Non-perturbative aspects of hot QCD

Details Non-perturbative aspects of hot QCD Non-perturbative aspects of hot QCD

1999-03-25

arxiv.org/abs/hep-ph/9903486v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 2 figures. Invited talk at SEWM'98, Copenhagen, Dec 98

Scientific paper

I discuss some non-perturbative aspects of hot gauge theories as related to the unscreened static magnetic interactions. I first review some of the infrared divergences which cause the breakdown of the perturbation theory. Then I show that kinetic theory, as derived from quantum field theory, is a powerful tool to construct effective theories for the soft modes, which then can be treated non-perturbatively. The effective theory at the scale $gT$ follows from a collisionless kinetic equation, of the Vlasov type. The effective theory at the scale $g^2T$ is generated by a Boltzmann equation which includes the collision term for colour relaxation.

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