Electroweak phase transition in split SUSY

Abstract

The existence of the strongly first order electroweak phase transition (EWPT) in Early Universe is one of the necessary conditions for successful electroweak baryogenesis. To incorporate this idea we generalize Split SUSY model by splitting Z 3-symmetric NMSSM instead of MSSM. We have found that the strongly first order phase transition can take place in models where effective μ-parameter is of the order of splitting scale (so called μ-split scenario), while in models where μ is of the order of electroweak scale the phase transition is weaker.