Damping Rate of a Yukawa Fermion at Finite Temperature

Details Damping Rate of a Yukawa Fermion at Finite Temperature Damping Rate of a Yukawa Fermion at Finite Temperature

1994-06-07

arxiv.org/abs/hep-ph/9406242v1

Z.Phys. C66 (1995) 491-494

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, REVTEX, postscript figures appended, UGI-94-05

Scientific paper

10.1007/BF01556376

The damping of a massless fermion coupled to a massless scalar particle at finite temperature is considered using the Braaten-Pisarski resummation technique. First the hard thermal loop diagrams of this theory are extracted and effective Green's functions are constructed. Using these effective Green's functions the damping rate of a soft Yukawa fermion is calculated. This rate provides the most simple example for the damping of a soft particle. To leading order it is proportional to $g^2T$, whereas the one of a hard fermion is of higher order.

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