Multi-component Dark Matter in a Simplified E$_6$SSM Model

TL;DR

This paper explores a two-component dark matter model within the E6SSM framework, highlighting the potential for future detection of active higgsino dark matter and the challenges in detecting inert higgsino dark matter.

Contribution

It introduces a novel two-component dark matter scenario in the E6SSM with discrete symmetries, analyzing detection prospects for both components.

Findings

Active higgsino DM may be detectable in future experiments.

Inert higgsino DM remains difficult to detect.

Future direct detection experiments could identify the active component.

Abstract

We study Dark Matter (DM) in the Exceptional Supersymmetric Standard Model (E$_6$SSM). The model has both active and inert Higgs superfields and by imposing discrete symmetries one can generate two DM candidates. We show that the lightest higgsinos of the active and inert sectors give a viable setup for two-component DM. We also illustrate the scope of both direct and indirect detection experiments in extracting such a DM sector. Future experiments of the former kind have a good chance of finding the active component while the inert higgsino will be very hard to detect while those of the latter kind will have no sensitivity to either candidate.