Phys. Lett. B Phys. Lett. B Inclusive Charged Hadron Production in Two-Photon Collisions at LEP Achard P. Adriani O. Aguilar-Benitez M. Alcaraz J. Alemanni G. Allaby J. Aloisio A. Alviggi M.G. Anderhub H. Andreev Valery P. Anselmo F. Arefev A. Azemoon T. Aziz T. Bagnaia P. Bajo A. Baksay G. Baksay L. Baldew S.V. Banerjee S. Banerjee Sw. Barczyk A. Barillere R. Bartalini P. Basile M. Batalova N. Battiston R. Bay A. Becattini F. Becker U. Behner F. Bellucci L. Berbeco R. Berdugo J. Berges P. Bertucci B. Betev B.L. Biasini M. Biglietti M. Biland A. Blaising J.J. Blyth S.C. Bobbink G.J. Bohm A. Boldizsar L. Borgia B. Bottai S. Bourilkov D. Bourquin M. Braccini S. Branson J.G. Brochu F. Burger J.D. Burger W.J. Cai X.D. Capell M. Cara Romeo G. Carlino G. Cartacci A. Casaus J. Cavallari F. Cavallo N. Cecchi C. Cerrada M. Chamizo M. Chang Y.H. Chemarin M. Chen A. Chen G. Chen G.M. Chen H.F. Chen H.S. Chiefari G. Cifarelli L. Cindolo F. Clare I. Clare R. Coignet G. Colino N. Costantini S. de la Cruz B. Cucciarelli S. van Dalen J.A. de Asmundis R. Deglon P. Debreczeni J. Degre A. Dehmelt K. Deiters K. della Volpe D. Delmeire E. Denes P. DeNotaristefani F. De Salvo A. Diemoz M. Dierckxsens M. Dionisi C. Dittmar M. Doria A. Dova M.T. Duchesneau D. Duda M. Echenard B. Eline A. El Hage A. El Mamouni H. Engler A. Eppling F.J. Extermann P. Falagan M.A. Falciano S. Favara A. Fay J. Fedin O. Felcini M. Zurich, ETH Ferguson T. Fesefeldt H. Fiandrini E. Field J.H. Filthaut F. Fisher P.H. Fisher W. Fisk I. Forconi G. Freudenreich K. Furetta C. Galaktionov Iouri Ganguli S.N. Garcia-Abia Pablo Gataullin M. Gentile S. Giagu S. Gong Z.F. Grenier Gerald Jean Grimm O. Gruenewald M.W. Guida M. van Gulik R. Gupta V.K. Gurtu A. Gutay L.J. Haas D. Hakobyan R.S. Hatzifotiadou D. Hebbeker T. Herve Alain Hirschfelder J. Hofer H. Hohlmann M. Holzner G. Hou S.R. Hu Y. Jin B.N. Jones Lawrence W. de Jong P. Josa-Mutuberria I. Kafer D. Kaur M. Kienzle-Focacci M.N. Kim J.K. Kirkby Jasper Kittel W. Klimentov A. Konig A.C. Kopal M. Koutsenko V. Kraber M. Kraemer R.W. Kruger A. Kunin A. Ladron de Guevara P. Laktineh I. Landi G. Lebeau M. Lebedev A. Lebrun P. Lecomte P. Lecoq P. Le Coultre P. Le Goff J.M. Leiste R. Levtchenko M. Levtchenko P. Li C. Likhoded S. Lin C.H. Lin W.T. Linde F.L. Lista L. Liu Z.A. Lohmann W. Longo E. Lu Y.S. Luci C. Luminari L. Lustermann W. Ma W.G. Malgeri L. Malinin A. Mana C. Mangeol D. Mans J. Martin J.P. Marzano F. Mazumdar K. McNeil R.R. Mele S. Merola