Resonantly Enhanced CP Violation and Relaxation in Electroweak Baryogenesis

Abstract

New sources of CP violation beyond the Standard Model may help the scenario of electroweak baryogenesis (EWB) to account for the baryon asymmetry of the universe, and may be detectable in searches for permanent electric dipole moments of fundamental particles. Applying the methods of closed time‐path quantum field theory to derive transport equations relevant for EWB in the MSSM, we find regions of the parameter space where generation of the baryon asymmetry is resonantly enhanced, allowing successful baryogenesis with CP‐violating phases small enough to be consistent with experimental limits on electron and neutron EDMs.