We analyze electroweak baryogenesis in supersymmetric theories with flavor-dependent $\mathrm{CP}$-violating phases. We generalize the standard approach to include the flavor dependence of the $\mathrm{CP}$-violating sources and obtain an analytical approximate expression for the baryon asymmetry of the universe induced by these sources. It is shown that in the framework where the $\mu$ term is real and the chargino sources vanish, large flavor mixing might lead to a substantial baryon asymmetry through the squark contributions, once the condition to have a strong first-order phase transition induced by light right-handed up squarks is relaxed. We derive model independent bounds on the relevant up-squark left-right mass insertions. We show that in supersymmetric models with nonminimal flavor structure these bounds can be reached and the required baryon asymmetry can be generated, while satisfying the constraints coming from the electric dipole moments.

• Received 2 September 2002

DOI:https://doi.org/10.1103/PhysRevD.66.115011