Dark Matter Decaying Now

TL;DR

This paper explores the potential gamma-ray signals from decaying dark matter particles within models involving extra dimensions and supersymmetry, highlighting possible observable consequences.

Contribution

It introduces the idea that dark matter decay signals could be detectable in gamma-ray spectra within specific theoretical frameworks involving extra dimensions and supersymmetry.

Findings

Dark matter decay may produce observable gamma-ray signals.

Examples include gravitinos, KK states, and branons.

Theoretical models predict specific decay signatures.

Abstract

The instability of dark matter may produce visible signals in the spectrum of cosmic gamma-rays. We consider this possibility in frameworks with additional spatial dimensions and supersymmetry. Examples of particles include superweakly-interacting massive particles such as gravitinos in supersymmetry models, the lightest Kaluza-Klein (KK) state in models with universal extra dimensions, and weakly-interacting massive particles such as branons in flexible brane-worlds.