L. Meschini M. Metzger W.J. Mihul A. Milcent H. Mirabelli G. Mnich J. Mohanty G.B. Muanza G.S. Muijs A.J.M. Musicar B. Musy M. Nagy S. Natale S. Napolitano M. Nessi-Tedaldi F. Newman H. Nisati A. Kluge Hannelies Ofierzynski R. Organtini G. Palomares C. Paolucci P. Paramatti R. Passaleva G. Patricelli S. Paul Thomas Cantzon Pauluzzi M. Paus C. Pauss F. Pedace M. Pensotti S. Perret-Gallix D. Petersen B. Piccolo D. Pierella F. Pioppi M. Piroue P.A. Pistolesi E. Plyaskin V. Pohl M. Pojidaev V. Pothier J. Prokofev D.O. Prokofiev D. Quartieri J. Rahal-Callot G. Rahaman M.A. Raics P. Raja N. Ramelli R. Rancoita P.G. Ranieri R. Raspereza A. Razis P. Ren D. Rescigno M. Reucroft S. Riemann S. Riles Keith Roe B.P. Romero L. Rosca A. Rosier-Lees S. Roth Stefan Rosenbleck C. Roux B. Rubio J.A. Ruggiero G. Rykaczewski H. Sakharov A. Saremi S. Sarkar S. Salicio J. Sanchez E. Sanders M.P. Schafer C. Schegelsky V. Schopper H. Schotanus D.J. Sciacca C. Servoli L. Shevchenko S. Shivarov N. Shoutko V. Shumilov E. Shvorob A. Son D. Souga C. Spillantini P. Steuer M. Stickland D.P. Stoyanov B. Straessner A. Sudhakar K. Sultanov G. Sun L.Z. Sushkov S. Suter H. Swain J.D. Szillasi Z. Tang X.W. Tarjan P. Tauscher L. Taylor L. Tellili B. Teyssier D. Timmermans Charles Ting Samuel C.C. Ting S.M. Tonwar S.C. Toth J. Tully C. Tung K.L. Ulbricht J. Valente E. Van de Walle R.T. Vasquez R. Veszpremi V. Vesztergombi G. Vetlitsky I. Vicinanza D. Viertel G. Villa S. Vivargent M. Vlachos S. Vodopianov I. Vogel H. Vogt H. Vorobev I. Vorobyov A.A. Wadhwa M. Wang X.L. Wang Z.M. Weber M. Wienemann P. Wilkens H. Wynhoff S. Xia L. Xu Z.Z. Yamamoto J. Yang B.Z. Yang C.G. Yang H.J. Yang M. Yeh S.C. Zalite A. Zalite Yu. Zhang Z.P. Zhao J. Zhu G.Y. Zhu R.Y. Zhuang H.L. Zichichi A. Zimmermann B. Zoller M. 2003 554 105 14 Inclusive charged hadron production, $ m{e}^{+} m{e}^{-} ightarrow m{e}^{+} m{e}^{-}$ h$^{pm}$ X, is studied using 414 pb$^{-1}$ of data collected at LEP with the L3 detector at centre-of-mass energies between 189 and 202 GeV. Single particle inclusive differential cross sections are measured as a function of the particle transverse momentum, $p_t$, and pseudo-rapidity, $eta$. For $ p_t le 1.5$ GeV, the data are well described by an exponential, typical of soft hadronic processes. For higher $p_t$, the onset of perturbative QCD processes is observed. The $pi^{pm}$ production cross section for $p_t > 5$ GeV is much higher than the NLO QCD predictions. research-article

