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Bino-driven Electroweak Baryogenesis with highly suppressed Electric Dipole Moments

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arxiv 0811.1987 v1 pith:QASETQVB submitted 2008-11-12 hep-ph

Bino-driven Electroweak Baryogenesis with highly suppressed Electric Dipole Moments

classification hep-ph
keywords electroweakbaryogenesisedmsbino-drivenmssmscenariocp-violationdipole
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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It is conventional wisdom that successful electroweak baryogenesis in the Minimal Supersymmetric extension of the Standard Model (MSSM) is in tension with the non-observation of electric dipole moments (EDMs), since the level of CP-violation responsible for electroweak baryogenesis is believed to generate unavoidably large EDMs. We show that CP-violation in the bino-Higgsino sector of the MSSM can account for successful electroweak baryogenesis without inducing large EDMs. This observation weakens the correlation between electroweak baryogenesis and EDMs, and makes the bino-driven electroweak baryogenesis scenario the least constrained by EDM limits. Taking this observation together with the requirement of a strongly first-order electroweak phase transition, we argue that a bino-driven scenario with a light stop is the most phenomenologically viable MSSM electroweak baryogenesis scenario.

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