Abstract
Electroweak baryogenesis (EWB) and electric dipole moment (EDM) have close relation with the new physics beyond the standard model (SM), because the SM CP-violating (CPV) interactions are not sufficient to provide the baryon asymmetry of the universe by many orders of magnitude, and the theoretical predictions for the EDM of electron (d_e) in the SM are too tiny to be detected in near future. In this work, we explore the CPV effects on EWB and the electron EDM in the minimal supersymmetric extension (MSSM) of the SM with local B-L gauge symmetry (B-LSSM). And the two-step transition via tree-effects in this model is discussed. Including two-loop corrections to d_e and considering the constrains from updated experimental data, the numerical results show that the B-LSSM can account for the observed baryon asymmetry. In addition, when the cancellation between different contributions to d_e takes place, the region favored by EWB can be compatible with the corresponding EDM bound.
Highlights
Despite the considerable success of the Standard Model (SM) in describing a large amount of experimental observations, there are still various of evidences beyond the SM
The SM prediction for the electron electric dipole moment (EDM) is about 10−38e · cm [4,5,6], which is impossible to be detected by present experiments
In our earlier work [63], we explore the effects of parameters tan β, tan β, gB, gY B and slepton masses ML,eon the muon magnetic dipole moment (MDM) in the B-LSSM without CPV
Summary
Despite the considerable success of the Standard Model (SM) in describing a large amount of experimental observations, there are still various of evidences beyond the SM. Since the experimental upper bound on the electron EDM is very small, the contributions from new CPV phases are limited strictly by the present experimental data, and researching NP effects on the electron EDM may shed light on the mechanism of CPV. The supersymmetric effects on the EDM of electron has been explored in Refs. The results show that the most interesting possibility to suppress the electron EDM to below the corresponding experimental upper bound is, the contributions from different phases cancel each other. We explore the CPV effects on YB and the electron EDM de in the B-LSSM. The analysis on electroweak phase transition (PT), YB and the electron EDM de in the B-LSSM are presented in Sect.
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