Location: Cyclotron Building (434), Seminar Room
We study the evolution of heavy quarkonium states with temperature in a Quark Gluon Plasma (QGP) by evaluating the in-medium Q-bar{Q} T-matrix within a reduced Bethe-Salpeter equation. This provides a unified treatment of bound and scattering states including threshold effects and the transition to the continuum. The interaction kernel is extracted from finite-temperature QCD lattice calculations of the singlet-free energy of a Q-bar{Q} pair. The bound states are found to gradually move above the Q-bar{Q} threshold after which they rapidly dissolve in the hot system. In particular we study how our results depend on different choices of the Q-bar{Q} potential. We use the T-matrix to calculate Q-bar{Q} spectral and Euclidean-time correlation functions which are compared to lattice QCD results. We furthermore investigate the impact of finite-width effects on the single-quark propagators as estimated from recent applications of heavy-quark rescattering to RHIC data.