MeV Right-handed Neutrinos and Dark Matter

Abstract

We consider the possibility of having a MeV right-handed neutrino as a dark matter constituent. The initial reason for this study was the 511 keV spectral line observed by the satellite experiment INTEGRAL: could it be due to an interaction between dark matter and baryons? Independently of this, we find a number of constraints on the assumed right-handed interactions. They arise in particular from the measurements by solar neutrino experiments. We come to the conclusion that such particles interactions are possible, and could reproduce the peculiar angular distribution, but not the rate of the INTEGRAL signal. However, we stress that solar neutrino experiments are susceptible to provide further constraints in the future.

7 pages, figure 1 changed, added references

References in corpus (3)

• 511 KeV photons from superconducting cosmic strings
• Light Dark Matter Annihilations into Two Photons
• Light superconducting strings in the Galaxy

Cited by in corpus (7)

• The DAMA/LIBRA apparatus
• Constraining DM properties with SPI
• The galactic 511 keV line from electroweak scale WIMPs
• Galactic 511 keV line from MeV millicharged dark matter
• MeV sterile neutrinos in low reheating temperature cosmological scenarios
• Primordial black holes and the observed Galactic 511 keV line
• Liquid Noble gases for Dark Matter searches: a synoptic survey