Cosmic ray constraints on singlino-like dark matter candidates

TL;DR

This paper investigates how cosmic-ray anti-proton measurements can constrain low-mass singlino-like dark matter models, which are difficult to realize in standard supersymmetric frameworks but are viable in singlet extensions.

Contribution

It introduces a generic method to derive indirect detection constraints on singlino-like dark matter from cosmic-ray anti-proton data.

Findings

Cosmic-ray anti-proton data impose significant constraints on low-mass singlino dark matter.

Singlet extensions of the MSSM can produce GeV-scale neutralinos consistent with relic abundance.

The method provides a new way to test non-minimal supersymmetric dark matter models.

Abstract

Recent results from direct detection experiments (Dama, CoGeNT), though subject to debate, seem to point toward a low mass (few GeV) dark matter (DM) particle. However, low mass DM candidates are not easily achieved in the MSSM nor NMSSM. As shown by some authors, singlet extensions of the MSSM can lead to GeV mass neutralinos and satisfy relic abundance constraints. We propose here to extract indirect detection constraints on these models in a generic way from cosmic-ray anti-proton measurements (PAMELA data)