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SUSY and the Electroweak Phase Transition

Glennys R. Farrar, Marta Losada

hep-pharXiv:hep-ph/9612346

Abstract

We analyze the effective 3 dimensional theory previously constructed for the MSSM and multi-Higgs models to determine the regions of parameter space in which the electroweak phase transition is sufficiently strong for a B+L asymmetry to survive in the low temperature phase. We find that the inclusion of all supersymmetric scalars and all 1-loop corrections has the effect of enhancing the strength of the phase transition. Without a light stop or extension of the MSSM the phase transition is sufficiently first order only if the lightest Higgs mass Mh 70 GeV and tanβ 1.75.

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