Effects of sterile neutrinos on the ultrahigh-energy cosmic neutrino flux

Details Effects of sterile neutrinos on the ultrahigh-energy cosmic neutrino flux Effects of sterile neutrinos on the ultrahigh-energy cosmic neutrino flux

2003-07-03

arxiv.org/abs/hep-ph/0307041v3

Phys.Lett. B574 (2003) 162-168

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 4 figures. Final version to be published in Phys. Lett. B

Scientific paper

We investigate the effect of sterile neutrinos that are nearly degenerate with active ones on the flux of ultrahigh-energy cosmic ray neutrinos at earth. This offers a way to probe neutrino oscillations in the mass-squared range (10^{-16} eV^2 < \delta m^2 < 10^{-11} eV^2) which maybe hard to detect by any other means. Taking into account the present experimental uncertainties of the active-active mixing angles and by allowing any values for the active-sterile mixing angles we find that the ratio of the electron and muon neutrino fluxes may change by -40 % to 70 % in comparison with the ratio in the absence of active-sterile mixing.

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