Charmonium dynamics in Au+Au collisions at sqrt(S)=200 GeV

Abstract

The formation and suppression dynamics of J/Psi, Chi_c and Psi-Prime mesons is studied within the HSD transport approach for Au+Au reactions at the top RHIC energy of sqrt(S)=200 GeV. Two prominent models, which have been discussed for more than a decade, are incorporated, i.e. the 'hadronic comover absorption and reformation' model as well as the 'QGP threshold' scenario, and compared to available experimental data. Our studies demonstrate that both scenarios - compatible with experimental observation at SPS energies - fail severely at RHIC energies. This combined analysis - together with the underestimation of charm elliptic flow - proves that the dynamics of c, c-bar quarks are dominated by partonic interactions in the strong QGP (sQGP) and can neither be modeled by 'hadronic' interactions nor described appropriately by color screening alone.

4 pages, 2 figures

References in corpus (3)

• J/psi Production vs Centrality, Transverse Momentum, and Rapidity in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Charmonium dynamics in nucleus-nucleus collisions at SPS and FAIR energies
• Latest results from NA60

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• Evidence for non-hadronic interactions of charm degrees of freedom in heavy-ion collisions at relativistic energies
• Quarkonium formation time in relativistic heavy-ion collisions
• Charmonium dynamics in heavy ion collisions
• Charmed signatures for phase transitions in heavy-ion collisions