Neutrino Signals from Dark Matter Decay

TL;DR

This paper explores the potential for detecting neutrino signals from dark matter decay, aiming to identify spectral signatures that could confirm dark matter's role in cosmic phenomena and distinguish decay channels.

Contribution

It assesses the detectability of neutrino signals from dark matter decay and discusses how spectral features could confirm dark matter origins and differentiate decay channels.

Findings

Neutrino signals from dark matter decay could be detectable with current or future observatories.

Spectral signatures may help distinguish dark matter decay from astrophysical sources.

Combining neutrino data with other signals can identify decay channels.

Abstract

We investigate different neutrino signals from the decay of dark matter particles to determine the prospects for their detection, and more specifically if any spectral signature can be disentangled from the background in present and future neutrino observatories. If detected, such a signal could bring an independent confirmation of the dark matter interpretation of the dramatic rise in the positron fraction above 10 GeV recently observed by the PAMELA satellite experiment and offer the possibility of distinguishing between astrophysical sources and dark matter decay or annihilation. In combination with other signals, it may also be possible to distinguish among different dark matter decay channels.