Strategy for searching for a dark matter sterile neutrino.
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 parameters compared with previous works.
Boyarsky
A
A
CERN/PH-TH, CH-1211 Geneva 23, Switzerland and Ecole Polytechnique Fédérale de Lausanne, CH-1015, Switzerland.
Neronov
A
A
Ruchayskiy
O
O
Shaposhnikov
M
M
Tkachev
I
I