EXPLICIT CP BREAKING AND ELECTROWEAK BARYOGENESIS

We investigate spatial behaviors of the CP-violating angle theta by so lving the equation of motion of the two-Higgs-doublet model in the pre sence of a small explicit CP breaking delta. The moduli of the two Hig gs scalars are fixed to be the kink shape with a common width. In addi tion to solutions theta similar to O(delta) in all the region, we find several sets of two solutions of opposite signs, whose magnitudes bec ome as large as O(1) around the surface of the bubble wall while the C P violation in the broken phase limit is of O(delta). Such set of solu tions not only yield sufficient amount of the chiral charge flux, but also avoid the cancellation in the net baryon number because of a larg e discrepancy in their energy densities driven nonperturbatively by th e small delta.