Two-Component Approach to $J/Ψ$ Production in High-Energy Heavy-Ion Collisions

Details Two-Component Approach to $J/Ψ$ Production in High-Energy Heavy-Ion Collisions Two-Component Approach to $J/Ψ$ Production in High-Energy Heavy-Ion Collisions

2002-09-12

arxiv.org/abs/hep-ph/0209141v2

Nucl.Phys. A715 (2003) 545-548

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages (incl. 4 postscript figures); v2: Typos corrected; uses espcrc1.sty. Talk given at Quark Matter 2002, Nantes, July 18-

Scientific paper

10.1016/S0375-9474(02)01512-9

The production of charmonia in ultrarelativistic heavy-ion collisions is investigated including two sources. These are a primordial contribution coupled with various phases of dissociation, and a statistical coalescence of $c$ and $\bar{c}$ quarks at the hadronization phase transition. Within a schematic fireball evolution, SPS data on $J/\Psi$ production can be reasonably well reproduced. Remaining discrepancies in the $\Psi'/\Psi$ ratio are discussed. Predictions for the $J/\Psi$ centrality dependence at RHIC energies are confronted with first data from PHENIX. The pertinent excitation function of the $N_{J/\Psi}/N_{c\bar{c}}$ ratio exhibits a characteristic minimum structure signaling the transition from the standard $J/\Psi$ suppression scenario (SPS) to predominantly statistical production (RHIC).

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