Seminar in Hadronic Physics

Heavy Quark Bound States Above Deconfinement

Agnes Mocsy

BNL

It has been twenty years since the dissociation of the J/ψ was suggested as an “unambiguous” signal for deconfinement. This prediction of J/ψ suppression based on potential models have been tested extensively in relativistic collisions of heavy ions. In recent years lattice QCD calculations of quarkonium at finite temperature became available. The lattice results suggest that the J/ψ survives even at temperatures well above the deconfinement transition temperature. In this talk I discuss recent advances in our understanding of the survival of quarkonium above deconfinement. I place special emphasis on the spectral density analysis of the different quarkonia channels. I also discuss the discrepancy between potential models and lattice QCD and highlight the source of this discrepancy.