Electroweak baryogenesis: concrete in a SUSY model with a gauge singlet

SUSY models with a gauge singlet easily allow for a strong first order elec troweak phase transition (EWPT) if the vevs of the singlet and Higgs fields are of comparable size. We discuss the profile of the stationary expanding bubble wall and CP-violation in the effective potential, in particular tra nsitional CP-violation inside the bubble wall during the EWPT. The dispersi on relations for charginos contain CP-violating terms in the WKB approximat ion. These enter as source terms in the Boltzmann equations for the (partic le-antiparticle) chemical potentials and fuel the creation of a baryon asym metry through the weak sphaleron in the hot phase. This is worked out for c oncrete parameters. (C) 2001 Published by Elsevier Science B.V.