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

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvd..40.2549g&link_type=abstract

Physical Review D (Particles and Fields), Volume 40, Issue 8, 15 October 1989, pp.2549-2558

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36

Supersymmetric Partners Of Known Particles, Gamma-Ray Sources, Gamma-Ray Bursts

Scientific paper

We perform a calculation of the cross section for neutralino-neutralino annihilation into two photons and apply it to dark matter in the galactic halo to find the counting rate in a large γ-ray detector such as EGRET or ASTROGAM. Combining constraints from particle accelerators with the requirement that the neutralinos make up the dark matter we find that rates over a few dozen events per year are unlikely. We list the assumptions that go into our conclusions and suggest other particle dark-matter candidates which could give larger and perhaps observable signals.

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