Draft Agenda 1969 SPC

Phys. Lett. B Phys. Lett. B Measurement of W Polarisation at LEP Achard P. Adriani O. Aguilar-Benitez M. Alcaraz J. Alemanni G. Allaby J. Aloisio A. Alviggi M.G. Anderhub H. Andreev Valery P. Anselmo F. Arefev A. Azemoon T. Aziz T. Bagnaia P. Bajo A. Baksay G. Baksay L. Baldew S.V. Banerjee S. Banerjee Sw. Barczyk A. Barillere R. Bartalini P. Basile M. Batalova N. Battiston R. Bay A. Becattini F. Becker U. Behner F. Bellucci L. Berbeco R. Berdugo J. Berges P. Bertucci B. Betev B.L. Biasini M. Biglietti M. Biland A. Blaising J.J. Blyth S.C. Bobbink G.J. Bohm A. Boldizsar L. Borgia B. Bottai S. Bourilkov D. Bourquin M. Braccini S. Branson J.G. Brochu F. Burger J.D. Burger W.J. Cai X.D. Capell M. Cara Romeo G. Carlino G. Cartacci A. Casaus J. Cavallari F. Cavallo N. Cecchi C. Cerrada M. Chamizo M. Chang Y.H. Chemarin M. Chen A. Chen G. Chen G.M. Chen H.F. Chen H.S. Chiefari G. Cifarelli L. Cindolo F. Clare I. Clare R. Coignet G. Colino N. Costantini S. de la Cruz B. Cucciarelli S. van Dalen J.A. de Asmundis R. Deglon P. Debreczeni J. Degre A. Dehmelt K. Deiters K. della Volpe D. Delmeire E. Denes P. DeNotaristefani F. De Salvo A. Diemoz M. Dierckxsens M. Dionisi C. Dittmar M. Doria A. Dova M.T. Duchesneau D. Duda M. Echenard B. Eline A. El Hage A. El Mamouni H. Engler A. Eppling F.J. Extermann P. Falagan M.A. Falciano S. Favara A. Fay J. Fedin O. Felcini M. Zurich, ETH Ferguson T. Fesefeldt H. Fiandrini E. Field J.H. Filthaut F. Fisher P.H. Fisher W. Fisk I. Forconi G. Freudenreich K. Furetta C. Galaktionov Iouri Ganguli S.N. Garcia-Abia Pablo Gataullin M. Gentile S. Giagu S. Gong Z.F. Grenier Gerald Jean Grimm O. Gruenewald M.W. Guida M. van Gulik R. Gupta V.K. Gurtu A. Gutay L.J. Haas D. Hakobyan R.S. Hatzifotiadou D. Hebbeker T. Herve Alain Hirschfelder J. Hofer H. Hohlmann M. Holzner G. Hou S.R. Hu Y. Jin B.N. Jones Lawrence W. de Jong P. Josa-Mutuberria I. Kafer D. Kaur M. Kienzle-Focacci M.N. Kim J.K. Kirkby Jasper Kittel W. Klimentov A. Konig A.C. Kopal M. Koutsenko V. Kraber M. Kraemer R.W. Kruger A. Kunin A. Ladron de Guevara P. Laktineh I. Landi G. Lebeau M. Lebedev A. Lebrun P. Lecomte P. Lecoq P. Le Coultre P. Le Goff J.M. Leiste R. Levtchenko M. Levtchenko P. Li C. Likhoded S. Lin C.H. Lin W.T. Linde F.L. Lista L. Liu Z.A. Lohmann W. Longo E. Lu Y.S. Luci C. Luminari L. Lustermann W. Ma W.G. Malgeri L. Malinin A. Mana C. Mangeol D. Mans J. Martin J.P. Marzano F. Mazumdar K. McNeil R.R. Mele S. Merola L. Meschini M. Metzger W.J. Mihul A. Milcent H. Mirabelli G. Mnich J. Mohanty G.B. Muanza G.S. Muijs A.J.M. Musicar B. Musy M. Nagy S. Natale S. Napolitano M. Nessi-Tedaldi F. Newman H. Nisati A. Kluge Hannelies Ofierzynski R. Organtini G. Palomares C. Paolucci P. Paramatti R. Passaleva G. Patricelli S. Paul Thomas Cantzon Pauluzzi M. Paus C. Pauss F. Pedace M. Pensotti S. Perret-Gallix D. Petersen B. Piccolo D. Pierella F. Pioppi M. Piroue P.A. Pistolesi E. Plyaskin V. Pohl M. Pojidaev V. Pothier J. Prokofev D.O. Prokofiev D. Quartieri J. Rahal-Callot G. Rahaman M.A. Raics P. Raja N. Ramelli R. Rancoita P.G. Ranieri R. Raspereza A. Razis P. Ren D. Rescigno M. Reucroft S. Riemann S. Riles Keith Roe B.P. Romero L. Rosca A. Rosier-Lees S. Roth Stefan Rosenbleck C. Roux B. Rubio J.A. Ruggiero G. Rykaczewski H. Sakharov A. Saremi S. Sarkar S. Salicio J. Sanchez E. Sanders M.P. Schafer C. Schegelsky V. Schopper H. Schotanus D.J. Sciacca C. Servoli L. Shevchenko S. Shivarov N. Shoutko V. Shumilov E. Shvorob A. Son D. Souga C. Spillantini P. Steuer M. Stickland D.P. Stoyanov B. Straessner A. Sudhakar K. Sultanov G. Sun L.Z. Sushkov S. Suter H. Swain J.D. Szillasi Z. Tang X.W. Tarjan P. Tauscher L. Taylor L. Tellili B. Teyssier D. Timmermans Charles Ting Samuel C.C. Ting S.M. Tonwar S.C. Toth J. Tully C. Tung K.L. Ulbricht J. Valente E. Van de Walle R.T. Vasquez R. Veszpremi V. Vesztergombi G. Vetlitsky I. Vicinanza D. Viertel G. Villa S. Vivargent M. Vlachos S. Vodopianov I. Vogel H. Vogt H. Vorobev I. Vorobyov A.A. Wadhwa M. Wang X.L. Wang Z.M. Weber M. Wienemann P. Wilkens H. Wynhoff S. Xia L. Xu Z.Z. Yamamoto J. Yang B.Z. Yang C.G. Yang H.J. Yang M. Yeh S.C. Zalite A. Zalite Yu. Zhang Z.P. Zhao J. Zhu G.Y. Zhu R.Y. Zhuang H.L. Zichichi A. Zimmermann B. Zoller M. 2003 557 147 156 The three different helicity states of W bosons produced in the reaction e+ e- -> W+ W- -> l nu q q~ at LEP are studied using leptonic and hadronic W decays. Data at centre-of-mass energies \sqrt s = 183-209 GeV are used to measure the polarisation of W bosons, and its dependence on the W boson production angle. The fraction of longitudinally polarised W bosons is measured to be 0.218 \pm 0.027 \pm 0.016 where the first uncertainty is statistical and the second systematic, in agreement with the Standard Model expectation. research-article

