1999/03/25 by Edmond Iancu, Iancu, Edmond
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9903486
14 pages, 2 figures. Invited talk at SEWM'98, Copenhagen, Dec 98
arxiv created 1999/03/25 · arxiv updated 2009/11/30
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 g2T is generated by a Boltzmann equation which includes the collision term for colour relaxation.