Göttingen 1997 – scientific programme

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HK: Hadronen und Kerne

HK 58: Vormittagssitzung

HK 58.4: Group Report

Thursday, March 27, 1997, 12:00–12:30, HS A

Quarkonium Production and Colour Deconfinement in Nuclear Collisions — •D. Kharzeev — Fakult"at f"ur Physik, Universit"at Bielefeld, D-33501 Bielefeld, Germany

The suppression of quarkonium production in nucleus-nucleus collisions was originally proposed as a signal of colour deconfinement. Strong ”anomalous” J/Ψ suppression in Pb-Pb collisions has been reported at this Conference by the NA50 Collaboration. Is this suppression really anomalous? Can we conclude that the quark-gluon plasma is already discovered? What has to be done next? I address these questions basing on the current theoretical understanding of quarkonium production and new precise experimental information.