A Supersymmetric U(1)' Model with Multiple Dark Matters

TL;DR

This paper proposes a supersymmetric U(1)' model featuring multiple stable dark matter particles, addressing MSSM issues and aligning with experimental constraints, opening new avenues for dark matter detection.

Contribution

It introduces a U(1)' extension with residual U-parity, allowing multiple stable dark matter candidates within a supersymmetric framework.

Findings

Multiple stable particles can satisfy relic density constraints.

The model is consistent with direct detection experiments.

It offers new prospects for dark matter searches in experiments.

Abstract

We consider a scenario where a supersymmetric model has multiple dark matter particles. Adding a U(1)' gauge symmetry is a well-motivated extension of the Minimal Supersymmetric Standard Model (MSSM). It can cure the problems of the MSSM such as the mu-problem or the proton decay problem with high-dimensional lepton number and baryon number violating operators which R-parity allows. An extra parity (U-parity) may arise as a residual discrete symmetry after U(1)' gauge symmetry is spontaneously broken. The Lightest U-parity Particle (LUP) is stable under the new parity becoming a new dark matter candidate. Up to three massive particles can be stable in the presence of the R-parity and the U-parity. We numerically illustrate that multiple stable particles in our model can satisfy both constraints from the relic density and the direct detection, thus providing a specific scenario where a supersymmetric model has well-motivated multiple dark matters consistent with experimental constraints. The scenario provides new possibilities in the present and upcoming dark matter searches in the direct detection and collider experiments.