Boyarsky, AlexeyNeronov, A.Ruchayskiy, OlegShaposhnikov, M.2010-09-072010-09-072010-09-07200610.1111/j.1365-2966.2006.10458.x2-s2.0-33746051659https://infoscience.epfl.ch/handle/20.500.14299/53048WOS:000239116800016Sterile neutrinos with masses in the kilo-electronvolt range are viable candidates for the warm dark matter. We analyse existing data for the extragalactic diffuse X-ray background for signatures of sterile neutrino decay. The absence of a detectable signal within current uncertainties of background measurements puts model-independent constraints on allowed values of the sterile neutrino mass and mixing angle, which we present in this work. © 2006 RAS.text::journal::journal article::research article