Phys. Lett. B Phys. Lett. B Study of the $e^{+}e^{-}\to Ze^{+}e^{-}$ Process at LEP Achard P. Adriani O. Aguilar-Benitez M. Alcaraz J. Alemanni G. Allaby J. Aloisio A. Alviggi M.G. Anderhub H. Andreev Valery P. Anselmo F. Arefev A. Azemoon T. Aziz T. Bagnaia P. Bajo A. Baksay G. Baksay L. Baldew S.V. Banerjee S. Banerjee Sw. Barczyk A. Barillere R. Bartalini P. Basile M. Batalova N. Battiston R. Bay A. Becattini F. Becker U. Behner F. Bellucci L. Berbeco R. Berdugo J. Berges P. Bertucci B. Betev B.L. Biasini M. Biglietti M. Biland A. Blaising J.J. Blyth S.C. Bobbink G.J. Bohm A. Boldizsar L. Borgia B. Bottai S. Bourilkov D. Bourquin M. Braccini S. Branson J.G. Brochu F. Burger J.D. Burger W.J. Cai X.D. Capell M. Cara Romeo G. Carlino G. Cartacci A. Casaus J. Cavallari F. Cavallo N. Cecchi C. Cerrada M. Chamizo M. Chang Y.H. Chemarin M. Chen A. Chen G. Chen G.M. Chen H.F. Chen H.S. Chiefari G. Cifarelli L. Cindolo F. Clare I. Clare R. Coignet G. Colino N. Costantini S. de la Cruz B. Cucciarelli S. van Dalen J.A. de Asmundis R. Deglon P. Debreczeni J. Degre A. Dehmelt K. Deiters K. della Volpe D. Delmeire E. Denes P. DeNotaristefani F. De Salvo A. Diemoz M. Dierckxsens M. Dionisi C. Dittmar M. Doria A. Dova M.T. Duchesneau D. Duda M. Echenard B. Eline A. El Hage A. El Mamouni H. Engler A. Eppling F.J. Extermann P. Falagan M.A. Falciano S. Favara A. Fay J. Fedin O. Felcini M. Zurich, ETH Ferguson T. Fesefeldt H. Fiandrini E. Field J.H. Filthaut F. Fisher P.H. Fisher W. Fisk I. Forconi G. Freudenreich K. Furetta C. Galaktionov Iouri Ganguli S.N. Garcia-Abia Pablo Gataullin M. Gentile S. Giagu S. Gong Z.F. Grenier Gerald Jean Grimm O. Gruenewald M.W. Guida M. van Gulik R. Gupta V.K. Gurtu A. Gutay L.J. Haas D. Hakobyan R.S. Hatzifotiadou D. Hebbeker T. Herve Alain Hirschfelder J. Hofer H. Hohlmann M. Holzner G. Hou S.R. Hu Y. Jin B.N. Jones Lawrence W. de Jong P. Josa-Mutuberria I. Kafer D. Kaur M. Kienzle-Focacci M.N. Kim J.K. Kirkby Jasper Kittel W. Klimentov A. Konig A.C. Kopal M. Koutsenko V. Kraber M. Kraemer R.W. Kruger A. Kunin A. Ladron de Guevara P. Laktineh I. Landi G. Lebeau M. Lebedev A. Lebrun P. Lecomte P. Lecoq P. Le Coultre P. Le Goff J.M. Leiste R. Levtchenko M. Levtchenko P. Li C. Likhoded S. Lin C.H. Lin W.T. Linde F.L. Lista L. Liu Z.A. Lohmann W. Longo E. Lu Y.S. Luci C. Luminari L. Lustermann W. Ma W.G. Malgeri L. Malinin A. Mana C. Mangeol D. Mans J. Martin J.P. Marzano F. Mazumdar K. McNeil R.R. Mele S. Merola L. Meschini M. Metzger W.J. Mihul A. Milcent H. Mirabelli G. Mnich J. Mohanty G.B. Muanza G.S. Muijs A.J.M. Musicar B. Musy M. Nagy S. Natale S. Napolitano M. Nessi-Tedaldi F. Newman H. Nisati A. Kluge Hannelies Ofierzynski R. Organtini G. Palomares C. Paolucci P. Paramatti R. Passaleva G. Patricelli S. Paul Thomas Cantzon Pauluzzi M. Paus C. Pauss F. Pedace M. Pensotti S. Perret-Gallix D. Petersen B. Piccolo D. Pierella F. Pioppi M. Piroue P.A. Pistolesi E. Plyaskin V. Pohl M. Pojidaev V. Pothier J. Prokofev D.O. Prokofiev D. Quartieri J. Rahal-Callot G. Rahaman M.A. Raics P. Raja N. Ramelli R. Rancoita P.G. Ranieri R. Raspereza A. Razis P. Ren D. Rescigno M. Reucroft S. Riemann S. Riles Keith Roe B.P. Romero L. Rosca A. Rosier-Lees S. Roth Stefan Rosenbleck C. Roux B. Rubio J.A. Ruggiero G. Rykaczewski H. Sakharov A. Saremi S. Sarkar S. Salicio J. Sanchez E. Sanders M.P. Schafer C. Schegelsky V. Schopper H. Schotanus D.J. Sciacca C. Servoli L. Shevchenko S. Shivarov N. Shoutko V. Shumilov E. Shvorob A. Son D. Souga C. Spillantini P. Steuer M. Stickland D.P. Stoyanov B. Straessner A. Sudhakar K. Sultanov G. Sun L.Z. Sushkov S. Suter H. Swain J.D. Szillasi Z. Tang X.W. Tarjan P. Tauscher L. Taylor L. Tellili B. Teyssier D. Timmermans Charles Ting Samuel C.C. Ting S.M. Tonwar S.C. Toth J. Tully C. Tung K.L. Ulbricht J. Valente E. Van de Walle R.T. Vasquez R. Veszpremi V. Vesztergombi G. Vetlitsky I. Vicinanza D. Viertel G. Villa S. Vivargent M. Vlachos S. Vodopianov I. Vogel H. Vogt H. Vorobev I. Vorobyov A.A. Wadhwa M. Wang X.L. Wang Z.M. Weber M. Wienemann P. Wilkens H. Wynhoff S. Xia L. Xu Z.Z. Yamamoto J. Yang B.Z. Yang C.G. Yang H.J. Yang M. Yeh S.C. Zalite A. Zalite Yu. Zhang Z.P. Zhao J. Zhu G.Y. Zhu R.Y. Zhuang H.L. Zichichi A. Zimmermann B. Zoller M. 2003 561 73 81 The cross section of the process $\rm e^+e^-\rightarrow Ze^+e^-$ is measured with ~0.7\,fb$^{-1}$ of data collected with the L3 detector at LEP. Decays of the Z boson into quarks and muons are considered at centre-of-mass energies ranging from $183$ GeV up to $209$ GeV. The measurements are found to agree with Standard Model predictions, achieving a precision of about 10\% for the hadronic channel. research-article

