Sterile neutrino dark matter in $B-L$ extension of the standard model and galactic 511 keV line

Details Sterile neutrino dark matter in $B-L$ extension of the standard model and galactic 511 keV line Sterile neutrino dark matter in $B-L$ extension of the standard model and galactic 511 keV line

2008-04-02

arxiv.org/abs/0804.0336v2

JCAP 0810:024,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 figure, references added, final version appeared in JCAP

Scientific paper

10.1088/1475-7516/2008/10/024

Sterile right-handed neutrinos can be naturally embedded in a low scale gauged $U(1)_{B-L}$ extension of the standard model. We show that, within a low reheating scenario, such a neutrino is an interesting candidate for dark matter. We emphasize that if the neutrino mass is of order of MeV, then it accounts for the measured dark matter relic density and also accommodates the observed flux of 511 keV photons from the galactic bulge.

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