The potential of diffuse Galactic Ridge neutrino measurements to constrain dark matter

TL;DR

This paper analyzes ANTARES neutrino data from the Galactic Ridge to constrain dark matter models, comparing fluxes across profiles and models, and predicting future observatory capabilities.

Contribution

It systematically evaluates dark matter scenarios using neutrino measurements, including novel models like branons and sterile neutrinos, and assesses the impact of different density profiles.

Findings

Neutrino flux measurements can constrain dark matter annihilation and decay scenarios.

Different dark matter density profiles significantly affect the expected neutrino signals.

Future neutrino observatories could improve constraints on dark matter properties.

Abstract

We use the latest ANTARES Galactic Ridge neutrino measurements to investigate their implications for indirect dark matter (DM) searches. We consider both annihilating and decaying DM scenarios, spanning a wide range of masses and final states, and systematically compare the resulting neutrino fluxes with the expected astrophysical Galactic diffuse emission. Furthermore, we compare the results for different DM density profiles allowed by the observations, from spike and cuspy to cored profiles. We do so for the WIMP model-independent scenario and explore two more specific models: branons and very heavy sterile neutrinos, where a cold DM candidate arises naturally from the theory. We show the potential neutrino measurements in the Galactic Ridge for DM and make predictions for future neutrino observatories.