Z_2-Singlino Dark Matter in a Portal-Like Extension of the Minimal Supersymmetric Standard Model

TL;DR

This paper introduces a Z_2-stabilized singlino as a dark matter candidate within extended supersymmetric models, utilizing a heavy messenger field to facilitate Higgs portal interactions and account for cold dark matter relic abundance.

Contribution

It proposes a novel dark matter candidate, the Z_2-stabilized singlino, interacting via a heavy messenger in supersymmetric models like NMSSM and nMSSM.

Findings

Relic abundance matches observed cold dark matter levels for messenger mass M_S ≤ 10^4 GeV.

Model can be integrated into various realistic supersymmetric frameworks.

Dark matter candidate is stabilized by Z_2 symmetry and interacts through a Higgs portal-like mechanism.

Abstract

We propose a Z_2-stabilised singlino (\bar{\chi}) as a dark matter candidate in extended and R-parity violating versions of the supersymmetric standard model. \bar{\chi} interacts with visible matter via a heavy messenger field S, which results in a supersymmetric version of the Higgs portal interaction. The relic abundance of \bar{\chi} can account for cold dark matter if the messenger mass satisfies M_S \lsim 10^{4} GeV. Our model can be implemented in many realistic supersymmetric models such as the NMSSM and nMSSM.