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1. Charged particle multiplicity in Pb-Pb collisions from the NA50 experiment

Author: R. Haroutunian, Roberta Arnaldi, Sanda Dita, D. Jouan, C. Quintans, M. Atayan, G. Borges, T. Claudino, T.L. Karavitcheva, B. Espagnon, P. Petiau, A. Baldit, Paolo Giubellino, Pietro Cortese, Stefania Beole, Enrico Scomparin, Y.K. Gavrilov, M. Gonin, Serban Constantinescu, X. Tarrago, P. Sonderegger, Mario Sitta, C. Castanier, P. Force, Marek Idzik, O. Drapier, H.R. Gulkanyan, F.F. Guber, Alexey Kurepin, Carlos Lourenco, L. Kluberg, N.S. Topilskaya, P. Saturnini, M. Mac Cormick, Mauro Gallio, V. Boldea, L. Riccati, A. Musso, G. L. Usai, C. Baglin, P. Rato Mendes, S. Serci, Ermanno Vercellin, Luciano Ramello, G. Puddu, J.-R. Pizzi, Bruno Alessandro, B. Chaurand, L. Capelli, N. Willis, A. Devaux, C. Gerschel, F Prino, W.L. Prado da Silva, F. Sigaudo, J.-Y. Grossiord, A. Piccotti, T. Wu, A. Bussiere, M. P. Comets, Enrico Scalas, A. Defalco, A.A. Grigorian, G. Dellacasa, Alberto Masoni, A. Romana, João Cruz, P. Macciotta, Calin Alexa, Helena Santos, M.B. Golubeva, M. Bedjidian, A. Guichard, F. Prino, S. Grigorian, J. Fargeix, A. Marzari-Chiesa, Massimo Masera, P. Bordalo, S. Ramos, R Hokobyan, Brigitte Cheynis, E. Chiavassa, Ruben Shahoyan, N DeMarco, Marco Monteno, Y. Le Bornec, J. Castor, S. Borenstein, L. Villatte, Corrado Cicalo, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), NA50, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, History, Large Hadron Collider, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Nuclear Theory, 01 natural sciences, 7. Clean energy, Charged particle, Computer Science Applications, Education, Nuclear physics, Transverse plane, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], 0103 physical sciences, Impact parameter, Multiplicity (chemistry), Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Particle density, Charged particle beam
Abstract: NA50; Angular distributions of charged particles produced in Pb-Pb collisions at the CERN SPS have been measured by the NA50 experiment. Measurements have been performed with a silicon microstrip detector at two different beam energies (40 and 158 GeV/nucleon) and over a wide impact parameter (centrality) range. The centrality of the collision has been evaluated both by neutral transverse energy released in the interaction and by spectator nucleons energy (zero degree energy). The charged particle density at midrapidity shows a linear dependence on the number of participating nucleons at both beam energies. The particle density per participant pair and its $\sqrt{S}$ dependence are also studied.
Published: 2005
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2. The production of , and mesons in p-, d-, S- and Pb-induced reactions at the CERN SPS

Author: Corrado Cicalo, X. Tarrago, C. Castanier, Mario Sitta, Sergio Serci, H.R. Gulkanyan, E. Vercellin, M. Bedjidian, Stefania Beole, W.L. Prado da Silva, F. Sigaudo, N DeMarco, M. Gallio, S. Grigorian, F.F. Guber, P. Force, S. Borenstein, Luciano Ramello, R. Haroutunian, A. Guichard, L. Villatte, Pietro Cortese, Massimo Masera, Y.K. Gavrilov, J. Fargeix, M. Mac Cormick, Enrico Scalas, A. Defalco, A.A. Grigorian, A. Marzari-Chiesa, Marco Monteno, Alexey Kurepin, Y. Le Bornec, E. Chiavassa, Ruben Shahoyan, João Cruz, A. Musso, A. Masoni, F Prino, G. Dellacasa, A. Romana, P. Rato Mendes, Roberta Arnaldi, G. Puddu, Carlos Lourenco, M. P. Comets, Helena Santos, Calin Alexa, G. L. Usai, P. Bordalo, B. Chaurand, L. Kluberg, N.S. Topilskaya, J. Castor, R. Hakobyan, O. Drapier, C. Gerschel, S. Ramos, G. Borges, T.L. Karavitcheva, A. Baldit, C. Baglin, Serban Constantinescu, B. Espagnon, C. Quintans, M. Atayan, Brigitte Cheynis, Bruno Alessandro, J.-R. Pizzi, Enrico Scomparin, L. Riccati, M. Gonin, T. Claudino, J.-Y. Grossiord, P. Macciotta, Marek Idzik, P. Petiau, P. Sonderegger, T. Wu, Sanda Dita, D. Jouan, V. Boldea, L. Capelli, N. Willis, A. Devaux, P. Saturnini, A. Piccotti, A. Bussiere, M.B. Golubeva, and Paolo Giubellino
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Muon, Meson, Proton, 010308 nuclear & particles physics, 7. Clean energy, 01 natural sciences, Omega, Nuclear physics, Pair production, Deuterium, 0103 physical sciences, 010306 general physics
Abstract: From proton, deuteron, S- and Pb-induced reactions, experiments NA38 and NA50 have measured muon pair production with various targets. In particular, the production rates of the , ω and ρ mesons have been simultaneously extracted and compared. Preliminary partial results of the most recent Pb–Pb measurement done in year 2000 by NA50 are presented here. They are also included in the comparison with the results obtained with lighter interacting nuclei.
Published: 2003
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3. Pseudorapidity distributions of charged particles in Pb-Pb collisions at super proton synchrotron energies from the NA50 experiment

Author: T. Claudino, J.-Y. Grossiord, Mario Sitta, Paolo Giubellino, Y.K. Gavrilov, Sergio Serci, M. Idzik, B. Espagnon, X. Tarrago, C. Castanier, Bruno Alessandro, Alexey Kurepin, A. Piccotti, G. Dellacasa, A. Baldit, Serban Constantinescu, Helena Santos, M. Masera, M. P. Comets, F. Prino, M. Mac Cormick, L. Villatte, Roberta Arnaldi, A.A. Grigorian, L. Riccati, A. Romana, Corrado Cicalo, I. Chevrot, A. De Falco, P. Bordalo, R. Hakobyan, J. Fargeix, Ermanno Vercellin, A. Bussiere, N. De Marco, S. Ramos, Stefania Beole, P. Saturnini, W.L. Prado da Silva, Calin Alexa, F. Sigaudo, O. Drapier, R. Haroutunian, M. C. Abreu, Giulio Usai, N. Willis, A. Masoni, M.B. Golubeva, A. Devaux, P. Force, G. Puddu, A. Guichard, C. Quintans, N. Constans, M. Atayan, Enrico Scalas, S. Silva, M. Bedjidian, Brigitte Cheynis, Pietro Cortese, E. Scomparin, G. Borges, T.L. Karavitcheva, S. Grigorian, P. Petiau, Carlos Lourenco, L. Kluberg, N.S. Topilskaya, P. Sonderegger, J.-R. Pizzi, Y. Le Bornee, Marek Idzik, A. Musso, Sanda Dita, D. Jouan, M. Gonin, H.R. Gulkanyan, Mauro Gallio, V. Boldea, L. Capelli, F.F. Guber, Luciano Ramello, P. Rato Mendes, B. Chaurand, C. Gerschel, Laurent Ducroux, C. Baglin, P. Macciotta, E. Chiavassa, Ruben Shahoyan, A. Marzari-Chiesa, Marco Monteno, and J. Castor
Subjects: Physics, Particle physics, Large Hadron Collider, Nuclear Theory, General Physics and Astronomy, Super Proton Synchrotron, Charged particle, Nuclear physics, Pseudorapidity, High Energy Physics::Experiment, Multiplicity (chemistry), Impact parameter, Nuclear Experiment, Nucleon
Abstract: We present the measurements of charged particle pseudorapidity distributions dNch/dη performed by the NA50 experiment in Pb-Pb collisions at the CERN SPS. Measurements were done at incident energies of 40 GeV (√s = 8.77 GeV) and 158 GeV (√s = 17.3 GeV) per nucleon over a broad impact parameter range. The multiplicity distributions are studied as a function of centrality using the number of participating nucleons(N part ), or the number of binary nucleon-nucleon collisions (Ncoll). Their values at midrapidity exhibit a linear scaling withN part at both energies. Particle yield increases approximately by a factor of 2 betweeny √s = 8.77 GeV and √s = 17.3 GeV.
Published: 2003
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4. Results on leptonic probes from NA50

