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Abstract: The electroweak phase transition EWPT in the secluded-$U1-$-extended MSSMsMSSM is studied. Using the effective potential at zero and finitetemperatures, we search for the non-MSSM-like EWPT in which the light stop massis larger than the top quark mass. Scanning the parameters relevant to theEWPT, the upper limits of the Higgs boson masses, which are consistent with thestrong first order EWPT, are derived. For the lightest CP-even and -odd Higgsbosons, we find $m {H 1}<160$ GeV and $m {A 1}<250$ GeV, respectively. In thesMSSM, the tree-level CP violation is possible by the complex softsupersymmetry breaking masses. It is observed that such a CP-violating effectdoes not spoil the strong first order EWPT for the typical parameter sets.



Autor: Cheng-Wei Chiang, Eibun Senaha

Fuente: https://arxiv.org/







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