Hadronically decaying heavy dark matter and high-energy neutrino limits

TL;DR

This paper investigates the limits on high-energy neutrino flux from decaying heavy dark matter particles with masses between 10^7 and 10^16 GeV, using IceCube and Pierre Auger data, to constrain dark matter properties.

Contribution

It provides new upper limits on neutrino flux from hadronically decaying dark matter across a wide mass range, improving constraints especially around 10^8 GeV.

Findings

Constraints on dark matter decay are stronger than gamma-ray limits at ~10^8 GeV.

Derived upper limits on neutrino flux from dark matter decay.

Dark matter parameter space is constrained using recent neutrino data.

Abstract

We consider dark matter consisting of long--living particles with masses $10^{7}~\lesssim~M~\lesssim~10^{16}$ GeV decaying through hadronic channel as a source of high energy neutrino. Using recent data on high energy neutrino from IceCube and Pierre Auger experiments we derive the upper-limits on neutrino flux from dark matter decay and constraints on dark matter parameter space. For the dark matter masses of order $10^8$ GeV the constraints derived are slightly stronger than those obtained for the same dark matter model using the high energy gamma-ray limits.