On bulk viscosity and moduli decay

Details On bulk viscosity and moduli decay On bulk viscosity and moduli decay

2010-07-15

arxiv.org/abs/1007.2590v2

Prog.Theor.Phys.Suppl.186:404-416,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages. To appear in the proceedings of New Frontiers in QCD, Kyoto, Japan, January 18 - March 19, 2010. v2: reference added

Scientific paper

10.1143/PTPS.186.404

This pedagogically intended lecture, one of four under the header "Basics of thermal QCD", reviews an interesting relationship, originally pointed out by Bodeker, that exists between the bulk viscosity of Yang-Mills theory (of possible relevance to the hydrodynamics of heavy ion collision experiments) and the decay rate of scalar fields coupled very weakly to a heat bath (appearing in some particle physics inspired cosmological scenarios). This topic serves, furthermore, as a platform on which a number of generic thermal field theory concepts are illustrated. The other three lectures (on the QCD equation of state and the rates of elastic as well as inelastic processes experienced by heavy quarks) are recapitulated in brief encyclopedic form.

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