Purely perturbative Boltzmann equation for hot non-Abelian gauge theories

Details Purely perturbative Boltzmann equation for hot non-Abelian gauge theories Purely perturbative Boltzmann equation for hot non-Abelian gauge theories

2001-04-12

arxiv.org/abs/hep-ph/0104125v3

Phys.Rev. D64 (2001) 125009

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, revtex, to appear in Physical Review D

Scientific paper

10.1103/PhysRevD.64.125009

In the perturbation theory, trasnport phenomena in hot non-Abelian gauge theories like QCD are often plagued with infrared singularities or nonperturbative effects. We show, in the context of the Kadanoff & Baym formalism, that there are certain nonequilibrium processes which are free from such difficulties. For these processes, due to an interplay between the macroscopic and microscopic physics, characteristic time scale (the mesoscale) naturally enters as an infrared cutoff and purely perturbative description by the Boltzmann equation is valid.

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