Ultra high energy cosmic ray neutrinos

Details Ultra high energy cosmic ray neutrinos Ultra high energy cosmic ray neutrinos

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phlb..131..247h&link_type=abstract

Physics Letters B, Volume 131, Issue 1-3, p. 247-252.

Physics

46

Scientific paper

Neutrinos, produced by the collisions of ultra high energy cosmic rays and the 3 K background radiation, require careful treatment of the evolving cosmic ray spectrum. The resulting neutrino differential energy spectrum is flat up to energies of order 1019eV, thus most events are expected at this energy. The total νe-flux should be significantly larger than the proton flux at ~5 × 1019eV when the recoil proton is correctly treated in photomeson production and when the Bethe-Heitler process (e+e- pair production) is incorporated. Based upon the observed primary proton spectrum we obtain a lower limit on the neutrino flux of ~5.2/km2yr sr implying roughly 0.4 detected upward moving events per year in the present Fly's Eye range of sensitivity.

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