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

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

2007-05-30

arxiv.org/abs/0705.4443v1

Phys.Rev.C76:041901,2007

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures

Scientific paper

10.1103/PhysRevC.76.041901

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.

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