High energy gamma-ray lines - A probe for a cold dark matter halo

Details High energy gamma-ray lines - A probe for a cold dark matter halo High energy gamma-ray lines - A probe for a cold dark matter halo

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..232..458s&link_type=abstract

IN: Gamma-ray line astrophysics; Proceedings of the International Symposium, Paris, France, Dec. 10-13, 1990 (A92-43619 18-90).

Astronomy and Astrophysics

Astrophysics

Annihilation Reactions, Cos-B Satellite, Dark Matter, Energy Spectra, Gamma Ray Spectra, Compton Effect, Fermions, Milky Way Galaxy, Neutrinos, Quarks

Scientific paper

The possibility of detecting halo cold dark matter through the annihilation process chi-chi to gamma-gamma is studied. This process produces monoenergetic gamma-rays, and may be a clear signature of particle dark matter. If there is a closure density of photino (so far a favored candidate) it is shown that it will be very difficult to observe this annihilation line from a satellite or space station borne experiment. On the contrary, triplet neutrinos which have recently been suggested as a plausible solution to the dark matter conundrum, while elusive at accelerators, should produce a clear gamma-ray line signal, well above background.

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