Carbon fibre tube for the ZEUS experiment at DESY, Hamburg 1990 PHOTOLAB

Carbon fibre tube for the ZEUS experiment at DESY, Hamburg 1990 PHOTOLAB

Carbon fibre tube for the ZEUS experiment at DESY, Hamburg 1990 PHOTOLAB

Seminar in honour of Professor Ugo Amaldi on the occasion of his 65th birthday Patrice Loiez Laurent Guiraud 1999 Entourant Ugo Amaldi (en haut, au centre), dans le sens des aiguilles d'une montre en partant de sa gauche : Luciano Maiani, Directeur general du CERN, G. Wolf (DESY), G. Kalmus (CERN), D. Treille (CERN), W. Schnell (retraite du CERN), P. Langacker (Universite de Pennsylvanie) et M. Goitein (Northeast Proton Therapy Center, Boston) PHOTOLAB

A s.c. Nb, 5-cell cavity (500 MHz) developed at CERN for testing in PETRA-DESY 1984 J.F. Malo inspects the cavity with its rf and diagnostic systems before cooldown in a vertical cryostat PHOTOLAB

STAC (1) 1977 A heavy target, nicknamed STAC, was used together with the NA2 large spectrometer for the study of muon-nucleon scattering by the European Muon Collaboration (EMC). It was built at DESY, and there tested in an electron beam, then in an SPS hadron beam in the West Hall. It consists of 26 iron/scintillator sandwich elements to measure the energy which the 280 GeV primary muon looses during its interaction in the target. and tested in an electron beam PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