Author: R. Haroutunian, M. Mac Cormick, Pietro Cortese, A. Bussiere, N. Willis, G. Puddu, S. Dita, E. Vercellin, J.Y. Grossiord, Yu.K. Gavrilov, A. B. Kurepin, S. Constantinescu, S. Ramos, A. Romana, X. Tarrago, Paolo Giubellino, A. Masoni, C. Castanier, B. Cheynis, R. Arnaldi, M. Bedjidian, O. Drapier, Mario Sitta, S. Grigorian, S. Borenstein, C. Cicalò, F.F. Guber, Enrico Scomparin, G. Borges, T.L. Karavitcheva, C. Alexa, L. Villatte, Y. Le Bornec, V. Boldea, P. Rato Mendes, W. L. Prado Da Silva, A. Musso, P. Bordalo, B. Espagnon, A. Marzari-Chiesa, C. Lourenço, M. Gallio, Marco Monteno, C. Quintans, M. Atayan, R. Hakobyan, L. Ramello, M. Gonin, M. P. Comets, L. Capelli, B. Chaurand, M. Masera, S. Beolè, M.B. Golubeva, A. Guichard, J.-R. Pizzi, C. Gerschel, P. Force, P. Sonderegger, J. Castor, L. Riccatoi, P. Petiau, G. Dellacasa, H. Gulkanyan, Helena Santos, E. Chiavassa, Marek Idzik, F. Sigaudo, Bruno Alessandro, C. Baglin, S. Serci, N DeMarco, G.L. Usai, L. Kluberg, N.S. Topilskaya, Enrico Scalas, A. Defalco, P. Macciotta, A. Baldit, João Cruz, J. Fargeix, A. Piccotti, A.A. Grigorian, F. Prino, D. Jouan, P. Saturnini, A. Devaux, T. Wu, R. Shahoyan, and T. Claudino
Subjects: Physics, Nuclear and High Energy Physics, Stereochemistry
Abstract: L. Ramello’) for the NA50 Collaboration: B. Alessandro”), C. Alexa4), R. Arnaldi”), M. Atayanr3), C. Baglin2), A. Baldit3), M. Bedjidian12), S. Beolk”), V. Boldea4), P. Bordalo?+), S.R. Borensteinr”lb), G. Borges 7), A. Bussiitre2), L. Cape111 ‘ 2), C. Castanier3), J. Castor3), B. Chaurand’“), B. Cheynis rz), E. Chiavassa”), C. Cicalb5), T. Claudino7) M P Cometsg), . . S. Constantinescu4), P. Cortese’), J. Cruz’I), A. DeFalco”): N. DeMarco’l), G. Dellacasa’), A. Devaux3), S. Dita4), 0. Drapier’O), B. Espagnon3), J. Fargeix3), P. Force3), M. Gallio”), Y.K. Gavrilovs), C. Gerschelg), P. Giubellino”“), MB. Golubeva@, M. Gonin”), A.A. Grigorian13), S. Grigorian13), J.Y. Grossiord12), F.F. Guber’), A. Guichard12), H. Gulkanyani3), R. Hakobyan13), R. Haroutunian12), M. Idzik”Td), D. Jouan’), T.L. Karavitcheva 8), L. Kluberg “1, A.B. Kurepin 8), Y. Le Bornecg), C. Lourenco 6), P. Macciotta5), M. Mac Cormickg), A. Marzari-Chiesa’*), M. Maserall), A. Mssoni 5), M. Monteno”), A. Mussoll), P. Petiaul”), A. Piccotti”), J R Pizzi12) . . W L Prado da Silva’r”) F. Prino L. Ramello’f, S. . . 11), G. Puddu5), C. Quintans’), Ramos 7+), P. Rato Mendes7), L. Riccati *l), A. RomanalO), H. Santos’) P. Saturnini3), E. Scalas’) E. Scomparin 11), S. Serci5), R. Shahoyan7yf), F. Sigaudo”), M. Sitta’), P. Sonderegge#+), X. Tarragog), N.S. Topilskaya’), G.L. Usai51, E. Vercellin”), L. Villatteg), N. Willisg), T. Wug).
Published: 2003
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5. $\phi$ and $\rho$ $plus$ $\omega$ vector-mesons produced in lead-induced collisions

Author: P. Rato Mendes, B. Chaurand, S R Borenstein, Mauro Gallio, V. Boldea, C. Gerschel, Mario Sitta, H.R. Gulkanyan, J. Fargeix, Sergio Serci, M. P. Comets, A. Masoni, Ermanno Vercellin, Enrico Scomparin, M. Gonin, S. Ramos, A. Baldit, A. Romana, Y Le Bornec, Calin Alexa, L. Ramello, W.L. Prado da Silva, P. Petiau, Roberta Arnaldi, F. Sigaudo, G. Puddu, P. Sonderegger, Paolo Giubellino, Bruno Alessandro, L. Riccati, N. De Marco, E Scalas, A. De Falco, Sanda Dita, D. Jouan, C Castanier, A. Bussiere, G. Borges, M.C. Abreu, C. Quintans, A. Guichard, T.L. Karavitcheva, M. Atayan, P. Saturnini, Serban Constantinescu, N. Constans, Y.K. Gavrilov, B. Espagnon, M.B. Golubeva, A. Piccotti, J.-R. Pizzi, Alexey Kurepin, A.A. Grigorian, L. Villatte, João Cruz, S. Silva, F. Prino, Jean-Yves Grossiord, M Bedjidian, N. Willis, L Capelli, G. L. Usai, A. Musso, Brigitte Cheynis, Pietro Cortese, Carlos Lourenco, L. Kluberg, N.S. Topilskaya, Stefania Beole, A. Marzari-Chiesa, Marco Monteno, P. Force, M. Mac Cormick, J. Castor, Corrado Cicalo, S. Grigorian, X. Tarrago, T. Claudino, Massimo Masera, E. Chiavassa, Ruben Shahoyan, C. Baglin, R Haroutunian, G. Dellacasa, Helena Santos, P. Macciotta, O Drapier, P. Bordalo, R. Hakobyan, A. Devaux, Marek Idzik, and F.F. Guber
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Proton, Meson, Strangeness production, Inverse, Heavy ion, Nuclear Experiment, Omega, Scaling, Ion
Abstract: The experiment NA50 studies the strangeness production by means of the BRμμσ/(BRρμμσρ + BRωμμσω) cross-sections ratio in relativistic heavy ion collisions with respect to proton and light ion collisions. New results for Pb+Pb interactions at 158 A GeV/c are presented (1998 data) and analysed with a different method. The BRμμσ/(BRρμμσρ + BRωμμσω) ratio shows an increase with the number of participants, in agreement with previous results. The inverse slope parameter extracted from the MT universal scaling is also studied.
Published: 2002
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6. New results on J/ψ from the NA50 experiment

Author: A. Piccotti, João Cruz, Roberta Arnaldi, J.-R. Pizzi, F. Prino, A. Bussiere, Ermanno Vercellin, Paolo Giubellino, H.R. Gulkanyan, Helena Santos, M. Mac Cormick, P. Petiau, A. Marzari-Chiesa, W.L. Prado da Silva, F. Sigaudo, F.F. Guber, Y.K. Gavrilov, N. Willis, S. Ramos, O. Drapier, P. Sonderegger, G. Puddu, Luciano Ramello, A. Devaux, M.B. Golubeva, Enrico Scalas, G. L. Usai, Alexey Kurepin, G. Dellacasa, Alberto Masoni, Sanda Dita, D. Jouan, P. Rato Mendes, S. Serci, C. Quintans, M. Atayan, N. De Marco, T. Claudino, B. Chaurand, X. Tarrago, A. Romana, C. Gerschel, Pietro Cortese, Calin Alexa, M. Bedjidian, C. Castanier, Brigitte Cheynis, S. Grigorian, Mauro Gallio, Carlos Lourenco, P. Bordalo, R. Hakobyan, V. Boldea, Enrico Scomparin, L. Kluberg, N.S. Topilskaya, A. De Falco, J.-Y. Grossiord, A. Guichard, Stefania Beole, T. Wu, M. Gonin, L. Capelli, A. Musso, P. Force, Mario Sitta, Marek Idzik, P. Saturnini, J. Fargeix, C. Baglin, P. Macciotta, Massimo Masera, E. Chiavassa, Ruben Shahoyan, M. P. Comets, B. Espagnon, R. Haroutunian, G. Borges, T.L. Karavitcheva, Corrado Cicalo, Marco Monteno, Y. Le Bornec, L. Riccati, J. Castor, S. Borenstein, L. Villatte, A. Baldit, Serban Constantinescu, Bruno Alessandro, and A.A. Grigorian
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Nuclear Theory, Plasma, 01 natural sciences, Atomic and Molecular Physics, and Optics, Charged particle, Ion, Renormalization, Nuclear physics, 0103 physical sciences, Quark–gluon plasma, High Energy Physics::Experiment, Heavy ion, Nuclear Experiment, 010306 general physics
Abstract: The NA50 experiment studies the production of J/γ in Pb+Pb collisions. The anomalous J/ψ suppression in relativistic heavy ion collisions, considered an unambiguous signature for the formation of a quark gluon plasma, is studied in the dimuon channel, using as reference the Drell-Yan muon pairs. Preliminary results from the analysis of the 2000 data, with the target region vacuum, are presented and compared to an update of those obtained from previous data samples.
Published: 2003
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7. J/psi azimuthal anisotropy relative to the reaction plane in Pb-Pb collisions at 158 GeV per nucleon

