A major feature of the first Data Challenge (DC1) was the preparation and the deployment of the software required for the production of large event samples as a worldwide distributed activity. It should be noted that it was not an option to "run the complete production at CERN" even if we had wanted to; the resources were not available at CERN to carry out the production on a reasonable time-scale. The great challenge of organising and carrying out this large-scale production at a significant number of sites around the world had therefore to be faced. However, the benefits of this are manifold: apart from realising the required computing resources, this exercise created worldwide momentum for ATLAS computing as a whole. This report describes in detail the main steps carried out in DC1 and what has been learned form them as a step towards a computing Grid for the LHC experiments.
eng
2004
http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=phep-2004-028;
http://cds.cern.ch/record/768285/files/phep-2004-028.pdf;
Imported from Invenio.
Dawson, I
Moraes, A
Buttar, C
Cindro, V
Mandic, I
Radioactivation of silicon tracker modules in high-luminosity hadron collider radiation environments
Nucl. Instrum. Methods Phys. Res., A
422-438
515
One of the consequences of operating detector systems in harsh radiation environments will be radioactivation of the components. This will certainly be true in experiments such as ATLAS and CMS, which are currently being built to exploit the physics potential at CERN's Large Hadron Collider. If the levels of radioactivity and corresponding dose rates are significant, then there will be implications for any access or maintenance operations. This paper presents predictions for the radioactivation of ATLAS's Semi- Conductor Tracker (SCT) barrel system, based on both calculations and measurements. It is shown that both neutron capture and high-energy hadron reactions must be taken into account. The predictions also show that the SCT barrel-module should not pose any serious radiological problems after operation in high radiation environments.
eng
2003
Imported from Invenio.
Clements, D
Buttar, C
Moraes, A
The Effect Of Multiple Interaction Models On The Efficiency Of Vetoes In The VBF Higgs Channel
The efficiencies of vetoes used in the VBF Higgs channel (M(H)=160GeV) were evaluated for events generated using three different multiple interaction models (utilising PYTHIA version 6.221 and ATLFAST 8.0.5). The efficiency of two vetoes: the lepton-acceptance cut and the central jet veto (CJV) showed a dependence on the multiple interaction model used. The efficiency of the lepton-acceptance was found to vary between 58% and 61% whilst the central jet veto (pT>20GeV) varied between 68% and 83% as a function of the multiple interaction model. The effect of changing the Higgs mass (140 < M(H) < 190GeV) on the CJV efficiency was also studied and found to be negligible.
eng
VBF;
Central Jet Veto;
HIGGS;
2005
http://documents.cern.ch/cgi-bin/setlink?base=atlnot&categ=INT&id=phys-int-2006-004;
http://cds.cern.ch/record/865278/files/phys-int-2006-004.pdf;
http://cds.cern.ch/record/865278/files/phys-int-2006-004.ps.gz;
Imported from Invenio.
Moraes, A
Buttar, C
Clements, D
Measuring the underlying event at ATLAS
In this report we investigate measurements of the underlying event in jet events at ATLAS. Reconstructed QCD jet samples in separate pT bins produced for jet calibration (Rome samples) are used in this study. We show that reconstructed track distributions for the underlying event reproduce the MC event generator predictions.
eng
Underlying event,;
Reconstructed data,;
Jets;
QCD;
2005
http://documents.cern.ch/cgi-bin/setlink?base=atlnot&categ=PUB&id=phys-pub-2005-015;
http://cds.cern.ch/record/858510/files/phys-pub-2005-015.pdf;
http://cds.cern.ch/record/858510/files/phys-pub-2005-015.ps.gz;
http://cds.cern.ch/record/858510/files/ue-rome.pdf;
Imported from Invenio.
Dawson, I
Buttar, C
Moraes, A
Minimum bias and the underlying event: towards the LHC
Czechoslov. J. Phys.
A221-A228
54
In this report we investigate the models employed by PYTHIA and PHOJET Monte Carlo event generators used to describe soft interactions in hadron-hadron collisions. The prime aim of this study is to predict minimum bias and underlying event levels of particle production and event activity for the LHC as accurately as these models allow us, thus providing indispensable information for simulations. Focusing on a wide range of measurements dominated by soft interactions in proton-proton and proton-anti-proton collisions, one of the aims of this study is to check the consistency of these models when compared to data and evaluate how efficient their descriptions of low-pT processes are. Based on comparisons to a wide range of minimum bias and underlying event data we present a tuning for PYTHIA6.214 and compare it to other PYTHIA tunings.
eng
Minimum bias;
Underlying event;
Monte Carlo modelling;
LHC predictions;
MCGENERATORS;
2005
http://documents.cern.ch/cgi-bin/setlink?base=atlnot&categ=PUB&id=phys-pub-2005-007;
http://cds.cern.ch/record/827339/files/phys-pub-2005-007.pdf;
Imported from Invenio.
De Roeck, A.
Jung, H.
