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Constraints on sterile neutrino as a dark matter candidate from the diffuse X-ray background

A. Boyarsky·A. Neronov·O. Ruchayskiy·M. Shaposhnikov
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Abstract

Sterile neutrinos with masses in the keV range are viable candidates for the warm dark matter. We analyze existing data for the extragalactic diffuse X-ray background for signatures of sterile neutrino decay. The absence of detectable signal within current uncertainties of background measurements puts model-independent constraints on allowed values of sterile neutrino mass and mixing angle, which we present in this work.

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A. Boyarsky, A. Neronov, O. Ruchayskiy, M. Shaposhnikov. 2006-04-27. Constraints on sterile neutrino as a dark matter candidate from the diffuse X-ray background. https://doi.org/10.1111/j.1365-2966.2006.10458.x

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