Gamma Lines and Dark Matter from Anomaly Cancellation

TL;DR

This paper proposes a minimal extension of the Standard Model predicting Majorana dark matter from anomaly cancellation, and explores its testable gamma-ray signatures at future telescopes like CTA.

Contribution

It introduces a simple, anomaly-free model with a local baryon number symmetry that predicts dark matter and analyzes its gamma-ray signals for experimental testing.

Findings

Gamma-ray lines from dark matter annihilation could be detectable by CTA.

The model links dark matter relic density with collider and direct detection constraints.

Unique gamma-ray features can distinguish this theory from other dark matter models.

Abstract

We discuss a simple theory for physics beyond the Standard Model where a Majorana dark matter is predicted from anomaly cancellation. We discuss in detail the minimal theory where the baryon number is a local symmetry spontaneously broken at the low scale. The correlation between the cosmological constraints on the dark matter relic density, the direct detection and collider bounds is investigated. We discuss in great detail the gamma lines from dark matter annihilation showing the possibility to test these predictions in the near future at gamma-ray telescopes such as CTA. We investigate all processes contributing to the total photon flux from dark matter annihilation and point out the unique features that can be used to test this theory for dark matter.