# Gamma Lines from the Hidden Sector

## TL;DR

This paper explores theories predicting distinctive gamma-ray lines from dark matter annihilation, emphasizing suppressed background processes and the potential for near-future experimental detection of these signals.

## Contribution

It introduces a class of dark matter models with prominent gamma lines and suppressed continuum, highlighting their testability with upcoming experiments.

## Key findings

- Gamma lines can be prominent due to suppressed final state radiation.
- Current bounds do not exclude the predicted gamma lines.
- Future experiments may detect these gamma lines in simple gauge theories.

## Abstract

We discuss the visibility of gamma lines from dark matter annihilation. We point out a class of theories for dark matter which predict the existence of gamma lines with striking features. In these theories, the final state radiation processes are highly suppressed and one could distinguish easily the gamma lines from the continuum spectrum. We discuss the main experimental bounds and show that one could test the predictions for gamma lines in the near future in the context of simple gauge theories for dark matter.