# Dark Matter in B-L Supersymmetric Standard Model with Inverse Seesaw

## TL;DR

This paper explores dark matter candidates within the B-L Supersymmetric Standard Model with Inverse Seesaw, identifying viable right-handed sneutrino and neutralino particles that satisfy relic abundance, detection constraints, and potentially explain gamma-ray observations.

## Contribution

It introduces new dark matter candidates in the BLSSMIS framework and analyzes their viability against experimental constraints and astrophysical signals.

## Key findings

- Lightest right-handed sneutrino can account for Galactic Center gamma-ray excess.
- B-L neutralino constraints are compatible with heavy SUSY spectrum and LHC data.
- Viable parameter space exists where sneutrino relic abundance and detection limits are satisfied.

## Abstract

We show that the $B-L$ Supersymmetric Standard Model with Inverse Seesaw (BLSSMIS) provides new Dark Matter (DM) candidates (lightest right-handed sneutrino and lightest $B-L$ neutralino) with mass of order few hundreds GeV, while most of other SUSY spectrum can be quite heavy, consistently with the current Large Hadron Collider (LHC) constraints. We emphasize that the thermal relic abundance and direct detection experiments via relic neutralino scattering with nuclei impose stringent constraints on the $B-L$ neutralinos. These constraints can be satisfied by few points in the parameter space where the $B-L$ lightest neutralino is higgsino-like, which cannot explain the observed Galactic Center (GC) gamma-ray excess measured by Fermi-LAT. The lightest right-handed sneutrino DM is analysed. We show that for a wide region of parameter space the lightest right-handed sneutrino, with mass between 80 GeV and 1.2 TeV, can satisfy the limits of the relic abundance and the scattering cross with nuclei. We also show that the lightest right-handed sneutrino with mass ${\cal O}(100)$ GeV can account for the observed GC gamma-ray results.