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HK: Fachverband Physik der Hadronen und Kerne

HK 49: Theorie

HK 49.7: Talk

Friday, March 14, 2008, 15:30–15:45, 2F

Quark mass dependence of 1-loop and HTL self-energies — •Daniel Seipt, Marcus Bluhm, and Burkhard Kämpfer — Forschungszentrum Dresden-Rossendorf, PF 510119, 01314 Dresden, Germany

1-loop and HTL self-energies in hot QCD are presented with emphasis on the quark mass dependence. These self-energies enter our quasi-particle model via quasi-particle dispersion relations, which allows to parameterize and extend lattice QCD results for the equation of state (EoS), susceptibilities etc. The primary goal is to handle the chiral extrapolation of lattice QCD data, provided often at finite quark mass parameters. We find that the HTL approximation of the self-energies, valid only for small quark masses, differs significantly from the 1-loop results for quark mass values used in lattice calculations. The EoS may serve as input in the hydrodynamical prescription of the expansion stage of heavy-ion collisions at FAIR energies and also for LHC.