# Decaying dark matter at IceCube and its signature on High Energy gamma experiments

## TL;DR

This paper investigates whether decaying dark matter could explain IceCube neutrino observations by analyzing multimessenger data from neutrinos and gamma rays, and assesses future gamma-ray experiments' potential to test this hypothesis.

## Contribution

It provides a comprehensive multimessenger analysis of decaying dark matter models using IceCube and Fermi data, and explores future gamma-ray experiments' capabilities.

## Key findings

- Decaying dark matter models are consistent with IceCube data within certain parameter ranges.
- Fermi gamma-ray data constrains some dark matter decay channels.
- Future gamma-ray experiments could further test the dark matter hypothesis.

## Abstract

The origin of neutrino flux observed in IceCube is still mainly unknown. Typically two flux components are assumed, namely: atmospheric neutrinos and an unknown astrophysical term. In principle the latter could also contain a top-down contribution coming for example from decaying dark matter. In this case one should also expect prompt and secondary gammas as well. This leads to the possibility of a multimessenger analysis based on the simultaneous comparison of the Dark Matter hypothesis both with neutrino and high energy gamma rays data. In this paper, we analyze, for different decaying Dark Matter channels, the 7.5 years IceCube HESE data, and compare the results with previous exclusion limits coming from Fermi data. Finally, we test whether the Dark Matter hypothesis could be further scrutinised by using forthcoming high energy gamma rays experiments.