Split NMSSM with electroweak baryogenesis

TL;DR

This paper explores how the non-minimal split Supersymmetry model with an extra singlet can successfully generate the baryon asymmetry during the electroweak phase transition, consistent with current experimental constraints.

Contribution

It demonstrates the viability of electroweak baryogenesis within a specific extended supersymmetric model, highlighting phenomenological implications.

Findings

Successful baryogenesis is possible in the model.

Predictions for electric dipole moments are consistent with current bounds.

Collider signatures include light charginos and neutralinos.

Abstract

In light of the Higgs boson discovery we reconsider generation of the baryon asymmetry in the non-minimal split Supersymmetry model with an additional singlet superfield in the Higgs sector. We find that successful baryogenesis during the first order electroweak phase transition is possible within phenomenologically viable part of the model parameter space. We discuss several phenomenological consequences of this scenario, namely, predictions for the electric dipole moments of electron and neutron and collider signatures of light charginos and neutralinos.