HTL Resummation of the Thermodynamic Potential

Abstract

Starting from the Phi-derivable approximation scheme at leading-loop order, the thermodynamical potential in a hot scalar theory, as well as in QED and QCD, is expressed in terms of hard thermal loop propagators. This nonperturbative approach is consistent with the leading-order perturbative results, ultraviolet finite, and, for gauge theories, explicitly gauge-invariant. For hot QCD it is argued that the resummed approximation is applicable in the large-coupling regime, down to almost twice the transition temperature.

minor changes, to appear in PRD, 27 pages, 15 eps figures

References in corpus (2)

• Approximately self-consistent resummations for the thermodynamics of the quark-gluon plasma. I. Entropy and density
• The Equation of State of Deconfined Matter at Finite Chemical Potential in a Quasiparticle Description

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