CERN Accelerating science

Article
Report number hep-ex/0106079
Title The onset of the anomalous J/$\psi$ suppression in Pb-Pb collisions at the CERN SPS
Related titleThe onset of the anomalous J/$\psi$ suppression in Pb Pb collisions at the CERN SPS.
Author(s)

Arnaldi, R. (CERN) ; Abreu, M.C. (LIP, Lisbon) ; Alessandro, B. (Turin U. ; INFN, Turin) ; Alexa, C. (Bucharest U.) ; Atayan, M. (Yerevan Phys. Inst.) ; Baglin, C. (Annecy, LAPP) ; Baldit, A. (Clermont-Ferrand U.) ; Bedjidian, M. (Lyon, IPN) ; Beole, S. (Turin U. ; INFN, Turin) ; Boldea, V. (Bucharest U.) ; Bordalo, P. (LIP, Lisbon) ; Borenstein, S.R. (Paris U., VI-VII) ; Borges, G. (LIP, Lisbon) ; Bussiere, A. (Annecy, LAPP) ; Capelli, L. (Lyon, IPN) ; Castor, J. (Clermont-Ferrand U.) ; Castanier, C. (Clermont-Ferrand U.) ; Chaurand, B. (Paris U., VI-VII) ; Cheynis, B. (Lyon, IPN) ; Chiavassa, E. (Turin U. ; INFN, Turin) ; Cicalo, C. (Cagliari U. ; INFN, Cagliari) ; Claudino, T. (LIP, Lisbon) ; Comets, M.P. (Orsay, IPN) ; Constans, N. (Paris U., VI-VII) ; Constantinescu, S. (Bucharest U.) ; Cortese, P. (Turin U. ; INFN, Turin) ; Cruz, J. (LIP, Lisbon) ; De Marco, N. (Turin U. ; INFN, Turin) ; De Falco, A. (Cagliari U. ; INFN, Cagliari) ; Dellacasa, G. (Turin U. ; INFN, Turin) ; Devaux, A. (Clermont-Ferrand U.) ; Dita, S. (Bucharest U.) ; Drapier, O. (Lyon, IPN) ; Espagnon, B. (Clermont-Ferrand U.) ; Fargeix, J. (Clermont-Ferrand U.) ; Force, P. (Clermont-Ferrand U.) ; Gallio, M. (Turin U. ; INFN, Turin) ; Gavrilov, Y.K. (Moscow, INR) ; Gerschel, C. (Orsay, IPN) ; Giubellino, P. (Turin U. ; INFN, Turin) ; Golubeva, M.B. (Moscow, INR) ; Gonin, M. (Paris U., VI-VII) ; Grigorian, A.A. (Yerevan Phys. Inst.) ; Grigorian, S. (Yerevan Phys. Inst.) ; Grossiord, J.Y. (Clermont-Ferrand U.) ; Guber, F.F. (Moscow, INR) ; Guichard, A. (Clermont-Ferrand U.) ; Gulkanyan, H. (Yerevan Phys. Inst.) ; Hakobyan, R. (Yerevan Phys. Inst.) ; Haroutunian, R. (Turin U. ; INFN, Turin) ; Idzik, M. (Turin U. ; INFN, Turin) ; Jouan, D. (Orsay, IPN) ; Karavitcheva, T.L. (Moscow, INR) ; Kluberg, L. (Paris U., VI-VII) ; Kurepin, A.B. (Moscow, INR) ; Bornec, Y.Le (Orsay, IPN) ; Lourenco, C. (CERN) ; Macciotta, P. (Cagliari U. ; INFN, Cagliari) ; MacCormick, M. (Orsay, IPN) ; Marzari-Chiesa, A. (Turin U. ; INFN, Turin) ; Masera, M. (Turin U. ; INFN, Turin) ; Masoni, A. (Cagliari U. ; INFN, Cagliari) ; Monteno, M. (Turin U. ; INFN, Turin) ; Musso, A. (Turin U. ; INFN, Turin) ; Petiau, P. (Paris U., VI-VII) ; Piccotti, A. (Turin U. ; INFN, Turin) ; Pizzi, J.R. (Lyon, IPN) ; Prado da Silva, W. (Turin U. ; INFN, Turin) ; Prino, F. (Turin U. ; INFN, Turin) ; Puddu, G. (Cagliari U. ; INFN, Cagliari) ; Quintans, C. (LIP, Lisbon) ; Ramos, S. (LIP, Lisbon) ; Ramello, L. (Turin U. ; INFN, Turin) ; Rato Mendes, P. (LIP, Lisbon) ; Riccati, L. (Turin U. ; INFN, Turin) ; Romana, A. (Paris U., VI-VII) ; Santos, H. (LIP, Lisbon) ; Saturnini, P. (Clermont-Ferrand U.) ; Scalas, E. (Turin U. ; INFN, Turin) ; Scomparin, E. (Turin U. ; INFN, Turin) ; Serci, S. (Cagliari U. ; INFN, Cagliari) ; Shahoyan, R. (LIP, Lisbon) ; Sigaudo, F. (Turin U. ; INFN, Turin) ; Silva, S. (LIP, Lisbon) ; Sitta, M. (Turin U. ; INFN, Turin) ; Sonderegger, P. (CERN) ; Tarrago, X. (Orsay, IPN) ; Topilskaya, N.S. (Moscow, INR) ; Usai, G.L. (Cagliari U. ; INFN, Cagliari) ; Vercellin, E. (Turin U. ; INFN, Turin) ; Villatte, L. (Orsay, IPN) ; Willis, N. (Orsay, IPN)

Publication 2002
Imprint 20 Jun 2001
Number of pages 4
In: 36th Rencontres de Moriond, Les Arcs, France, 17 - 24 Mar 2001, pp.287-290
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; NA50
Abstract The $J/\psi$ suppression observed by the NA50 experiment is one of the most striking signatures for quark gluon plasma formation in Pb-Pb collisions at 158 AGeV. The $J/\psi$ production has been studied as a function of the centrality of the collision estimated via the forward energy EZDC released in a zero degree calorimeter (ZDC). The study of the correlation between the number of participant nucleons in the collisions, Npart, and EZDC allows to check whether the $J/\psi$ suppression pattern vs. EZDC is compatible with a sudden $J/\psi$ suppression mechanism expressed as a function of Npart.

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