Vacuum stability and electroweak baryogenesis in the MSSM with light stops
نویسندگان
چکیده
منابع مشابه
Comment on Vacuum Stability and Electroweak Baryogenesis in the MSSM with Light Stops
We show that, for all values of Tanβ and the light right-handed stop mass for which the electroweak phase transition is strong enough to avoid washout following electroweak baryogenesis, the electroweak vacuum is stable over the lifetime of the observed Universe. Cosmological stability of the electroweak vacuum is violated only if the light right-handed stop is lighter than 100-115GeV. The poss...
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We examine the neutralino relic density in the presence of a light top squark, such as the one required for the realization of the electroweak baryogenesis mechanism, within the minimal supersymmetric standard model. We show that there are three clearly distinguishable regions of parameter space, where the relic density is consistent with WMAP and other cosmological data. These regions are char...
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The possibility of creating baryon asymmetry at the electroweak phase transition in the minimal supersymmetric standard model is considered for the case when right-handed squarks are much lighter than left-handed ones. It is shown that the usual requirement v(T c)=T c > 1 for baryogenesis can be satissed in a range of the parameters of the model, consistent with present experimental bounds.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1997
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(97)01109-x