The DESY Council (Verwaltungrat) visit to CERN 1978 No Abstract PHOTOLAB

Wolfgang Gentner Memorial 1981 The Memorial was held in the Main Auditorium on 30 April 1981. The photo shows (centre, first row) Volker Soergel (DESY Director), Mrs. Gentner, Jean Teillac (President of the Council), Hélène Langevin-Joliot, Herwig Schopper (CERN Director-General). PHOTOLAB

Herwig Schopper in front of the LEP final plan 1982 No Abstract PHOTOLAB

Superconducting cavity, prototype for tests at DESY 1982 5-cell superconducting cavity. Apart from developing and testing prototypes of superconducting cavities for LEP, one wanted to see how they performed under conditions with beam. Such tests were made at DESY, and this cavity was therefore dimensioned for 500 MHz, the frequency at which PETRA operated. See also 7908227, 8004204, 8007354, 8209255, 8312339. PHOTOLAB

Twenty of China's best physics PhD students visited CERN 2006 Twenty of the top physics PhD students in China were honoured with the 'E=mc2 to modern science' Einstein Award and received a three week tour of major laboratories in Germany and Switzerland, including CERN, DESY and the Max Planck Institute. The Einstein Award is co-sponsored by the German and Swiss Embassies in celebration of the 'Year of Physics' in 2005. For many years, Germany, Switzerland and China have been involved in numerous areas of scientific research and cooperation. PHOTOLAB

Rolf-Dieter Heuer, the next CERN Director-General from 2009 Christian Schmid DESY 2007 PHOTOLAB

An early photo of W Jentschke, Christmas 1941 1941 Willibald Jentschke, Director-General for CERN Laboratory I (January 1971 - December 1975) and founder of the DESY Laboratory in Hamburg PHOTOLAB

5 February 2010: Romanian Former Minister of Justice V. Stoica (4th from left) visiting SM18 with, from left to right, University of Bucharest Faculty of Physics A. Costescu, DESY Hamburg C. Diaconu; Mrs Valeriu Stoica; Université de Montpellier II S. Ciulli; Technology Department Vacuum, Surfaces and Coatings group S. Ilie; Technology Department Head F. Bordry and Adviser for Russian Federation, Central and Eastern Europe T. Kurtyka. 2010 PHOTOLAB

CMS Centres Worldwide, CMS Centre at DESY 2009 PHOTOCMS

30 July 2014 - German Baden-Württemberg Minister for Science, Research and the Arts T. Bauer signing an agreement on CERN technical student programme with Director-General R. Heuer. In the LHC tunnel at Point 5 with Technology Department Deputy Head V. Mertens, in the CMS experimental area with Collaboration Deputy Spokesperson and DESY K. Borras and CMS Team Leader, Karlsruhe Institut fur Technologie T. Muller; throughout accompanied by Head of International Relations R. Voss and CERN contact for the Baden-Württemberg exchange programme F. Haug. Gadmer Jean-Claude CERN 2014 Ms Theresia Bauer MdL Minister for Science, Research and the Arts Baden-Württemberg Federal Republic of Germany PHOTOLABCERN

Topological selections for V0 (K0s, Lambda) and Cascade (Xi, Omega) reconstruction in ALICE Maire Antonin Institut Pluridisciplinaire Hubert Curien (FR) 2011 The figures are illustrations of topological selections used by ALICE to reconstruct ϕ(1020), V0 particles (K°s and Λ, single-strange particles) and cascades (Ξ- and Ω-, charged multi-strange baryons). PHOTOALICE

