# Gamma-rays and LHC-inspired dark matter

## TL;DR

This paper investigates whether gamma-ray emissions from the Milky Way and Andromeda galaxies can be explained by dark matter annihilation linked to the Madala hypothesis, finding significant constraints on the model.

## Contribution

It analyzes the compatibility of Madala hypothesis WIMPs with gamma-ray observations, providing new constraints on the model's parameters and decay channels.

## Key findings

- Gamma-ray emissions are incompatible with dark matter annihilation under Higgs-like mediator assumptions.
- Compatibility requires steeply contracted NFW profiles or WIMP masses above 1 TeV.
- Results are consistent across various model-independent scenarios.

## Abstract

The Madala hypothesis was formulated to explain anomalies in LHC data from run-1. Subsequently, these anomalies have endured into run-2 and been strengthened. This makes the analysis of the proposal highly pertinent, and, since some of the properties of the model are beyond the reach of current collider data it is also important to determine alternative means of analysis. Here, we examine the consequences of WIMPs linked to the Madala hypothesis providing a dark matter candidate and annihilating in the galactic centre of the Milky-Way and the Andromeda galaxy. These targets have been observed to have similar gamma-ray spectra by Fermi-LAT and their emissions have been widely discussed in terms of dark matter annihilation in the literature. We show that, when the decay branchings of the hidden-sector mediator in the Madala hypothesis are assumed Higgs-like, the emissions of Andromeda and the Milky-Way are not compatible with both being produced by dark matter annihilation, apart from when a steeply contracted NFW profile is assumed for the halos or the WIMP has a mass above 1 TeV. Additionally, similar results are displayed for a wide variety of model independent cases