The study of lepton EDMs in $U(1{)}_X$ SSM

Abstract

The minimal supersymmetric extension of the standard model (MSSM) is extended to the $U(1{)}_X$SSM, whose local gauge group is $SU(3{)}_C\times SU(2{)}_L\times U(1{)}_Y\times U(1{)}_X$. To obtain the $U(1{)}_X$SSM, we add the new superfields to the MSSM, namely: three Higgs singlets $\hat{\eta },\hat{\bar{\eta }},\hat{S}$ and right-handed neutrinos ${\hat{\nu }}_i$. The CP violating effects are considered to study the lepton electric dipole moment(EDM) in $U(1{)}_X$SSM. The CP violating phases in $U(1{)}_X$SSM are more than those in the standard model(SM). In this model, some new parameters $({\theta }_S,{\theta }_{B{B}^{\prime }},{\theta }_{BL})$ as CP violating phases are considered, so there are new contributions to lepton EDMs. It is conducive to exploring the source of CP violation and probing new physical beyond SM.

Comments: 23 pages,12 figures