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Journal of High Energy Physics

, 2011:53

First Online: 16 August 2011Received: 01 April 2011Revised: 07 July 2011Accepted: 27 July 2011


The hard-thermal-loop perturbation theory HTLpt framework is used to calculate the thermodynamic functions of a quark-gluon plasma to three-loop order. This is the highest order accessible by finite temperature perturbation theory applied to a non-Abelian gauge theory before the high-temperature infrared catastrophe. All ultraviolet divergences are eliminated by renormalization of the vacuum, the HTL mass parameters, and the strong coupling constant. After choosing a prescription for the mass parameters, the three-loop results for the pressure and trace anomaly are found to be in very good agreement with recent lattice data down to T ~ 2 − 3Tc, which are temperatures accessible by current and forthcoming heavy-ion collision experiments.

KeywordsNLO Computations Thermal Field Theory QCD ArXiv ePrint: 1103.2528

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Autor: Jens O. Andersen - Lars E. Leganger - Michael Strickland - Nan Su


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