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arXiv · hep-ph/9907460

Supersymmetric Electroweak Baryogenesis

Nuria Rius·Veronica Sanz
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Abstract

We calculate the baryon asymmetry generated at the electroweak phase transition in the minimal supersymmetric standard model, using a new method to compute the CP-violating asymmetry in the Higgsino flux reflected into the unbroken phase. The method is based on a Higgs insertion expansion. We find that the CP asymmetry at leading order is proportional to the change in $\tan β$ in the bubble wall, which is at most of order $10^{-2}$, while at next-to-leading order this suppression factor disappears. This result may enhance the final baryon asymmetry generated during the electroweak phase transition for small $Δβ(< 10^{-3}$).

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Nuria Rius, Veronica Sanz. 2000-04-04. Supersymmetric Electroweak Baryogenesis. https://doi.org/10.1016/s0550-3213(99)00797-x

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