Standard Model Baryogenesis

Details Standard Model Baryogenesis Standard Model Baryogenesis

1994-07-29

arxiv.org/abs/hep-ph/9407403v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, CERN-TH. 7368/94, LPTHE Orsay-94/71, HD-THEP-94-24

Scientific paper

Simply on CP arguments, we argue against a Standard Model explanation of baryogenesis via the charge transport mechanism. A CP-asymmetry is found in the reflection coefficients of quarks hitting the electroweak phase boundary created during a first order phase transition. The problem is analyzed both in an academic zero temperature case and in the realistic finite temperature one. At finite temperature, a crucial role is played by the damping rate of quasi-quarks in a hot plasma, which induces loss of spatial coherence and suppresses reflection on the boundary even at tree-level. The resulting baryon asymmetry is many orders of magnitude below what observation requires. We comment as well on related works.

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