Dark matter scenarios in the minimal SUSY B-L model

TL;DR

This paper explores various dark matter candidates in a minimal supersymmetric B-L model, identifying four new possibilities beyond the MSSM and analyzing their relic densities and experimental constraints.

Contribution

It introduces four novel dark matter candidates in the minimal SUSY B-L model and studies their relic densities, annihilation mechanisms, and experimental viability.

Findings

Four new dark matter candidates identified in the model.

Relic density can be achieved through co-annihilation and resonance effects.

All candidates are consistent with Xenon100 limits.

Abstract

We perform a study of the dark matter candidates of a constrained version of the minimal R-parity-conserving supersymmetric model with a gauged $U(1)_{B-L}$. It turns out that there are four additional candidates for dark matter in comparison to the MSSM: two kinds of neutralino, which either correspond to the gaugino of the $U(1)_{B-L}$ or to a fermionic bilepton, as well as "right-handed" CP-even and -odd sneutrinos. The correct dark matter relic density of the neutralinos can be obtained due to different mechanisms including new co-annihilation regions and resonances. The large additional Yukawa couplings required to break the $U(1)_{B-L}$ radiatively often lead to large annihilation cross sections for the sneutrinos. The correct treatment of gauge kinetic mixing is crucial to the success of some scenarios. All candidates are consistent with the exclusion limits of Xenon100.