Aspects of the electroweak phase transition in the Minimal Supersymmetric Standard Model

Details Aspects of the electroweak phase transition in the Minimal Supersymmetric Standard Model Aspects of the electroweak phase transition in the Minimal Supersymmetric Standard Model

1993-12-16

arxiv.org/abs/hep-ph/9312296v2

Phys.Lett.B324:181-191,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 figures appended at the end as uuencoded ps-files, preprint CERN-TH.7057/93

Scientific paper

10.1016/0370-2693(94)90405-7

We study the finite-temperature effective potential of the Minimal Supersymmetric Standard Model in the full (mA, tan(beta)) parameter space. As for the features of the electroweak phase transition, we identify two possible sources of significant differences with respect to the Standard Model: a stop sector with little supersymmetry breaking makes the phase transition more strongly first-order, whereas a light CP-odd neutral boson weakens its first-order nature. After including the leading plasma effects, T=0 radiative corrections due to top and stop loops, and the most important experimental constraints, we find that the danger of washing out any baryon asymmetry created at the electroweak scale is in general no less than in the Standard Model.

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