Top transport in electroweak baryogenesis

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 investigate the numerical impact of 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, and find that the effects discussed here lead to an increase in the baryon asymmetry by a factor of up to about 5.