Calculated in quantum electrodynamics (QED) and quantum chromodynamics (QCD) at high temperature, the damping rate of a mass shell moving fermion is known to present an infrared divergence due to unscreened magnetostatic modes. In this article, introducing a hard thermal loops (HTL) perturbative res
Damping and reaction rates of fermions in hot gauge theories
โ Scribed by Alejandro Ayala
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 307 KB
- Volume
- 74
- Category
- Article
- ISSN
- 0920-5632
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โฆ Synopsis
We examine the relation between the damping rate of a chiral fermion mode propagating in a hot plasma and the rate at which the mode approaches equilibrium. We show that these two quantities, obtained from the imaginary part of the fermion self-energy, are equal provided the reaction rate is defined using the appropriate wave function of the mode in the medium.
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