Study of deconfinement in NA50 |
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| Institution: | (1) LAPP, CNRS-IN2P3, Annecy-le-Vieux, France;(2) LPC, Univ. Blaise Pascal and CNRS-IN2P3, Aubiére, France;(3) IFA, Bucharest, Romania;(4) Universitá di Cagliari/INFN, Cagliari, Italy;(5) CERN, Geneva, Switzerland;(6) LIP, Lisbon, Portugal;(7) INR, Moscow, Russia;(8) IPN, Univ. de Paris-Sud and CNRS-IN2P3, Orsay, France;(9) LPNHE, Ecole Polytechnique and CNRS-IN2P3, Palaiseau, France;(10) Universitá di Torino/INFN, Torino, Italy;(11) IPN, Univ. Claude Bernard Lyon-I and CNRS-IN2P3, Villeurbanne, France;(12) YerPhI, Yerevan, Armenia;(13) FCT, Universidade de Algarve, Faro, Portugal;(14) IST, Universidade Técnica de Lisboa, Lisbon, Portugal;(15) Universitá del Piemonte Orientale, Alessandria and INFN-Torino, Italy;(16) UERJ, Rio de Janeiro, Brazil |
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| Abstract: | TheJ/Ψ production in 158 A GeV Pb-Pb interactions is studied, in the dimuon decay channel, as a function of centrality, as measured
with the electromagnetic or, alternatively, with the very forward hadronic calorimeters. After a first sharp variation at
mid-centrality, both patterns continue to fall down and exhibit a curvature change at high centrality values. This trend excludes
any conventional hadronic model and finds a natural explanation in a deconfined quark-gluon phase scenario.
On leave of absence from York College CUNY
On leave of absence of YerPhI, Yerevan, Armenia |
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| Keywords: | J/Ψ anomalous suppression quark-gluon plasma deconfinement |
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