HERA and the LHC : A Workshop on the Implications of HERA for LHC Physics: CERN, Geneva, Switzerland 26 Mar 2004 - 24 Mar 2005
9290832657
pp.1-326
The HERA electron--proton collider has collected 100 pb$^{-1}$ of data since its start-up in 1992, and recently moved into a high-luminosity operation mode, with upgraded detectors, aiming to increase the total integrated luminosity per experiment to more than 500 pb$^{-1}$. HERA has been a machine of excellence for the study of QCD and the structure of the proton. The Large Hadron Collider (LHC), which will collide protons with a centre-of-mass energy of 14 TeV, will be completed at CERN in 2007. The main mission of the LHC is to discover and study the mechanisms of electroweak symmetry breaking, possibly via the discovery of the Higgs particle, and search for new physics in the TeV energy scale, such as supersymmetry or extra dimensions. Besides these goals, the LHC will also make a substantial number of precision measurements and will offer a new regime to study the strong force via perturbative QCD processes and diffraction. For the full LHC physics programme a good understanding of QCD phenomena and the structure function of the proton is essential. Therefore, in March 2003, a one-year-long workshop started to study the implications of HERA on LHC physics. This included proposing new measurements to be made at HERA, extracting the maximum information from the available data, and developing/improving the theoretical and experimental tools. This report summarizes the results achieved during this workshop.
eng
2005
http://weblib.cern.ch/abstract?CERN-2005-014;
http://www.desy.de/~heralhc;
http://cds.cern.ch/record/711179/files/arXiv:hep-ph_0601013.pdf;
http://cds.cern.ch/record/711179/files/CERN-2005-014.pdf;
http://cds.cern.ch/record/711179/files/0601012.pdf;
http://cds.cern.ch/record/711179/files/0601013.pdf;
Imported from Invenio.
Buttar, C
Dittmaier, S
Drollinger, V
Frixione, Stefano
Nikitenko, A
Abdullin, S W S
Accomando, E
Acosta, D
Arbuzov, A
Ball, R D
Ballestrero, A
Bartalini, P
Baur, U
Belhouari, A
Belov, S
Belyaev, A
Benedetti, D
Binoth, T
Bolognesi, S
Bondarenko, S
Boos, E E
Boudjema, F
Bredenstein, A
Bunichev, V E
Buttar, C
Campbell, J M
Calame, C C
Catani, S
Cavanaugh, R J
Ciccolini, M
Collins, J
Cooper-Sarkar, A M
Corcella, Gennaro
Cucciarelli, S
Davatz, G
Del Duca, V
Denner, A
D'Hondt, J
Drozdetsky, A A
Dudko, L V
Dührssen, M
Frazier, R
Fujimoto, J
Gascon-Shotkin, S
Gehrmann, T
Ridder, A G D
Giammanco, A
Giolo-Nicollerat, Anne Sylvie
Glover, E W N
Godbole, Rohini M
Grau, A
Grazzini, M
Guillet, J P
Gusev, A
Harlander, R
Hegde, R
Marlen-Heinrich, G
Heyninck, J
Huston, J
Ishikawa, T
Kalinowski, A
Kaneko, T
Kato, K
Kauer, N
Kilgore, W
Kirsanov, M
Korytov, A
Krämer, M
Kulesza, A
Kurihara, Y
Lehti, S
Magnea, L
Mahmoudi, F
Maina, E
Maltoni, F
Mariotti, C
Mellado, B
Mercier, D
Mitselmakher, G
Montagna, G
Moraes, A
Moretti, M
Moretti, S
Nakano, I
Nason, P
Nicrosini, O
Nolten, M R
Olness, F
Pakhotin, Y
Pancheri, G
Piccinini, F
Pilon, E
Pittau, R
Pozzorini, Stefano
Pumplin, J
Quayle, W
Les Houches Physics at TeV Colliders 2005, Standard Model and Higgs working group: Summary report
This Report summarises the activities of the "SM and Higgs" working group for the Workshop "Physics at TeV Colliders", Les Houches, France, 2-20 May, 2005. On the one hand, we performed a variety of experimental and theoretical studies on standard candles (such as W, Z, and ttbar production), treating them either as proper signals of known physics, or as backgrounds to unknown physics; we also addressed issues relevant to those non-perturbative or semi-perturbative ingredients, such as Parton Density Functions and Underlying Events, whose understanding will be crucial for a proper simulation of the actual events taking place in the detectors. On the other hand, several channels for the production of the Higgs, or involving the Higgs, have been considered in some detail. The report is structured into four main parts. The first one deals with Standard Model physics, except the Higgs. A variety of arguments are treated here, from full simulation of processes constituting a background to Higgs production, to studies of uncertainties due to PDFs and to extrapolations of models for underlying events, from small-$x$ issues to electroweak corrections which may play a role in vector boson physics. The second part of the report treats Higgs physics from the point of view of the signal. In the third part, reviews are presented on the current status of multi-leg, next-to-leading order and of next-to-next-to-leading order QCD computations. Finally, the fourth part deals with the use of Monte Carlos for simulation of LHC physics.
eng
2005
http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ph&id=0604120;
http://cds.cern.ch/record/942294/files/0604120.pdf;
Imported from Invenio.
Moraes, A
Buttar, C
Clements, D
Skillicorn, I O
Preparing for measurements of dijet azimuthal decorrelations at ATLAS
Dijet azimuthal decorrelations are investigated in this report. We present a study on how well the event generators PYTHIA, HERWIG and HERWIG+JIMMY describe some of the recent measurements on dijet azimuthal decorrelations made by D0. We predict the correlations in the azimuthal angle between the two largest transverse momentum jets in the central rapidity for LHC inclusive dijet event samples. Reconstructed dijet azimuthal decorrelation distributions for simulated jet events at ATLAS (Rome samples) are shown to reproduce the MC event generator predictions.
eng
jets, azimuthal decorrelation, reconstructed events;
QCD;
2005
http://documents.cern.ch/cgi-bin/setlink?base=atlnot&categ=PUB&id=phys-pub-2006-013;
http://cds.cern.ch/record/916828/files/phys-pub-2006-013.pdf;
http://cds.cern.ch/record/916828/files/phys-pub-2006-013.ps.gz;
Imported from Invenio.