HTL Resummation of the Thermodynamic Potential

Details HTL Resummation of the Thermodynamic Potential HTL Resummation of the Thermodynamic Potential

2000-11-20

arxiv.org/abs/hep-ph/0011250v2

Phys.Rev. D63 (2001) 105004

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1103/PhysRevD.63.105004

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.

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