Fermion scattering off a CP-violating electroweak bubble wall.

A general prescription to solve the Dirac equation in the presence of CPviolating electroweak bubble wall is presented. The profile of the bubble wall is not specified except that the wall height is m0 and zero deep in the brokenand the symmetric-phase regions, respectively, where m0 is a fermion mass given by the Higgs-vacuum-expectation value and the Yukawa coupling. The CP-violating effects are evaluated by regarding CP-violating part of the bubble wall as a perturbation to CP-conserving solutions. The basic quantity, RR→L − R̄R→L, which would contribute to the cosmological baryon asymmetry, is estimated for some typical profiles of the wall, where RR→L(R̄R→L) is the reflection coefficient of right-handed chiral fermion (anti-fermion).