Finite temperature effects on CP violating asymmetries

Details Finite temperature effects on CP violating asymmetries Finite temperature effects on CP violating asymmetries

1997-04-21

arxiv.org/abs/hep-ph/9704366v1

Phys.Rev. D57 (1998) 93-99

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 20 pages, 1 figure

Scientific paper

10.1103/PhysRevD.57.93

We compute the CP violating decay asymmetries relevant for baryogenesis scenarios involving the out of equilibrium decays of heavy particles, including the finite temperature effects arising from the background of light thermal particles which are present during the decay epoch. Thermal effects can modify the size of CP violation by a sizeable fraction in the decay of scalar particles, but we find interesting cancellations in the thermal corrections affecting the asymmetries in the decays of fermions, as well as in the decay of scalars in supersymmetric theories. We also estimate the effects which arise from the motion of the decaying particles with respect to the background plasma.

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