News from Lattice QCD on Heavy Quark Potentials and Spectral Functions of Heavy Quark States

Details News from Lattice QCD on Heavy Quark Potentials and Spectral Functions of Heavy Quark States News from Lattice QCD on Heavy Quark Potentials and Spectral Functions of Heavy Quark States

2004-03-16

arxiv.org/abs/hep-lat/0403016v1

J.Phys. G30 (2004) S887-S894

Physics

High Energy Physics

High Energy Physics - Lattice

Plenary talk at the 17th International Conference on Ultra Relativistic Nucleus-Nucleus Collisions (Quark Matter 2004), Oaklan

Scientific paper

10.1088/0954-3899/30/8/030

We discuss recent lattice results on in-medium properties of hadrons and focus on thermal properties of heavy quark bound states. We will clarify the relation between heavy quark free energies and potentials used to analyze the melting of heavy quark bound states. Furthermore, we present calculations of meson spectral functions which indicate that the charmonium ground states, J/psi and eta_c, persist in the quark gluon plasma as well defined resonances with no significant change of their zero temperature masses at least up to T ~ 1.5 T_c. We also briefly comment on the current status of lattice calculations at non-vanishing baryon number density.

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