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Strategy for Searching for a Dark Matter Sterile Neutrino

Neronov, A.; Boyarsky, A.; Ruchayskiy, O. +2 more

We propose a strategy for how to look for dark matter particles possessing a radiative decay channel and derive constraints on their parameters from observations of x rays from our own Galaxy and its dwarf satellites. When applied to sterile neutrinos in the keV mass range this approach gives a significant improvement to restrictions on neutrino p…