Top transport in electroweak baryogenesis

Details Top transport in electroweak baryogenesis Top transport in electroweak baryogenesis

2006-04-19

arxiv.org/abs/hep-ph/0604159v2

JHEP 0703:049,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 3 figures, references added

Scientific paper

10.1088/1126-6708/2007/03/049

In non-supersymmetric models of electroweak baryogenesis the top quark plays a crucial role. Its CP-violating source term can be calculated in the WKB approximation. We point out how to resolve certain discrepancies between computations starting from the Dirac equation and the Schwinger--Keldysh formalism. We also improve on the transport equations, keeping the W-scatterings at finite rate. We apply these results to a model with one Higgs doublet, augmented by dimension-6 operators, where our refinements lead to an increase in the baryon asymmetry by a factor of up to about 5.

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