Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-01-12
JETP Lett. 83 (2006) 133-135
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages. revtex4
Scientific paper
10.1134/S0021364006040011
In an extention of the Standard Model by three relatively light right-handed neutrinos (the nuMSM model) the role of the dark matter particle is played by the lightest sterile neutrino. We demonstrate that the observations of the extragalactic X-ray background allow to put a strong upper bound on the mass of the lightest active neutrino and predict the absolute values of the mass of the two heavier active neutrinos in the nuMSM, provided that the mass of the dark matter sterile neutrino is larger than 1.8 keV.
Boyarsky Alexey
Neronov Andrey
Ruchayskiy Oleg
Shaposhnikov Mikhail
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