Theoretical upper bound on the mass of the LSP in the MNSSM

TL;DR

This paper derives a theoretical upper limit on the mass of the lightest neutralino in the MNSSM, addressing the model's unique constraints and implications for dark matter candidates.

Contribution

It provides the first theoretical upper bound on the neutralino mass in the MNSSM, highlighting differences from the MSSM and solving the $$ problem.

Findings

Established an upper bound on the lightest neutralino mass.

Provided an approximate analytical solution for the neutralino mass.

Demonstrated the impact of the MNSSM on dark matter candidate properties.

Abstract

We study the neutralino sector of the Minimal Non-minimal Supersymmetric Standard Model (MNSSM) where the $\mu$ problem of the Minimal Supersymmetric Standard Model (MSSM) is solved without accompanying problems related with the appearance of domain walls. In the MNSSM as in the MSSM the lightest neutralino can be the absolutely stable lightest supersymmetric particle (LSP) providing a good candidate for the cold dark matter component of the Universe. In contrast with the MSSM the allowed range of the mass of the lightest neutralino in the MNSSM is limited. We establish the theoretical upper bound on the lightest neutralino mass in the framework of this model and obtain an approximate solution for this mass.