Baron asymmetry at the weak phase transition in presence of arbitrary CP violation

The interactions of fermions with the domain-wall bubbles produced during a first-order phase transition are considered. An exact solution of the Dirac equation's fermion propagation is obtained for a wall profile incorporating a position-dependent CP-violating phase. The reflection coefficients through the wall are computed for particles and antiparticles. The asymmetry in the reflection coefficients is specially high (a resonance effect) when the energy and mass of the ρincident particles are E/m = Δθ/2, where Δθ is the phase variation across the wall width. The chiral-charge flux through the wall surface and the corresponding baryon asymmetry of the Universe is computed. It agrees in sign and magnitude with the observed baryonic excess ρB/s≅10-10 for a large range of parameters and CP violation. As a function of Δθ, the ratio ρb/s reaches a maximum for large values of Δθ (m≅mtop)