Search for sharp neutrino features from dark matter decay

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.