Author: F. Prino, B. Alessandro, C. Alexa, R. Arnaldi, M. Atayan, S. Beolè, V. Boldea, P. Bordalo, G. Borges, C. Castanier, J. Castor, B. Chaurand, B. Cheynis, E. Chiavassa, C. Cicalò, M. P. Comets, S. Constantinescu, P. Cortese, A. De Falco, N. De Marco, G. Dellacasa, A. Devaux, S. Dita, J. Fargeix, P. Force, M. Gallio, C. Gerschel, P. Giubellino, M. B. Golubeva, A. A. Grigoryan, S. Grigoryan, F. F. Guber, A. Guichard, H. Gulkanyan, M. Idzik, D. Jouan, T. L. Karavicheva, L. Kluberg, A. B. Kurepin, Y. Le Bornec, C. Lourenço, M. Mac Cormick, A. Marzari-Chiesa, M. Masera, A. Masoni, M. Monteno, A. Musso, P. Petiau, A. Piccotti, J. R. Pizzi, G. Puddu, C. Quintans, L. Ramello, S. Ramos, L. Riccati, H. Santos, P. Saturnini, E. Scomparin, S. Serci, R. Shahoyan, F. Sigaudo, M. Sitta, P. Sonderegger, X. Tarrago, N. S. Topilskaya, G. L. Usai, E. Vercellin, L. Villatte, N. Willis, T. Wu, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), NA50, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Meson, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Theoretical models, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, 01 natural sciences, Dissociation (chemistry), Azimuth, Nuclear physics, Transverse plane, 0103 physical sciences, Nuclear Physics - Experiment, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), 010306 general physics, Nucleon, Anisotropy, Nuclear Experiment, Fourier series, Engineering (miscellaneous)
Abstract: The J/$\psi$ azimuthal distribution relative to the reaction plane has been measured by the NA50 experiment in Pb-Pb collisions at 158 GeV/nucleon. Various physical mechanisms related to charmonium dissociation in the medium created in the heavy ion collision are expected to introduce an anisotropy in the azimuthal distribution of the observed J/$\psi$ mesons at SPS energies. Hence, the measurement of J/$\psi$ elliptic anisotropy, quantified by the Fourier coefficient v$_2$ of the J/$\psi$ azimuthal distribution relative to the reaction plane, is an important tool to constrain theoretical models aimed at explaining the anomalous J/$\psi$ suppression observed in Pb-Pb collisions. We present the measured J/$\psi$ yields in different bins of azimuthal angle relative to the reaction plane, as well as the resulting values of the Fourier coefficient v$_{2}$ as a function of the collision centrality and of the J/$\psi$ transverse momentum. The reaction plane has been estimated from the azimuthal distribution of the neutral transverse energy detected in an electromagnetic calorimeter. The analysis has been performed on a data sample of about 100 000 events, distributed in five centrality or p$_{\rm T}$ sub-samples. The extracted v$_{2}$ values are significantly larger than zero for non-central collisions and are seen to increase with p$_{\rm T}$., Comment: proceedings of HP08 conference corrected a typo in one equation
Published: 2009
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8. NA50 final results on charmonia suppression

Author: C Quintans, the Na50 Collaboration, B Alessandro, C Alexa, R Arnaldi, M Atayan, S Beolè, V Boldea, P Bordalo, G Borges, C Castanier, J Castor, B Chaurand, B Cheynis, E Chiavassa, C Cicalò, M P Comets, S Constantinescu, P Cortese, A De Falco, N De Marco, G Dellacasa, A Devaux, S Dita, J Fargeix, P Force, M Gallio, C Gerschel, P Giubellino, M B Golubeva, A A Grigoryan, S Grigoryan, F F Guber, A Guichard, H Gulkanyan, M Idzik, D Jouan, T L Karavicheva, L Kluberg, A B Kurepin, Y Le Bornec, C Lourenço, M Mac Cormick, A Marzari-Chiesa, M Masera, A Masoni, M Monteno, A Musso, P Petiau, A Piccotti, J R Pizzi, F Prino, G Puddu, L Ramello, S Ramos, L Riccati, H Santos, P Saturnini, E Scomparin, S Serci, R Shahoyan, F Sigaudo, M Sitta, P Sonderegger, X Tarrago, N S Topilskaya, G L Usai, E Vercellin, L Villatte, N Willis, T Wu, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), NA50, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear reaction, History, Meson, 010308 nuclear & particles physics, Hadron, Nuclear Theory, Elementary particle, Quarkonium, 01 natural sciences, Particle identification, Computer Science Applications, Education, Baryon, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Atomic physics, 010306 general physics, Nucleon, Nuclear Experiment
Abstract: NA50; The last results from the NA50 experiment on charmonia production in Pb-Pb interactions at 158 GeV/c per nucleon are presented. A strong J/$\psi$ suppression is observed, which increases with the centrality of the collisions. The J/$\psi$ production is seen to be anomalously suppressed starting at mid-centralities, when compared to a reference taken from proton-induced collisions. The most recent developments on the determination of this normal absorption curve are explained. It is also shown that for sulphur-induced reactions there is full agreement with the extrapolated normal p-A behaviour. The suppression of $\psi'$ production in heavy ion collisions (Pb-Pb and S-U) is also presented. It is seen to increase with the centrality of the collisions, and to be significantly stronger than the one measured in proton-induced reactions.
Published: 2005
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9. A new measurement of J/psi suppression in Pb-Pb collisions at 158 GeV per nucleon

Author: A. De Falco, A. Musso, Smbat Grigoryan, P. Saturnini, O. Drapier, A. Guichard, X. Tarrago, C. Castanier, P. Petiau, Ara Grigoryan, Roberta Arnaldi, Paolo Giubellino, M.P. Comets, M. Mac Cormick, Alexey Kurepin, T. Wu, L. Riccati, B. Chaurand, Mario Sitta, M. Masera, F.F. Guber, Bruno Alessandro, Tatiana Karavicheva, A. Marzari-Chiesa, C. Gerschel, S. Serci, Luciano Ramello, S. Ramos, P. Macciotta, Mauro Gallio, V. Boldea, J.-R. Pizzi, Enrico Scomparin, N. De Marco, M. Gonin, Alberto Masoni, A. Piccotti, H.R. Gulkanyan, P. Force, G. Borges, Helena Santos, Serban Constantinescu, Sanda Dita, D. Jouan, Marek Idzik, Pietro Cortese, S. Beole, G. Puddu, Ermanno Vercellin, P. Sonderegger, Carlos Lourenco, L. Kluberg, N.S. Topilskaya, E. Chiavassa, Ruben Shahoyan, F. Sigaudo, C. Quintans, M. Atayan, P. Bordalo, A. Devaux, G. L. Usai, J. Fargeix, Marco Monteno, Y. Le Bornec, J. Castor, Brigitte Cheynis, A. Romana, Calin Alexa, L. Villatte, Corrado Cicalo, F. Prino, N. Willis, G. Dellacasa, M.B. Golubeva, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), NA50, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Nuclear Theory, Drell–Yan process, FOS: Physical sciences, Elementary particle, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Energy density, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), 010306 general physics, Nucleon, Absorption (electromagnetic radiation), Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment, Nuclear Physics
Abstract: We present a new measurement of J/psi production in Pb-Pb collisions at 158 GeV/nucleon, from the data sample collected in year 2000 by the NA50 Collaboration, under improved experimental conditions with respect to previous years. With the target system placed in vacuum, the setup was better adapted to study, in particular, the most peripheral nuclear collisions with unprecedented accuracy. The analysis of this data sample shows that the (J/psi)/Drell-Yan cross-sections ratio measured in the most peripheral Pb-Pb interactions is in good agreement with the nuclear absorption pattern extrapolated from the studies of proton-nucleus collisions. Furthermore, this new measurement confirms our previous observation that the (J/psi)/Drell-Yan cross-sections ratio departs from the normal nuclear absorption pattern for semi-central Pb-Pb collisions and that this ratio persistently decreases up to the most central collisions., 19 pages, 10 figures. Submitted to Eur. Phys. J. C
Published: 2004
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10. J/$\psi$ production and suppression at SPS energies

Author: Ermanno Vercellin, F. Sigaudo, Marco Monteno, G. Puddu, Y. Le Bornec, H.R. Gulkanyan, T. Wu, X. Tarrago, C. Castanier, Bruno Alessandro, G. L. Usai, G. Borges, J. Castor, T.L. Karavitcheva, Corrado Cicalo, Paolo Giubellino, F.F. Guber, A. Marzari-Chiesa, M. Mac Cormick, B. Chaurand, Roberta Arnaldi, N. Willis, A.A. Grigorian, A. Devaux, C. Gerschel, Alberto Masoni, Luciano Ramello, Brigitte Cheynis, M. P. Comets, A. Musso, Marek Idzik, Serban Constantinescu, Stefania Beole, P Cortese, S. Ramos, Mauro Gallio, P. Petiau, N. De Marco, S. Serci, V. Boldea, P. Force, J. Fargeix, Smbat Grigoryan, P. Sonderegger, Mario Sitta, L. Villatte, Calin Alexa, P. Bordalo, A. Piccotti, Massimo Masera, F. Prino, L. Riccati, M.B. Golubeva, Sanda Dita, D. Jouan, A. De Falco, E. Chiavassa, Ruben Shahoyan, P. Saturnini, Enrico Scomparin, G. Dellacasa, Helena Santos, A. Guichard, Alexey Kurepin, Carlos Lourenco, L. Kluberg, N.S. Topilskaya, J.-R. Pizzi, C. Quintans, M. Atayan, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), NA50, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Proton, 010308 nuclear & particles physics, Absorption cross section, Nuclear matter, 01 natural sciences, 7. Clean energy, Ion, Momentum, Nuclear physics, Cross section (physics), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nucleon, Nuclear Experiment
Abstract: NA50; We present the set of measurements carried out by the NA50 experiment to study J$\psi$ production in proton- and ion-induced reactions. We also make use of results obtained previously under similar conditions by experiments NA51, NA38 and NA3. All these measurements were performed in fixed target experiments at the CERN SPS. Due to accelerator constraints, momentum was 450, 400 and 200 GeV/c for incident proton beams (corresponding to $\sqrt{s}$=29.0, 27.4, 19.4 GeV} respectively) whereas, for ion beams, incident momentum was 200 GeV/nucleon for oxygen and sulfur and 158 GeV/nucleon for Pb beams ($\sqrt{s}$=19.4 and $\sqrt{s}$=17.2 GeV} respectively). The p–A data allow us to determine with high accuracy the absorption cross section of the (pre-)resonant $c\bar{c}$ state with nuclear matter. The J$\psi$ production cross section normally expected for ion-induced reactions can then be determined and compared to the results obtained from the data collected for oxygen- and sulfur-induced collisions. Finally, we also present the most recent results on J$\psi$ production in Pb–Pb interactions. They are based on the last data sample collected with an improved experimental set-up and are compared with the expectations inferred from similar measurements on lighter nuclei collisions.
Published: 2004
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11. Transverse momentum dependence of charmonium suppression in Pb-Pb collisions at the CERN SPS

