Limits to the flux of ultra-high-energy cosmic rays from exotic phenomena in the galactic halo

Details Limits to the flux of ultra-high-energy cosmic rays from exotic phenomena in the galactic halo Limits to the flux of ultra-high-energy cosmic rays from exotic phenomena in the galactic halo

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jphg...26.1033w&link_type=abstract

Journal of Physics G: Nuclear and Particle Physics, Volume 26, Issue 7, pp. 1033-1047 (2000).

Physics

5

Scientific paper

A detailed analysis is made of the likelihood of extragalactic cosmic-ray particles above 1019 eV having come from the decay of dark-matter particles or neutrino-neutrino annihilations in the galactic halo. Even if we accept the most optimistic assumptions it is difficult to account for more than about 50% of the observed intensity having been produced by the decay of dark-matter particles; the preferred model with a one-standard-deviation limit gives a figure of only 15%. For neutrino-neutrino annihilations the corresponding value is about 20%.

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