Multicomponent Dark Matter in Supersymmetric Hidden Sector Extensions

TL;DR

This paper explores supersymmetric models with multiple stable particles in hidden sectors, proposing a multicomponent dark matter framework that aligns with astrophysical data and can be tested in current experiments.

Contribution

It introduces a novel class of supersymmetric models with multiple stable dark matter particles, including both fermionic and bosonic species, extending the MSSM framework.

Findings

Models can explain PAMELA positron excess

Consistent with anti-proton and photon flux data

Predicts detectable signals in direct detection experiments

Abstract

Most analyses of dark matter within supersymmetry assume the entire cold dark matter arising only from weakly interacting neutralinos. We study a new class of models consisting of $U(1)^n$ hidden sector extensions of the MSSM that includes several stable particles, both fermionic and bosonic, which can be interpreted as constituents of dark matter. In one such class of models, dark matter is made up of both a Majorana dark matter particle, i.e., a neutralino, and a Dirac fermion with the current relic density of dark matter as given by WMAP being composed of the relic density of the two species. These models can explain the PAMELA positron data and are consistent with the anti-proton flux data, as well as the photon data from FERMI-LAT. Further, it is shown that such models can also simultaneously produce spin independent cross sections which can be probed in CDMS-II, XENON-100 and other ongoing dark matter experiments. The implications of the models at the LHC and at the NLC are also briefly discussed.