Author: A.B. Kurepin, B. Alessandro, C. Alexa, R. Arnaldi, M. Atayan, S. Beolè, V. Boldea, P. Bordalo, G. Borges, C. Castanier, J. Castor, B. Chaurand, B. Cheynis, E. Chiavassa, C. Cicalo, M.P. Comets, S. Constantinescu, P. Cortese, A. De Falco, N. De Marco, G. Dellacasa, A. Devaux, S. Dita, J. Fargeix, P. Force, M. Gallio, C. Gerschel, P. Giubellino, M.B. Golubeva, A.A. Grigorian, S. Grigorian, F.F. Guber, A. Guichard, H. Gulkanyan, M. Idzik, D. Jouan, T.L. Karavitcheva, L. Kluberg, Y. Le Bornec, C. Lourenço, M. Mac Cormick, A. Marzari-Chiesa, M. Masera, A. Masoni, M. Monteno, A. Musso, P. Petiau, A. Piccotti, J.R. Pizzi, F. Prino, G. Puddu, C. Quintans, L. Ramello, S. Ramos, L. Riccati, H. Santos, P. Saturnini, E. Scomparin, S. Serci, R. Shahoyan, F. Sigaudo, M. Sitta, P. Sonderegger, X. Tarrago, N.S. Topilskaya, G.L. Usai, E. Vercellin, L. Villatte, N. Willis, T. Wu, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), NA50, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Large Hadron Collider, 010308 nuclear & particles physics, 01 natural sciences, Nuclear physics, Cross section (physics), Amplitude, 0103 physical sciences, Transverse momentum, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Atomic physics, 010306 general physics, Nucleon, Nuclear Experiment
Abstract: Charmonium suppression in Pb-Pb collisions at 158 GeV/c per nucleon is investigated in detail with the study of the transverse momentum distributions of J/ ψ as a function of the centrality of the collision. It is shown that the observed J/ ψ suppression in Pb-Pb interactions is particularly significant mainly at low transverse momentum where it strongly depends on centrality. For peripheral Pb-Pb collisions, the transverse momentum dependence of the J/ ψ cross section is, as a function of centrality, qualitatively similar to the dependence observed in p-A and S-U collisions. Comparing peripheral and central Pb-Pb collisions, the data show a relative suppression in the whole p T range although its amplitude significantly decreases with increasing p T and becomes almost p T independent for the highest p T values.
Published: 2004
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12. Fission cross sections of lead projectiles in Pb-nucleus interactions at 40 and158GeV∕cper nucleon

Author: A. Piccotti, A. Baldit, G. Dellacasa, Mauro Gallio, V. Boldea, Paolo Giubellino, Helena Santos, P. Bordalo, Bruno Alessandro, Tatiana Karavicheva, L. Capelli, Mario Sitta, Chiara Oppedisano, A. Devaux, F.F. Guber, Brigitte Cheynis, X. Tarrago, C. Castanier, C. Baglin, Luciano Ramello, P. Rato Mendes, A. Bussiere, M. Masera, L. Riccati, R. Shahoian, Bruno Espagnon, N. Willis, B. Chaurand, C. Gerschel, P. Macciotta, S. Serci, L. Villatte, A. Musso, Smbat Grigoryan, A. Guichard, Ermanno Vercellin, Marek Idzik, J. Fargeix, Alessandro Ferretti, Roberta Arnaldi, M.B. Golubeva, A. Marzari-Chiesa, Enrico Scomparin, F. Sigaudo, Sanda Dita, D. Jouan, S. Ramos, M.P. Comets, N. De Marco, Enrico Scalas, E. Chiavassa, Marco Monteno, G. L. Usai, A. De Falco, H.R. Gulkanyan, Y. Le Bornec, P. Force, Alberto Masoni, P. Saturnini, Serban Constantinescu, Ara Grigoryan, M. Mac Cormick, M. Bedjidian, P. Sonderegger, Alexey Kurepin, G. Puddu, J. Castor, F. Prino, Corrado Cicalo, Calin Alexa, S. Beole, Pietro Cortese, L. Kluberg, N.S. Topilskaya, J.-R. Pizzi, C. Quintans, M. Atayan, and G. Borges
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, 0103 physical sciences, Claude bernard, 010306 general physics, 01 natural sciences, Humanities
Abstract: B. Alessandro, C. Alexa, R. Arnaldi, M. Atayan, C. Baglin, A. Baldit, M. Bedjidian, S. Beole, V. Boldea, P. Bordalo,* G. Borges, A. Bussiere, L. Capelli, C. Castanier, J. Castor, B. Chaurand, B. Cheynis, E. Chiavassa, C. Cicalo, M. P. Comets, S. Constantinescu, P. Cortese, G. Dellacasa, A. Devaux, A. De Falco, N. De Marco, S. Dita, B. Espagnon, J. Fargeix, A. Ferretti, P. Force, M. Gallio, C. Gerschel, P. Giubellino, M. B. Golubeva, A. A Grigoryan, S. Grigoryan, F. F. Guber, A. Guichard, H. Gulkanyan, M. Idzik, D. Jouan, T. L. Karavicheva, L. Kluberg, A. B. Kurepin, Y. Le Bornec, P. Macciotta, M. Mac Cormick, A. Marzari-Chiesa, M. Masera, A. Masoni, M. Monteno, A. Musso, C. Oppedisano, A. Piccotti, J. R. Pizzi, F. Prino, G. Puddu, C. Quintans, L. Ramello, S. Ramos,* P. Rato Mendes, L. Riccati, H. Santos, P. Saturnini, E. Scalas, E. Scomparin, S. Serci, R. Shahoian, F. Sigaudo, M. Sitta, P. Sonderegger,* X. Tarrago, N. S. Topilskaya, G. L. Usai, E. Vercellin, L. Villatte, and N. Willis (NA50 Collaboration) Dipartimento di Fisica Sperimentale, Universita di Torino and INFN-Torino, Torino, Italy IFA, Bucharest, Romania YerPhI, Yerevan, Armenia LAPP, CNRS-IN2P3, Annecy-le-Vieux, France LPC, Universite, Blaise Pascal and CNRS-IN2P3, Aubiere, France Institut de Physique Nucleaire de Lyon (IPNL), Universite, Claude Bernard, IN2P3-CNRS, Villeurbanne, France LIP, Lisbon, Portugal Laboratoire Leprince-Ringuet, Ecole Polytechnique and CNRS-IN2P3, Palaiseau, France Universita di Cagliari and INFN, Cagliari, Italy IPN, Universite, de Paris-Sud and CNRS-IN2P3, Orsay, France Universita del Piemonte Orientale, Alessandria and INFN, Alessandria, Italy INR, Moscow, Russia CERN, Geneva, Switzerland (Received 20 June 2003; published 12 March 2004)
Published: 2004
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13. RECENT RESULTS OF J/Ψ SUPPRESSION FROM THE NA50 EXPERIMENT AT CERN SPS

