J/psi Suppression and Enhancement in Au+Au Collisions at the BNL RHIC

Details J/psi Suppression and Enhancement in Au+Au Collisions at the BNL RHIC J/psi Suppression and Enhancement in Au+Au Collisions at the BNL RHIC

2001-04-06

arxiv.org/abs/hep-ph/0104071v1

Phys.Lett. B524 (2002) 265-272

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, REVTeX, 3 PS-figures

Scientific paper

10.1016/S0370-2693(01)01362-4

We consider the production of the J/psi mesons in heavy ion collisions at RHIC energies in the statistical coalescence model with an exact (canonical ensemble) charm conservation. The c\bar{c} quark pairs are assumed to be created in the primary hard parton collisions, but the formation of the open and hidden charm particles takes place at the hadronization stage and follows the prescription of statistical mechanics. The dependence of the J/psi production on both the number of nucleon participants and the collision energy is studied. The model predicts the J/psi suppression for low energies, whereas at the highest RHIC energy the model reveals the J/psi enhancement.

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