Indirect Detection of Secluded Supersymmetric Dark Matter

TL;DR

This paper explores how secluded supersymmetric dark matter can be detected indirectly through gamma-ray spectra, analyzing the effects of different portals and R-parity violation, with observational constraints from Fermi-LAT and CTA.

Contribution

It provides gamma-ray spectra predictions for secluded supersymmetric dark matter and examines the impact of R-parity violation on indirect detection signals.

Findings

Fermi-LAT observations set limits on dark matter annihilation in dwarf galaxies.

Projections for CTA suggest improved sensitivity for detecting signals from the galactic center.

Many results are applicable to non-supersymmetric dark matter models.

Abstract

Weak-scale secluded sector dark matter can reproduce the observed dark matter relic density with thermal freeze-out within that sector. If nature is supersymmetric, three portals to the visible sector - a gauge portal, a Higgs portal, and a gaugino portal - are present. We present gamma ray spectra relevant for indirect detection of dark matter annihilation in such setups. Since symmetries in the secluded sector can stabilize dark matter, $R$-parity is unnecessary, and we investigate the impact of $R$-parity violation on annihilation spectra. We present limits from the Fermi Large Area Telescope observations of dwarf galaxies and projections for Cherenkov Telescope Array observations of the galactic center. Many of our results are also applicable to generic, non-supersymmetric setups.