Phase Transitions in the Early Universe (Is there a Strongly First Order Electroweak Phase Transition?)

Details Phase Transitions in the Early Universe (Is there a Strongly First Order Electroweak Phase Transition?) Phase Transitions in the Early Universe (Is there a Strongly First Order Electroweak Phase Transition?)

1998-11-30

arxiv.org/abs/hep-ph/9811517v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, 11 figures, talk presented at the conference "Early Universe and Dark Matter", Heidelberg, July '98; two references

Scientific paper

After some introductory remarks about the prospects of first order phase transitions in the early universe, we discuss in some detail the electroweak phase transition. In the standard model case a clear picture is arising including perturbative and nonperturbative effects. Since in this case the phase transition is not strongly first order as needed for baryogenesis, we discuss supersymmetric variants of the standard model, the MSSM with a light stop$_R$ and a NMSSM model where this can be achieved. We conclude with some remarks about the technical procedure and about possible effects of a strongly first order electroweak phase transition including baryogenesis.

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