Electroweak baryogenesis and electron EDM in the TNMSSM

TL;DR

This paper investigates how CP-violating effects in the TNMSSM can explain the universe's matter-antimatter asymmetry through electroweak baryogenesis while remaining consistent with electron EDM constraints.

Contribution

It introduces the TNMSSM model with triplets and singlet, demonstrating its capability for strong first-order phase transition and successful baryogenesis within EDM bounds.

Findings

TNMSSM achieves strong first-order phase transition.

Model can generate observed baryon asymmetry.

Electron EDM bounds can be satisfied through cancellations.

Abstract

We have studied the impact of CP-violating (CPV) effects on electroweak baryogenesis (EWBG) and the electric dipole moment (EDM) of electron ($d_e$), the electric dipole moment (EDM) of mercury neutron ($d_n$) and the electric dipole moment (EDM) of ($d_{Hg}$) in an extension of the Minimal Supersymmetric Standard Model (MSSM). The model incorporating a $SU(2)$ triplet with hypercharges of $\pm1$ and a gauge singlet from the standard model that is mutually coupled, is collectively referred to as the next-to-minimal supersymmetric standard model with triplets (TNMSSM). Furthermore, we discuss the strong first-order phase transition (PT) achieved by this model via tree-level effects. The numerical results indicate that the TNMSSM can account for the observed baryon asymmetry. Additionally, the regions favored by EWBG can be compatible with the corresponding electron EDM bounds when different contributions to the $d_e$ cancel each other out.