Rate for annihilation of galactic dark matter into two photons

Details Rate for annihilation of galactic dark matter into two photons Rate for annihilation of galactic dark matter into two photons

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989stin...8926792g&link_type=abstract

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Annihilation Reactions, Dark Matter, Galactic Cosmic Rays, Gamma Ray Observatory, Gamma Ray Telescopes, Photons, Energetic Particles, Halos, Radiation Detectors, Satellite-Borne Instruments, Spaceborne Telescopes

Scientific paper

A calculation of the cross section for neutralino-neutralino annihilation into two photons is performed and applied to dark matter in the galactic halo to find the counting rate in a large gamma ray detector such as EGRET (Energetic Gamma Ray Experiment Telescope) or ASTROGAM. Combining constraints from particle accelerators with the requirement that the neutralinos make up the dark matter, it is found that rates of over a few dozen events per year are unlikely. The assumptions that go into these conclusions are listed. Other particle dark matter candidates which could give larger and perhaps observable signals are suggested.

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