Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-08-26
Phys.Rev. D66 (2002) 115011
Physics
High Energy Physics
High Energy Physics - Phenomenology
31 pages, 5 figures, uses RevTeX 4, a few comments and references added, final version to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.66.115011
We analyze electroweak baryogenesis in supersymmetric theories with flavor-dependent CP-violating phases. We generalize the standard approach to include the flavor dependence of the 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 non-minimal 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.
Delepine David
Felipe Ricardo Gonzalez
Khalil Shaaban
Teixeira Ana M.
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