QCD Thermodynamics at Intermediate Coupling

Details QCD Thermodynamics at Intermediate Coupling QCD Thermodynamics at Intermediate Coupling

2010-12-15

arxiv.org/abs/1012.3377v2

AIP Conf.Proc.1343:510-512,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 2 figures; talk given at the conference "Quark Confinement and the Hadron Spectrum IX", August 30 - September 3, 2010

Scientific paper

10.1063/1.3575078

The weak-coupling expansion of the QCD free energy is known to order g_s^6log{g_s}, however, the resulting series is poorly convergent at phenomenologically relevant temperatures. In this proceedings, I discuss hard-thermal-loop perturbation theory (HTLpt) which is a gauge-invariant reorganization of the perturbative expansion for gauge theories. I review a recent NNLO HTLpt calculation of QCD thermodynamic functions. I show that the NNLO HTLpt results are consistent with lattice data down to temperatures T~2T_c.

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