Time Structure of Anomalous J/psi and psi' suppression in nuclear collisions

Abstract

The data for the mean squared transverse momentum P_t as function of transverse energy E_t of J/Psi and Psi' produced in Pb-Pb collisions at the CERN-SPS are analyzed and it is claimed that they contain information about the time structure of anomalous suppression. A transport equation which describes transverse motion of J/Psi and Psi' in the absorptive medium is proposed and solved for a QGP and a comover scenario of suppression. While the comover approach accounts for the data fairly well without adjusting any parameter, the fit to the data within the QGP scenario requires to assume anomalous suppression to become effective rather late, 3-4 fm/c after the nuclear overlap.

11 pages, 4 figures

References in corpus (3)

• Transverse energy fluctuations and the pattern of J/Psi suppression in Pb-Pb collisions
• Why is the J/$\psi$ suppression enhanced at large transverse energy ?
• Transverse Momentum Dependence of Anomalous J/ψSuppression in Pb-Pb Collisions

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