Probing the stability of superheavy dark matter particles with high-energy neutrinos

TL;DR

This paper establishes lower bounds on the lifetime of superheavy dark matter particles, using non-observation of ultrahigh energy neutrinos across multiple experiments, constraining particle physics models and decay interactions.

Contribution

It provides new lower limits on dark matter particle lifetime over a wide mass range and analyzes decay interaction strengths in specific particle physics scenarios.

Findings

Dark matter lifetime must exceed 10^26-10^28 seconds for masses 10 TeV to GUT scale.

Non-observation of ultrahigh energy neutrinos constrains dark matter decay properties.

Limits on decay interaction strengths are derived for specific models.

Abstract

Two of the most fundamental properties of the dark matter particle, the mass and the lifetime, are only weakly constrained by the astronomical and cosmological evidence of dark matter. We derive in this paper lower limits on the lifetime of dark matter particles with masses in the range 10 TeV-10^15 TeV from the non-observation of ultrahigh energy neutrinos in the AMANDA, IceCube, Auger and ANITA experiments. For dark matter particles which produce neutrinos in a two body or a three body decay, we find that the dark matter lifetime must be longer than O(10^26-10^28) s for masses between 10 TeV and the Grand Unification scale. Finally, we also calculate, for concrete particle physics scenarios, the limits on the strength of the interactions that induce the dark matter decay.