Author: Bruno Espagnon, Ermanno Vercellin, Brigitte Cheynis, F. Sigaudo, Enrico Scalas, A. Defalco, S. Beole, João Cruz, L. Riccati, T. Wu, L. Villatte, V. Boldea, X. Tarrago, G. Borges, Paolo Giubellino, A. Marzari-Chiesa, Alberto Masoni, C. Castanier, S. Ramos, T.L. Karavitcheva, E. Chiavassa, Roberta Arnaldi, L. Capelli, T. Claudino, M. Masera, N DeMarco, P. Petiau, A. Romana, A. Piccotti, P. Bordalo, B. Chaurand, S. Serci, R. Hakobyan, P. Sonderegger, Calin Alexa, C. Gerschel, M. Bedjidian, M. Mac Cormick, M.P. Comets, A. Devaux, Mario Sitta, Helena Santos, G. L. Usai, O. Drapier, S. R. Borenstein, A. Baldit, H.R. Gulkanyan, Marco Monteno, F. Prino, P. Macciotta, N. Willis, A. Guichard, Sanda Dita, D. Jouan, J. Fargeix, C. Cicalo, A. Musso, Smbat Grigoryan, J. Castor, Enrico Scomparin, G. Dellacasa, Y. Lebornec, J.-Y. Grossiord, P. Force, Marek Idzik, M. Gonin, M. Gallio, P. Saturnini, F.F. Guber, Luciano Ramello, A. Bussiere, R. Haroutunian, Y.K. Gavrilov, C. Baglin, Alexey Kurepin, M.B. Golubeva, P. Rato-Mendes, Ruben Shahoyan, G. Puddu, Serban Constantinescu, A.A. Grigorian, Bruno Alessandro, W. Pradodasilva, Pietro Cortese, Carlos Lourenco, L. Kluberg, N.S. Topilskaya, C. Quintans, M. Atayan, and J.-R. Pizzi
Subjects: Physics, Nuclear physics, Large Hadron Collider
Published: 2003
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14. RESULTS FROM THE NA50 EXPERIMENT ON <font>J</font>/ψ SUPPRESSION AND CHARGED PARTICLE PSEUDORAPIDITY DISTRIBUTIONS IN PB–PB COLLISIONS

Author: V. Boldea, P. Petiau, P. Sonderegger, Paolo Giubellino, L. Capelli, G. Puddu, S. Beole, A. Bussiere, Mario Sitta, Ermanno Vercellin, L. Riccati, P. Bordalo, W.L. Prado da Silva, F. Sigaudo, R. Hakobyan, Roberta Arnaldi, M. Mac Cormick, Enrico Scalas, A. Musso, A. Defalco, A. Devaux, M. Masera, Bruno Espagnon, Sanda Dita, D. Jouan, P. Macciotta, S. Serci, G. L. Usai, M.B. Golubeva, Serban Constantinescu, A. Piccotti, G. Borges, O. Drapier, S. R. Borenstein, P. Saturnini, A. Romana, Y. Le Bornec, T.L. Karavitcheva, Helena Santos, João Cruz, Calin Alexa, P. Rato Mendes, X. Tarrago, A. Marzari-Chiesa, Alberto Masoni, C. Castanier, J.-Y. Grossiord, Bruno Alessandro, P. Force, M. Bedjidian, F. Prino, L. Villatte, B. Chaurand, S. Ramos, C. Gerschel, H.R. Gulkanyan, M.P. Comets, Ruben Shahoyan, N. Willis, C. Baglin, A. Guichard, A. Baldit, C. Cicalo, S. Grigorian, Enrico Scomparin, Brigitte Cheynis, M. Gonin, M. Gallio, Marek Idzik, R. Haroutunian, F.F. Guber, T. Wu, Marco Monteno, Luciano Ramello, Y.K. Gavrilov, T. Claudino, Alexey Kurepin, A.A. Grigorian, J. Castor, G. Dellacasa, Pietro Cortese, J. Fargeix, E. Chiavassa, Carlos Lourenco, L. Kluberg, N.S. Topilskaya, J.-R. Pizzi, C. Quintans, M. Atayan, and N DeMarco
Subjects: Physics, Particle physics, Pseudorapidity, Charged particle
Published: 2003
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15. Transverse momentum and transverse mass distributions of mesons produced in p-A and Pb-Pb interactions at the CERN SPS

Author: A.B. Kurepin, B. Alessandro, C. Alexa, R. Arnaldi, M. Atayan, C. Baglin, A. Baldit, M. Bedjidian, S. Beolè, V. Boldea, P. Bordalo, S.R. Borenstein, G. Borges, A. Bussière, L. Capelli, C. Castanier, J. Castor, B. Chaurand, B. Cheynis, E. Chiavassa, C. Cicalò, T. Claudino, M.P. Comets, S. Constantinescu, P. Cortese, J. Cruz, A. De Falco, N. De Marco, G. Dellacasa, A. Devaux, S. Dita, O. Drapier, B. Espagnon, J. Fargeix, P. Force, M. Gallio, Y.K. Gavrilov, C. Gerschel, P. Giubellino, M.B. Golubeva, M. Gonin, A.A. Grigorian, S. Grigorian, J.Y. Grossiord, F.F. Guber, A. Guichard, H. Gulkanyan, R. Hakobyan, R. Haroutunian, M. Idzik, D. Jouan, T.L. Karavitcheva, L. Kluberg, Y. Le Bornec, C. Lourenço, P. Macciotta, M. Mac Cormick, A. Marzari-Chiesa, M. Masera, A. Masoni, M. Monteno, A. Musso, P. Petiau, A. Piccotti, J.R. Pizzi, W.L. Prado da Silva, F. Prino, G. Puddu, C. Quintans, L. Ramello, S. Ramos, P. Rato Mendes, L. Riccati, A. Romana, H. Santos, P. Saturnini, E. Scalas, E. Scomparin, S. Serci, R. Shahoyan, F. Sigaudo, M. Sitta, P. Sonderegger, X. Tarrago, N.S. Topilskaya, G.L. Usai, E. Vercellin, L. Villatte, N. Willis, and T. Wu
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, Nuclear Theory, Hadron, Elementary particle, Parton, Quarkonium, Momentum, Nuclear physics, Transverse mass, High Energy Physics::Experiment, Nuclear Experiment, Boson
Abstract: We present a study of the transverse momentum and transverse mass of J ψ mesons produced in nucleus-nucleus and p-nucleus reactions. They include the most recent data collected by the NA50 experiment in PbPb and p-A reactions at 158 GeV/c and 400 GeV/c incident momentum respectively. Together with S-U results previously published by experiment NA38, the mean squared transverse momentum of J ψ mesons exhibit a scaling behaviour which could result from initial state parton interaction. However, for the most central PbPb collisions a saturation effect is observed as a function of centrality.
Published: 2003

16. Charmonia and Drell-Yan production in proton-nucleus collisions at the CERN SPS

Author: J.Y. Grossiord, Yu.K. Gavrilov, R. Arnaldi, E. Vercellin, R. Shahoyan, T. Claudino, Mario Sitta, C. Alexa, S. Constantinescu, S. Beolè, X. Tarrago, J. Fargeix, L Capelli, C. Lourenço, C. Baglin, A. Bussiere, N.S. Topilskaya, Laurent Ducroux, A. Marzari-Chiesa, Marco Monteno, P. Sonderegger, P. Rato Mendes, C. Quintans, M. Atayan, Paolo Giubellino, P. Macciotta, L. Kluberg, B. Chaurand, C. Gerschel, M. Mac Cormick, Pietro Cortese, L Villatte, J. Castor, N. Willis, Enrico Scomparin, G. Borges, S. Borenstein, C Castanier, T.L. Karavitcheva, João Cruz, S. Dita, S. Ramos, F Prino, L. Ramello, M. Gonin, G. Puddu, M. P. Comets, V. Boldea, E. Chiavassa, A. Piccotti, M.B. Golubeva, B. Espagnon, S. Grigorian, A.A. Grigorian, J.-R. Pizzi, W.L. Prado da Silva, F. Sigaudo, Y. Le Bornec, M. Gallio, A. Musso, P. Force, A. B. Kurepin, M. Masera, O. Drapier, P. Petiau, H. Gulkanyan, Enrico Scalas, Bruno Alessandro, F.F. Guber, N. De Marco, B. Cheynis, D. Jouan, G.L. Usai, N. Constans, P. Bordalo, R. Hakobyan, C. Cicalò, A. De Falco, L. Riccati, A. Devaux, P. Saturnini, S. Serci, Marek Idzik, G. Dellacasa, Helena Santos, A. Romana, A. Masoni, A. Guichard, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ALICE, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), NA50, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Hadron, Nuclear Theory, Elementary particle, Nuclear matter, Quarkonium, 01 natural sciences, Baryon, Nuclear physics, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Nucleon, Nuclear Experiment, Glauber, Particle Physics - Experiment
Abstract: Charmonium production in p-A collisions is a unique tool for the study of the interaction of bound ccbar in nuclear matter. It can provide details on the basic features of the resonance formation mechanism and, in particular, on its non-perturbative aspects. In this Letter, we present an experimental study of Charmonia and Drell-Yan production in proton-nucleus collisions at 450GeV/c. The results are analyzed in the framework of the Glauber model and lead to the values of the nuclear absorption cross-section sigma^abs_pA for j/psi and psi'. Then, we compare the J/psi absorption in proton-nucleus and sulphur-uranium interactions, using NA38 data. We obtain that, for the J/psi, omega^abs_pA and omega^abs_SU are compatible, showing that no sizeable additional suppression mechanism in present S-U collisions, and confirming that the anomalous J/psi suppression only sets in for Pb-Pb interactions.
Published: 2003
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17. $\phi$ production in Pb-Pb collisions at 158 GeV/c per nucleon incident momentum

