Axinos as Light Dark Matter

Details Axinos as Light Dark Matter Axinos as Light Dark Matter

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..878..158k&link_type=abstract

THE DARK SIDE OF THE UNIVERSE: 2nd International Conference on The Dark Side of the Universe DSU 2006. AIP Conference Proceedin

Other

Dark Matter, Elementary Particle Processes, Charge Conjugation, Parity, Time Reversal, And Other Discrete Symmetries

Scientific paper

We consider the axino, whose mass can be in the 1 - 10 MeV range, as the light dark matter which can explain the recently observed 511 keV γ-ray line emissions from the galactic bulge through its decay. We discuss the cosmological production and constraints for the axino light dark matter. It is shown that the bilinear R-parity violating terms provide an appropriate mixing between the axino and neutrinos so that the light axino decays dominantly to e+e-v. One appealing point of the axino light dark matter is that the same bilinear R-parity violations consistently give both the lifetime of the axino required to explain the observed 511 keV γ-rays and the observed neutrino masses and mixing.

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