CMS emulsion pictures during LS1 Di Ferdinando Donato INFN Bologna Puerta Pelayo Jesus Centro de Investigaciones Energ. Medioambientales y Tecn. - (ES) 2013 These images were taken at the CMS experimental cavern during Long Shutdown 1, installing pinhole cameras at different points of the cavern and exposing them for days. The development of the film was done by Donato di Ferdinando from INFN Bologna. A pinhole camera is a light-tight box where a small hole is made (diameter of the order of microns); a light-sensitive material is set in the back of the hole. As sensitive material a nuclear emulsion film from the OPERA experiment was used. It is a special photographic emulsion optimized (silver grains enriched) for the detection of charged particles. A very large amount of nuclear emulsions where used in Opera experiment, at the Gran Sasso Underground Labs; nuclear emulsions must detect the charged tau-leptons emerging from the interaction between the "oscillated" tau-neutrino coming from the pure muon-neutrino beam produced at CERN (the CNGS beam). The oscillations theory of neutrino expects that muon neutrinos oscillate to tau-neutrinos and due to this behavior neutrinos have a small mass, not as occurred in the Standard Model (in which neutrinos have zero mass). The target mass was composed of 150.000 bricks, technically called Emulsion Cloud Chamber (ECC). Each brick was composed of 57 nuclear emulsions (like the ones used for this pictures) interleaved with 56 lead plates, 1mm thick, with the same area of the emulsions. The brick was sealed to avoid light leaks. Each brick weighted 8.3 kg and the dimensions were 12.5 cm x 10.5 cm x 7.5 cm. The ECC in this way satisfies the requirements of high mass (the lead, to maximize the probability of the neutrino interaction) but overall the emulsion give us precision of micrometers in the measurements of the tracks and precision of 1-2 millirad in the measurements of angles of the tracks left on it by charged particles (decay products of the neutrinos). PHOTOCMS

Portrait of Joachim Mnich, Director for Research and Computing Brice Maximilien CERN Ordan Julien Marius Facility for Antiproton and Ion Research (DE) 2021 Joachim Mnich, Director for Research and Computing poses between two computer racks at the CERN Computer Center. He was Director in charge of Particle Physics at DESY since 2009 and joined CERN on 1 January 2021 to take up the role of Director for Research and Computing. PHOTOLABCERN

ATLAS Outstanding Achievement Award Winners 2020 2021 Winners of the 2020 ATLAS Outstanding Achievement Award Winners: Laetitia Bardo (CERN), Marie-Solene Teurnier (CERN), Laure Tranchand (CERN), Susumu Oda (Kyushu University), Ewelina Maria Lobodinska (Deutsches Elektronen-Synchrotron DESY), Clément Camincher (CERN), Adriana Milic (University of Toronto), Nikiforos Nikiforou (University of Texas at Austin), Elodie Deborah Resseguie (University of Pennsylvania and Lawrence Berkeley National Laboratory), Shion Chen (University of Pennsylvania), George Ian Dyckes (University of Pennsylvania), Khilesh Pradip Mistry (University of Pennsylvania), Daniil Ponomarenko (National Research Nuclear University/MEPhI), Vincent Wong (University of British Columbia), Keisuke Yoshihara (University of Pennsylvania), Toshi Sumida (Kyoto University), Tomomi Kawaguchi (Nagoya University), Junpei Maeda (Kobe University), Júlio Vieira de Souza (Universidade Federal de Juiz de Fora), Danijela Bogavac (IFAE) and George Iakovidis (Brookhaven National Laboratory).  PHOTOATLAS

ITk Pixel Module Assembly and Testing | ATLAS Phase-2 Upgrade Tian Yusong Georg August Universitaet Goettingen (DE) Skaf Ali Georg August Universitaet Goettingen (DE) Mobius Silke Georg August Universitaet Goettingen (DE) Bohlken Sascha Mario Georg August Universitaet Goettingen (DE) Kanngiesser Tim Georg August Universitaet Goettingen (DE) Widera Ruediger Manfred Georg August Universitaet Goettingen (DE) Lange Joern Georg August Universitaet Goettingen (DE) 2021 Pictures of the assembly and testing of the new Inner Tracker (ITk) Module, at DESY and Göttingen, as part of the Phase-2 upgrade of the ATLAS detector PHOTOATLAS

Images for CMS Tracker alignment in Run 2 Connor Patrick Hamburg University (DE) 2022 Pictures related to the tracker alignment studies in Run 2, including a comprehensive cartoon and a performance plot for the Z boson mass when Z decays to muons. PHOTOCMS

Amplitudes conference with Nima Arkani-Hamed, particle theorist Tovar Pascual Ana Universite Louis Lumiere (Lyon II) (FR) Rosmino Vesin Gabri Claudio Edoardo Universita & INFN, Milano-Bicocca (IT) 2023 Nima Arkani-Hamed (School of Natural Sciences, IAS, and Faculty Member at Princeton University) at CERN during the Amplitudes 2023 conference and the special event held in ther Main Auditorium on August 8, entitled "A chat about the future of particle physics”, a discussion with Beate Heinemann (director of DESY Hamburg), moderated by Lance Dixon (SLAC National Accelerator Laboratory). On indico: https://indico.cern.ch/e/amplitudes2023 PHOTOLABCERN