Author: V. Caponi, G. L. Usai, C. Quintans, M. Atayan, Mario Sitta, Sergio Serci, P. Rato Mendes, C. Baglin, B. Chaurand, J.-Y. Grossiord, C. Gerschel, Roberta Arnaldi, A. Baldit, P. Macciotta, N. Willis, Serban Constantinescu, A. Marzari-Chiesa, Y.K. Gavrilov, A. Masoni, N. Constans, S. Grigoryan, A. Devaux, A. Bussiere, Paolo Giubellino, Alexey Kurepin, B. Espagnon, P. Bordalo, J.-R. Pizzi, H.R. Gulkanyan, F.F. Guber, R. Hakobyan, A.A. Grigorian, Mauro Gallio, V. Boldea, X. Tarrago, Massimo Masera, O. Drapier, Marco Monteno, Y. Le Bornec, C. Castanier, Laurent Ducroux, Luciano Ramello, J. Astruc, E. Chiavassa, Ruben Shahoyan, J. Fargeix, Marek Idzik, A. Piccotti, L. Capelli, João Cruz, A. Guichard, M.B. Golubeva, J. Castor, G. Borges, Ermanno Vercellin, Corrado Cicalo, A. De Falco, T.L. Karavitcheva, N. De Marco, Sanda Dita, D. Jouan, T. Claudino, P. Saturnini, W.L. Prado da Silva, F. Sigaudo, Pietro Cortese, Enrico Scalas, L. Villatte, F Prino, Carlos Lourenco, L. Riccati, Enrico Scomparin, S. Silva, L. Kluberg, N.S. Topilskaya, M. Gonin, Brigitte Cheynis, I. Chevrot, A. Romana, Calin Alexa, S. Ramos, M. P. Comets, G. Dellacasa, Helena Santos, P. Petiau, P. Sonderegger, Bruno Alessandro, M. Mac Cormick, G. Puddu, Stefania Beole, P. Force, A. Musso, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ALICE, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), NA50, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, 010308 nuclear & particles physics, Nuclear Theory, Hadron, 16. Peace & justice, 01 natural sciences, Nuclear physics, Particle decay, Pair production, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], 0103 physical sciences, Transverse mass, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: The production of vector mesons φ , ρ and ω has been measured in Pb–Pb collisions at 158 GeV/ c per nucleon incident momentum at the CERN/SPS. The muon spectrometer of experiment NA50 detects φ , ρ and ω mesons via their μ + μ − decay channel in the collision center of mass rapidity range 0⩽ y CM ⩽1. The results reported here show that the relative production of the φ compared to the ( ρ + ω ) and the φ multiplicity per participant nucleon ( N part ) increase with the centrality of the collision. On the other hand, the ( ρ + ω ) multiplicity per participant does not exhibit any N part dependence within our errors. The inverse slope parameter as deduced from an exponential fit to the φ transverse mass distribution is 228±10 MeV. Our results are compared with those obtained by experiment NA49 and with theoretical calculations.
Published: 2003
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18. Charmonia absorption in p-A collisions at the CERN SPS results and implications for PbPb interactions

Author: P. Cortese, B. Alessandro, C. Alexa, R. Arnaldi, M. Atayan, C. Baglin, A. Baldit, M. Bedjidian, S. Beolè, P. Bordalo, S.R. Borenstein, G. Borges, A. Bussière, L. Capelli, C. Castanier, J. Castor, B. Chaurand, B. Cheynis, E. Chiavassa, C. Cicaló, T. Claudino, S. Constantinescu, J. Cruz, A. de Falco, N. de Marco, G. Dellacasa, A. Devaux, S. Dita, O. Drapier, B. Espagnon, J. Fargiex, P. Force, M. Gallio, Y.K. Gavrilov, C. Gerschel, P. Giubellino, M.B. Golubeva, M. Gonin, A.A. Grigorian, S. Grigorian, J.Y. Grossiord, F.F. Guber, A. Guichard, H. Gulkanyan, R. Hakobyan, R. Haroutunian, M. Idzik, D. Jouan, T.L. Karavitcheva, L. Kluberg, A.B. Kurepin, Y. Le Bornec, C. Lourenço, P. Macciotta, M. Mac Cormick, A. Marzari-Chiesa, M. Masera, A. Masoni, M. Monteno, A. Musso, P. Petiau, A. Piccotti, J.R. Pizzi, W.L. Prado da Silva, F. Prino, G. Puddu, C. Quintans, L. Ramello, S. Ramos, P. Rato Mendex, L. Riccati, A. Romana, H. Santos, P. Saturnini, E. Scalas, E. Scomparin, S. Serci, R. Shahoyan, M. Sitta, P. Sonderegger, X. Tarrago, N.S. Topilskaya, G.L. Usai, E. Vercellin, L. Villatte, N. Willis, and T. Wu
Subjects: Physics, Nuclear and High Energy Physics, Claude bernard, Humanities
Abstract: P. Cortese’) for the NA50 Collaboration: B. Alessandrol’) C. Alexa4) R. Arnaldi M. Bedjidian”),‘S. Beole hglin’), A. Baldit3), ‘ll) ‘V. Boldea4), P. Bordalo’y@, S.R. Boreusteinlo~b), G. Borges7), A. Bussiere’), L. Capelli “),‘C. Castanier3), J. Castor 3), B. Chaurandl”), B. Cheynis12), E. Chiavassa”), C. Cicalb5), T. Claudino ‘) M.P. Cometsg), S. Constantinescu , 4), P. Cortesel), J. Cruz’), A. de Falco’), N. de Marco”), G. Dellacasa’), A. Devaux3), S. Dita4), 0. Drapier”), B. Espagnon3), J. Fargeix3), P. Force3), M. Gallio 11), Y.K. Gavrilov’), C. Gerschelg), P. Giubellinoll>c), M.B. Golubeva’), M. Gonin”), A.A. Grigorian13) S. Grigorian13), J Y Grossiord12) F.F. Guber’) A. Guichard . . 12), H. Gulkanyan 13), R. Haroutunian”), M. Idzikl’~d~, D. Jouan’), T.L. Karavitchew?) R. Hakobyan’3), L. Kluberg’O) A.B. Kurepin8), Y. Le Bornecg), C. Lourenqo’) P. Macciotta5), M. Mac Cormick;) A. Marzari-Chiesa”), M. Masera”), A. Masoni5), M. Mouteno”), A. Musso~~), P. Petiau”), A. Piccotti”), J.R. Pizzi”), W.L. Prado da Silvall*e), F. Prino”), G. Puddu’), C. Quintans’), L. Ramello’), S. Ftarno~~~~), P. Rata Mendes ‘), L. Riccati”), A. Romana’O), H. Santos’), P. Saturnini3), E. Scala& E. Scomparin 11), S. Serci5), R. Shahoyan7f), F. Sigaudo”), M. Sitta’), P. Sonderegger’+), X. Tarragog), N.S. Topilskaya8), G.L. Usai5), E. Vercellin”), L. Villatteg), N. Willisg), T. Wug). i) Univ. de1 Piemonte Orientale, Alessaudria and INFN-Torino, Italy. 2, LAPP, CNRSIN2P3, Annecy-le-Vieux, France. 3, LPC, Univ. Blaise Pascal and CNRSIN2P3, Aubiere, France. 4, IFA, Bucharest, Romania. 5, Univ. di Cagliari and INFN, Cagliari, Italy. 6, CERN, Geneva, Switzerland. ?) LIP, Lisbon, Portugal. 8, INR, Moscow, Russia. ‘1 IPN, Univ. de Paris-Sud and CNRS-IN2P3, Orsay, France. lo) Laboratoire Leprince-Ringuet, Ecole Polytechnique and CNRS-INZPS, Palaiseau, France. ii) Univ. di Torino and INFN, Torino, Italy. 12) IPN, Univ. Claude Bernard Lyon-I and CNRSIN2P3, Villeurbaune, France. i3) YerPhI, Yerevan, Armenia. a) Also at IST, Lisbon, Portugal. b, On leave from York College, CUNY, New York, USA. =) Also at CERN, Geneva, Switzerland. d, Also at FPNT, Cracow, Poland. e, Now at UERJ, Rio de Janeiro, Brazil. ‘) On leave from YerPhI, Yerevan, Armenia.
Published: 2003

19. Transverse momentum distribution of J/Ψ produced in PbPb and p-A interactions at the CERN SPS

Author: N.S. Topilskaya, B. Alessandro, C. Alexa, R. Arnaldi, M. Atayan, C. Baglin, A. Baldit, M. Bedjidian, S. Beolè, V. Boldea, P. Bordalo, G. Borges, A. Bussière, L. Capelli, C. Castanier, J. Castor, B. Chaurand, I. Chevrot, B. Cheynis, E. Chiavassa, C. Cicalo, T. Claudino, M.P. Comets, N. Constans, S. Constantinescu, P. Cortese, A.De Falco, G. Dellacasa, N.De Marco, A. Devaux, S. Dita, O. Drapier, L. Ducroux, B. Espagnon, J. Fargeix, P. Force, M. Gallio, Y.K. Gavrilov, C. Gerschel, P. Giubellino, M.B. Golubeva, M. Gonin, A.A. Grigorian, S. Grigorian, J.I. Grossiord, F.F. Guber, A. Guichard, H. Gulkanyan, R. Hakobyan, R. Haroutunian, M. Idzik, D. Jouan, T.L. Karavitcheva, L. Kluberg, A.B. Kurepin, Y.Le Bornec, C. Lourenço, P. Macciotta, M.Mac Cormick, A. Marzari-Chiesa, M. Masera, A. Masoni, M. Monteno, A. Musso, P. Petiau, A. Piccotti, J.R. Pizzi, W.L. Prado da Silva, F. Prino, G. Puddu, C. Quintans, L. Ramello, S. Ramos, P. Rato-Mendes, L. Riccati, A. Romana, H. Santos, P. Saturnini, E. Scalas, E. Scomparin, S. Serci, R. Shahoyan, F. Sigaudo, M. Sitta, C. Soave, P. Sonderegger, X. Tarrago, G.L. Usai, E. Vercellin, L. Villatte, and N. Willis
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Elementary particle, Quarkonium, Nuclear physics, Transverse mass, High Energy Physics::Experiment, Nuclear Experiment, Nucleon
Abstract: Muon pairs produced in Pb Pb interactions at 158 GeV/c per nucleon and in p-A interactions at 400 GeV/c, together with older S-U results obtained at 200 GeV/c are used to study the transverse momentum and transverse mass distributions of the J/Ψ.
Published: 2003

