Charged-Particle Decay at Finite Temperature

Details Charged-Particle Decay at Finite Temperature Charged-Particle Decay at Finite Temperature

2011-10-10

arxiv.org/abs/1110.2171v2

Phys.Rev.D85:025018,2012

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 6 figures. v2: typos corrected, bibliography revised, content matches published version

Scientific paper

10.1103/PhysRevD.85.025018

Radiative corrections to the decay rate of charged fermions caused by the presence of a thermal bath of photons are calculated in the limit when temperatures are below the masses of all charged particles involved. The cancellation of finite-temperature infrared divergences in the decay rate is described in detail. Temperature-dependent radiative corrections to a two-body decay of a hypothetical charged fermion and to electroweak decays of a muon are given. We touch upon possible implications of these results for charged particles in the early Universe.

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