Supersymmetric Interpretation of the EGRET Excess in Diffuse Galactic Gamma Rays

TL;DR

This paper explores how the excess gamma rays observed by EGRET can be explained by dark matter annihilation within a supersymmetric framework, aligning with existing constraints and models.

Contribution

It demonstrates that the EGRET gamma-ray excess is compatible with the minimal mSUGRA supersymmetric model, constraining WIMP mass and particle parameters.

Findings

EGRET excess consistent with dark matter annihilation signals

WIMP mass range derived from spectral analysis

Compatibility with minimal mSUGRA model constraints

Abstract

Recently it was shown that the excess of diffuse Galactic gamma rays above 1 GeV could be interpreted as a Dark Matter annihilation signal. From the spectral shape of the excess it is possible to determine a range for the allowed WIMP mass which can be used to test the supersymmetric parameter space. It is found that the EGRET excess combined with electroweak and other constraints, e.g. relic denisity or direct detection limits, is fully consistent with the minimal mSUGRA model for scalars in the TeV range and gauginos below 500 GeV.