20. Latest results from NA50 on J/ψ suppression in Pb-Pb collisions at 158 GeV/c

Author: L. Capelli, O. Drapier, S. R. Borenstein, H.R. Gulkanyan, T. Claudino, Alberto Masoni, E. Chiavassa, A. Baldit, X. Tarrago, A. Marzari-Chiesa, J.-Y. Grossiord, N. Constans, Paolo Giubellino, C. Castanier, S. Ramos, Enrico Scomparin, Ermanno Vercellin, A. Guichard, Marek Idzik, G. Dellacasa, A.A. Grigorian, W.L. Prado da Silva, F. Sigaudo, M. Bedjidian, P. Rato Mendes, Y.K. Gavrilov, Sanda Dita, D. Jouan, N. De Marco, F. Prino, L. Villatte, G. L. Usai, Enrico Scalas, Alexey Kurepin, A. Romana, Y. Le Bornec, P. Bordalo, C. Quintans, A. De Falco, Calin Alexa, Mario Sitta, M. Atayan, R. Hakobyan, Bruno Espagnon, N. Willis, L. Riccati, C. Cicalo, Bruno Alessandro, A. Devaux, G. Puddu, B. Chaurand, Roberta Arnaldi, A. Musso, A. Piccotti, M. Gonin, J. Fargeix, F.F. Guber, Pietro Cortese, João Cruz, Luciano Ramello, C. Gerschel, Serban Constantinescu, M. Mac Cormick, A. Bussiere, Helena Santos, G. Borges, M.C. Abreu, M. Masera, M.B. Golubeva, Carlos Lourenco, P. Macciotta, T.L. Karavitcheva, S. Serci, L. Kluberg, N.S. Topilskaya, P. Petiau, J.-R. Pizzi, Marco Monteno, P. Saturnini, P. Sonderegger, S. Silva, M.P. Comets, J. Castor, S. Grigorian, Brigitte Cheynis, P. Force, S. Beole, Ruben Shahoyan, M. Gallio, R. Haroutunian, C. Baglin, and V. Boldea
Subjects: Nuclear physics, Nuclear reaction, Physics, Particle physics, Meson, Hadron, Quark model, Elementary particle, Nuclear Experiment, Kinetic energy, Nucleon, Quarkonium
Abstract: The main goal of the NA50 experiment is to study the J/ψ suppression pattern in Pb-Pb interactions, at 158 GeV/c per nucleon at the CERN SPS. We present here the results from the 1996 and 1998 data taking periods. We used new event selection procedures, different analysis techniques and different event centrality estimators and we can now confirm and extend our previous observation that the J/ψ is anomalously suppressed when going from peripheral to central Pb-Pb collisions. We observe that in peripheral collisions the J/ψ cross section per nucleon-nucleon collision agrees with the pattern inferred from a wide range of measurements with lighter systems, from p-p to S-U. When the collisions become more central a clear departure from this behavior is observed. The 1996 data show a sudden drop in the J/ψ production yield for transverse energy values above 40 GeV. The 1998 data provide a big improvement in the study of the most central region, where a second change in the pattern becomes visible. This suppres...
Published: 2002
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21. Scaling of charged particle multiplicity in Pb–Pb collisions at SPS energies

Author: Pietro Cortese, J.Y. Grossiord, Yu.K. Gavrilov, E. Vercellin, R. Arnaldi, M. Mac Cormick, Y. Le Bornec, A. Musso, P. Rato Mendes, A. Marzari-Chiesa, Marco Monteno, Bruno Alessandro, A. Romana, M. Masera, A. Masoni, B. Chaurand, P. Sonderegger, J. Castor, G.L. Usai, C. Gerschel, M.C. Abreu, Paolo Giubellino, G. Borges, T.L. Karavitcheva, L. Riccati, L. Villatte, I. Chevrot, S. Constantinescu, R. Haroutunian, V. Boldea, C. Quintans, M. Atayan, A. Baldit, X. Tarrago, C. Castanier, A. B. Kurepin, S. Serci, Mario Sitta, B. Espagnon, M. Gallio, P. Petiau, W.L. Prado da Silva, J.-R. Pizzi, A. Devaux, F. Sigaudo, S. Ramos, M. Bedjidian, L. Capelli, P. Force, C. Alexa, H. Gulkanyan, B. Cheynis, Enrico Scomparin, R. Shahoyan, N.S. Topilskaya, S. Grigorian, T. Claudino, Enrico Scalas, O. Drapier, C. Cicalò, S. Beolè, Laurent Ducroux, F.F. Guber, G. Puddu, G. Dellacasa, Helena Santos, L. Kluberg, A. De Falco, P. Saturnini, N. Willis, S. Dita, A. Piccotti, A.A. Grigorian, F. Prino, P. Bordalo, R. Hakobyan, M. P. Comets, Marek Idzik, L. Ramello, M. Gonin, M.B. Golubeva, J. Fargeix, A. Bussiere, A. Guichard, C. Lourenço, N. De Marco, D. Jouan, N. Constans, S. Silva, E. Chiavassa, C. Baglin, P. Macciotta, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ALICE, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), NA50, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, 010308 nuclear & particles physics, Nuclear Theory, Binary number, 7. Clean energy, 01 natural sciences, Power law, Charged particle, Nuclear physics, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], 0103 physical sciences, High Energy Physics::Experiment, Impact parameter, Multiplicity (chemistry), 010306 general physics, Nucleon, Nuclear Experiment, Scaling, Particle Physics - Experiment
Abstract: The charged particle multiplicity distribution dN ch / dη has been measured by the NA50 experiment in Pb–Pb collisions at the CERN SPS. Measurements were done at incident energies of 40 and 158 GeV per nucleon over a broad impact parameter range. The multiplicity distributions are studied as a function of centrality using the number of participating nucleons ( N part ), or the number of binary nucleon–nucleon collisions ( N coll ). Their values at midrapidity exhibit a power law scaling behaviour given by N part 1.00 and N coll 0.75 at 158 GeV. Compatible results are found for the scaling behaviour at 40 GeV. The width of the dN ch / dη distributions is larger at 158 than at 40 GeV/nucleon and decreases slightly with centrality at both energies. Our results are compared to similar studies performed by other experiments both at the CERN SPS and at RHIC.
Published: 2002
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22. Pseudorapidity distributions of charged particles as a function of centrality in Pb–Pb collisions at 158 and 40 GeV per nucleon incident energy

Author: M. Bedjidian, S. Grigorian, Paolo Giubellino, P. Rato Mendes, H.R. Gulkanyan, A. Masoni, B. Espagnon, B. Chaurand, C. Gerschel, A. Bussiere, O. Drapier, M. Mac Cormick, A. De Falco, C. Quintans, M. Atayan, J.-R. Pizzi, Stefania Beole, P. Saturnini, M. P. Comets, G. Dellacasa, P. Force, Bruno Alessandro, G. Puddu, Laurent Ducroux, X. Tarrago, J.-Y. Grossiord, S. Silva, C. Castanier, Mario Sitta, Helena Santos, F.F. Guber, T. Claudino, M.B. Golubeva, P. Petiau, A. Musso, Ermanno Vercellin, Sergio Serci, Brigitte Cheynis, Pietro Cortese, A. Piccotti, W.L. Prado da Silva, F. Sigaudo, Luciano Ramello, Roberta Arnaldi, P. Sonderegger, F. Prino, P. Bordalo, R. Hakobyan, Massimo Masera, Carlos Lourenco, Enrico Scalas, L. Riccati, Enrico Scomparin, N. Willis, A. Marzari-Chiesa, Marco Monteno, Y. Le Bornec, J. Castor, L. Villatte, Corrado Cicalo, L. Kluberg, N.S. Topilskaya, A. Devaux, M. Gonin, I. Chevrot, A. Guichard, A.A. Grigorian, Y.K. Gavrilov, E. Chiavassa, Ruben Shahoyan, A. Romana, Alexey Kurepin, C. Baglin, Calin Alexa, S. Ramos, Sanda Dita, D. Jouan, A. Baldit, J. Fargeix, Serban Constantinescu, Marek Idzik, G. Borges, M.C. Abreu, Mauro Gallio, T.L. Karavitcheva, V. Boldea, N. De Marco, R. Haroutunian, N. Constans, L. Capelli, G. L. Usai, P. Macciotta, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ALICE, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), NA50, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Large Hadron Collider, 010308 nuclear & particles physics, Nuclear Theory, Function (mathematics), 01 natural sciences, 7. Clean energy, Charged particle, Nuclear physics, Transverse plane, Pseudorapidity, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], 0103 physical sciences, High Energy Physics::Experiment, Impact parameter, 010306 general physics, Nucleon, Nuclear Experiment, Particle Physics - Experiment
Abstract: The charged particle distributions dN ch / dη have been measured by the NA50 experiment in Pb–Pb collisions at the CERN SPS. Measurements have been done at incident energies of 158 and 40 GeV per nucleon over a broad impact parameter range. Results obtained with two independent centrality estimators, namely the neutral transverse energy E T and the forward energy E ZDC , are reported.
Published: 2002
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23. The dependence of the anomalous $J/\psi$ suppression on the number of participant nucleons

