Bino-driven electroweak baryogenesis with highly suppressed electric dipole moments |
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Authors: | Yingchuan Li Stefano Profumo Michael Ramsey-Musolf |
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Institution: | 1. Department of Physics, University of Wisconsin, Madison, WI 53706, USA;2. Department of Physics and Santa Cruz Institute for Particle Physics, University of California, 1156 High St., Santa Cruz, CA 95064, USA;3. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, CA 91125, USA |
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Abstract: | 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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