Beamline for Schools 10th edition celebration Krishna Chetna CERN 2023 Beamline for Schools (BL4S) is a physics competition for high school students from all around the world organised by CERN, the European Laboratory for Particle Physics, in Geneva, Switzerland, and DESY, the German Electron Synchrotron, in Hamburg, Germany. It was originally launched to celebrate the 60th anniversary of CERN. PHOTOLABCERN

CERN70 celebrations in Germany Krishna Chetna CERN 2024 On 2nd and 3rd September, CERN’s 70th anniversary was celebrated in Germany with a series of events like CERN Stories and an official ceremony held at Futurium, Berlin. Guests and participants at the ceremony included representatives from the Federal Ministry of Education and Research, CERN Director General Fabiola Gianotti, DESY Research Director Beate Heinemann, and many more. PHOTOLABCERN

Fifth anniversary celebration of the CERN-DESY collaboration of Beamline for Schools Cavazza Marina CERN 2024 Beamline for Schools (BL4S) is a physics competition for high school students from all around the world organised by CERN, the European Laboratory for Particle Physics, in Geneva, Switzerland, and DESY, the German Electron Synchrotron, in Hamburg, Germany. The competition was originally launched in 2014 by CERN. The fruitful collaboration between CERN and DESY started in 2019 during a long shutdown period of the CERN accelerators and thus they celebrated here their 5th anniversary. PHOTOLABCERN

CMS HGCAL silicon photomultiplier's and ECON ASICs test Rykalin Victor Urda Lourdes Centre National de la Recherche Scientifique (FR) Chudasama Ruchi University of Alabama (US) Li Jia-Hao Deutsches Elektronen-Synchrotron (DE) 2024 PHOTOCMS

CMS HGCAL modules testing at DESY Coll Saravia Lucia Ximena Deutsches Elektronen-Synchrotron (DE) 2024 The high granularity calorimeter (HGCAL) will be an entirely new sub-detector of the CMS experiment in the High Luminosity period. At DESY parts of its modules are going to be built, which have to pass rigorous tests. Using the DESY II test beam facilities, CMS scientists are able to replicate the conditions of the CMS detector by using a beam of high-energy electrons. This allows for precise measurement and validation of the modules' responses, ensuring they meet the rigorous standards required for the experiment. Crucial to this process is the use of specialized readout electronics based on ASICs (Application-Specific Integrated Circuits) and FPGAs (Field-Programmable Gate Arrays), to collect and process data at incredibly high speeds, all within a 25-nanosecond window. PHOTOCMS

CMS High Granularity Calorimeter (HGCAL) Scintillator Tiles and electronics Gecse Zoltan Fermi National Accelerator Lab. (US) Selivanova Daria Deutsches Elektronen-Synchrotron (DE) Krawczyk Marta CERN 2024 PHOTOCMS

Phase 2 Outer Tracker 2S module prototype assembly and TEDD supporting structure measurement Pichler Klaus A professional photgrapher Delaere Christophe Universite Catholique de Louvain (UCL) (BE) Maier Stefan KIT - Karlsruhe Institute of Technology (DE) Barvich Tobias KIT - Karlsruhe Institute of Technology (DE) 2024 As part of the upgrades of CMS detector for High-Luminosity LHC, the development of the new silicon modules for the CMS Outer Tracker (OT) aims to deliver higher granularity, lower mass and provide higher data rates as well as local track segments (stubs) at 40 MHz. Two module types (2S and PS) will be used in the Outer Tracker. Two TEDDs are being built, one for each side of the Tracker, in preparation for Hi-Lumi LHC. Each TEDD will have five double disks. Each of the disks for tracker endcaps is made up of two half-disks, or “Dees”. Two disks together, separated by only about 2cm, form a double disk. PHOTOCMS

Director for Accelerators and Technology: Oliver Brüning Brice Maximilien CERN 2026 Oliver Brüning is a German accelerator physicist who took up the role of CERN Director for Accelerators and Technology in January 2026. He earned his PhD from the University of Hamburg in 1994, following postdoctoral work at DESY on HERA proton beam stability, and took up a CERN fellowship in 1995. He joined CERN as a staff member in 1997, contributing to LHC optics, commissioning and upgrades. From 2008, he served as LHeC Study Leader and held several leadership roles in beam physics. From 2015 to 2019, he led the LHC Full Energy Exploitation Study, and from 2020 to 2025, he headed the High-Luminosity LHC (HL-LHC) Upgrade project. Brüning has served on several international committees, including as Chair of the DESY Machine Advisory Committee (2017–2020) and Chair of the EPS Accelerator Group (2008–2011). PHOTOLABCERN