Author: S. Beolè, P. Rato Mendes, G. Puddu, F.F. Guber, J.Y. Grossiord, B. Chaurand, Yu.K. Gavrilov, A. Bussiere, Enrico Scomparin, A. De Falco, R. Arnaldi, Paolo Giubellino, C. Gerschel, A. B. Kurepin, B. Espagnon, G.L. Usai, F. Sigaudo, L. Riccati, A. Guichard, V. Boldea, C. Quintans, M. Atayan, Mario Sitta, N. Willis, N.S. Topilskaya, P. Saturnini, N. De Marco, B. Cheynis, D. Jouan, S. Constantinescu, S. Dita, X. Tarrago, Bruno Alessandro, C. Castanier, E Scalas, H Santos, L. Capelli, I. Chevrot, N. Constans, L. Ramello, C. Alexa, M. Gonin, M. P. Comets, S. Silva, J.-R. Pizzi, J. Fargeix, C. Cicalò, A. Piccotti, M.B. Golubeva, M. Bedjidian, C. Baglin, P. Sonderegger, G. Borges, Laurent Ducroux, P. Force, S. Grigorian, A. Baldit, P. Petiau, O. Drapier, S. Ramos, T.L. Karavitcheva, H. Gulkanyan, M. Gallio, A.A. Grigorian, F. Prino, Y. Le Bornec, A. Musso, P. Macciotta, R. Haroutunian, C. Lourenço, Pietro Cortese, E. Chiavassa, A. Devaux, M. Mac Cormick, S. Serci, G. Dellacasa, M. Masera, A. Romana, A. Masoni, M.C. Abreu, R. Shahoyan, T. Claudino, A. Marzari-Chiesa, Marco Monteno, P. Bordalo, R. Hakobyan, J. Castor, E. Vercellin, L. Villatte, L. Kluberg, Marek Idzik, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ALICE, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), NA50, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)
Subjects: Deconfinement, Nuclear and High Energy Physics, Particle physics, Transverse energy, Hadron, Nuclear Theory, 158 Gev/C, Nucleus-nucleus collisions, 01 natural sciences, Nuclear physics, Cern-sps, 0103 physical sciences, 010306 general physics, Nuclear Experiment, Physics, Calorimeter (particle physics), Pattern, 010308 nuclear & particles physics, Zero (complex analysis), Function (mathematics), Pb-pb interactions, J-psi-suppression, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Quark–gluon plasma, High Energy Physics::Experiment, Nucleon, Glauber, Particle Physics - Experiment
Abstract: The observation of an anomalous J/psi suppression in Pb-Pb collisions by the NA50 Collaboration can be considered as the most striking indication for the deconfinement of quarks and gluons at SPS energies. In this Letter, we determine the J/psi suppression pattern as a function of the forward hadronic energy E-ZDC measured in a Zero Degree Calorimeter (ZDC). The direct connection between EZDC and the geometry of the collision allows us to calculate, within a Glauber approach, the precise relation between the number of participant nucleons N-part and E-ZDC. Then, we check if the experimental data can be better explained by a sudden or a smooth onset of the anomalous J/psi suppression as a function of the number of participants. (C) 2001 Elsevier Science B.V. All rights reserved. info:eu-repo/semantics/publishedVersion
Published: 2001
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24. Transverse flow in heavy ion interactions at the CERN SPS

Author: P. Saturnini, M.C. Abreu, B. Alessandro, C. Alexa, R. Arnaldi, M. Atayan, C. Baglin, A. Baldit, M. Bedjidian, S. Beolè, V. Boldea, P. Bordalo, A. Bussière, L. Capelli, L. Casagrande, C. Castanier, J. Castor, T. Chambon, B. Chaurand, I. Chevrot, B. Cheynis, E. Chiavassa, C. Cicalò, T. Claudino, M.P. Comets, N. Constans, S. Constantinescu, N. De Marco, A. De Falco, G. Dellacasa, A. Devaux, S. Dita, O. Drapier, L. Ducroux, B. Espagnon, J. Fargeix, P. Force, M. Gallio, Y.K. Gavrilov, C. Gerschel, P. Giubellino, M.B. Golubeva, M. Gonin, A.A. Grigorian, J.Y. Grossiord, F.F. Guber, A. Guichard, H. Gulkanyan, R. Hakobyan, R. Haroutunian, M. Idzik, D. Jouan, T.L. Karavitcheva, L. Kluberg, A.B. Kurepin, Y. Le Bornec, C. Lourenço, P. Macciotta, M. Mac Cormick, A. Marzari-Chiesa, M. Masera, A. Masoni, S. Mehrabyan, M. Monteno, A. Musso, P. Petiau, A. Piccotti, J.R. Pizzi, F. Prino, G. Puddu, C. Quintans, S. Ramos, L. Ramello, P.Rato Mendes, L. Riccati, A. Romana, I. Ropotar, E. Scomparin, S. Serci, R. Shahoyan, S. Silva, M. Sitta, C. Soave, P. Sonderegger, X. Tarrago, N.S. Topilskaya, G.L. Usai, E. Vercellin, L. Villatte, and N. Willis
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, Large Hadron Collider, Elliptic flow, Atomic and Molecular Physics, and Optics, Nuclear physics, Strange matter, Transverse plane, Thermalisation, State of matter, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Beam (structure)
Abstract: In the search for the quark-gluon plasma at CERN SPS, several signals were observed suggesting that this new state of matter was actually produced in the interactions induced by the lead beam at 158A GeV. The transverse flow phenomena characterize the distribution of the particles in the final state of the collision, and are expected to provide some indications about the initial state. More precisly, the existence of an elliptic flow directed along the reaction plane in the case of the non central collisions of two spherical nuclei, has been proposed to probe the thermalisation of the initial state. Indeed, the NA50 collaboration has measured these kind of effects in Pb-Pb collisions at 158A GeV, and we can conclude that the thermalisation of the initial state is actually present in these interactions. Conversely, there is no evidence for such a thermalisation in the NA38 data which were obtained with the sulphur beam at 200A GeV, neither in S-S nor in S-Cu interactions.
Published: 2001

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24 results on '"C Castanier"'

1. Charged particle multiplicity in Pb-Pb collisions from the NA50 experiment

2. The production of , and mesons in p-, d-, S- and Pb-induced reactions at the CERN SPS

3. Pseudorapidity distributions of charged particles in Pb-Pb collisions at super proton synchrotron energies from the NA50 experiment

4. Results on leptonic probes from NA50

5. $\phi$ and $\rho$ $plus$ $\omega$ vector-mesons produced in lead-induced collisions

6. New results on J/ψ from the NA50 experiment

7. J/psi azimuthal anisotropy relative to the reaction plane in Pb-Pb collisions at 158 GeV per nucleon

8. NA50 final results on charmonia suppression

9. A new measurement of J/psi suppression in Pb-Pb collisions at 158 GeV per nucleon

10. J/$\psi$ production and suppression at SPS energies

11. Transverse momentum dependence of charmonium suppression in Pb-Pb collisions at the CERN SPS

12. Fission cross sections of lead projectiles in Pb-nucleus interactions at 40 and158GeV∕cper nucleon

13. RECENT RESULTS OF J/Ψ SUPPRESSION FROM THE NA50 EXPERIMENT AT CERN SPS

14. RESULTS FROM THE NA50 EXPERIMENT ON <font>J</font>/ψ SUPPRESSION AND CHARGED PARTICLE PSEUDORAPIDITY DISTRIBUTIONS IN PB–PB COLLISIONS

15. Transverse momentum and transverse mass distributions of mesons produced in p-A and Pb-Pb interactions at the CERN SPS

16. Charmonia and Drell-Yan production in proton-nucleus collisions at the CERN SPS

17. $\phi$ production in Pb-Pb collisions at 158 GeV/c per nucleon incident momentum

18. Charmonia absorption in p-A collisions at the CERN SPS results and implications for PbPb interactions

19. Transverse momentum distribution of J/Ψ produced in PbPb and p-A interactions at the CERN SPS

20. Latest results from NA50 on J/ψ suppression in Pb-Pb collisions at 158 GeV/c

21. Scaling of charged particle multiplicity in Pb–Pb collisions at SPS energies

22. Pseudorapidity distributions of charged particles as a function of centrality in Pb–Pb collisions at 158 and 40 GeV per nucleon incident energy

23. The dependence of the anomalous $J/\psi$ suppression on the number of participant nucleons

24. Transverse flow in heavy ion interactions at the CERN SPS

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24 results on '"C Castanier"'

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