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

Journal Article · Wed Oct 15 00:00:00 EDT 2008 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2008/10/024· OSTI ID:22156782

Khalil, Shaaban ^[1]; Seto, Osamu ^[2]

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1. Centre for Theoretical Physics, The British University in Egypt, El Sherouk City, Postal No. 11837, PO Box 43 (Egypt)
2. Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, Cantoblanco, Madrid 28049 (Spain)

Sterile right-handed neutrinos can be naturally embedded in a low scale gauged U(1){sub B-L} extension of the standard model. We show that, within a low reheating scenario, such a neutrino is an interesting dark matter candidate. We emphasize that if the neutrino mass is of the 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.

• OSTI ID: 22156782
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2008, Issue 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
KEV RANGE
NEUTRINOS
NONLUMINOUS MATTER
PHOTONS
RELICT RADIATION
STANDARD MODEL
U-1 GROUPS