Electroweak Baryogenesis in the Next to Minimal Supersymmetric Model

Details Electroweak Baryogenesis in the Next to Minimal Supersymmetric Model Electroweak Baryogenesis in the Next to Minimal Supersymmetric Model

1996-03-22

arxiv.org/abs/hep-ph/9603388v1

Phys.Lett. B372 (1996) 88-94

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, plain LaTex

Scientific paper

10.1016/0370-2693(96)00076-7

In the electroweak phase transition there arises the problem of baryon number washout by sphaleron transitions, which can be avoided if the phase transition is strongly enough first order. The minimal supersymmetric standard model has just two Higgs doublets H1 and H2, while the next to minimal model, NMSSM, has an additional singlet, N, this latter giving rise to the helpful feature that the Higgs potential contains a tree level trilinear field term. We use the tunneling criterion for the existence of a first order electroweak phase change. A quantitative statistical analysis indicates that with parameters of the NMSSM satisfying the experimental constraints a strong first order phase change occurs in about 50% of cases.

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