Search for sharp neutrino features from dark matter decay

TL;DR

This paper reviews a search for sharp neutrino spectral features from dark matter decay using IceCube data, finding no signal but setting improved limits that are comparable to gamma-ray constraints.

Contribution

It presents the first comprehensive analysis of sharp neutrino features from dark matter decay with IceCube, improving existing limits and comparing them to gamma-ray constraints.

Findings

No significant neutrino signal detected

Established new, more stringent limits on dark matter decay

Limits are comparable to gamma-ray constraints

Abstract

The discovery of a neutrino line or, more broadly, a sharp feature in neutrino data could provide a striking hint for the existence of the dark matter particle. We review here a search for sharp spectral features using neutrino data from IceCube. No significant hint for a signal from decaying dark matter was found in the analysed dataset. Yet, we show a strong improvement of the limits, which makes it worth discussing how they compare to the limits obtained from gamma-ray data.