Leontovich Relations in Thermal Field Theory

Details Leontovich Relations in Thermal Field Theory Leontovich Relations in Thermal Field Theory

2000-04-15

arxiv.org/abs/hep-ph/0004146v1

Eur.Phys.J.C16:513-518,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 4 figures

Scientific paper

10.1007/s100520000440

The application of generalized Kramers-Kronig relations, the so-called Leontovich relations, to thermal field theory is discussed. Medium effects contained in the full, thermal propagators can easily be taken into account by this method. As examples the collisional energy loss of a charged particle in a relativistic plasma and the radiation of energetic photons from a quark-gluon plasma are considered. Within the leading logarithmic approximation the results based on the hard thermal loop resummation technique are reproduced easily. However, the method presented here is more general and provides exact expressions, which allow in principle non-perturbative calculations.

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