Perturbative Analysis of the MSSM Electroweak Phase Transition

Details Perturbative Analysis of the MSSM Electroweak Phase Transition Perturbative Analysis of the MSSM Electroweak Phase Transition

1997-06-17

arxiv.org/abs/hep-ph/9706389v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 1 ps figure, uses psfig. Talk given at "Strong and Electroweak Matter '97", Eger (Hungary) 21-25 May 1997

Scientific paper

Light stops can give a strong first order electroweak phase transition in the Minimal Supersymmetric Standard Model (MSSM) satisfying one of the necessary conditions for electroweak baryogenesis. I discuss the region of parameter space where this occurs using a perturbative analysis of the Higgs effective potential. Two-loop QCD corrections associated with stop loops are crucial to open this baryogenesis window, which corresponds to 2.25 < tan beta < 3.6, one stop not much heavier than the top quark, m_A > 120 GeV and a light Higgs boson with m_h < 85 GeV. This region will be explored by LEP II very soon.

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