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

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

P. Keranen
(
- Nordita
)
,
J. Maalampi
(
- Jyvaskyla U. and
- Helsinki Inst. of Phys.
)
,
M. Myyrylainen
(
- Jyvaskyla U.
)
,
J. Riittinen
(
- Jyvaskyla U.
)

Jul, 2003

7 pages

Published in:

Phys.Lett.B 574 (2003) 162-168

Published: 2003

e-Print:

hep-ph/0307041 [hep-ph]

DOI:

10.1016/j.physletb.2003.09.006

Report number:

JYFL-HE-8-2003,
NORDITA-2003-50HEP

View in:

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Abstract:

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.

Note:

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

neutrino: cosmic radiation
neutrino: flux
neutrino: energy spectrum
neutrino: sterile
neutrino: flavor
neutrino: mass difference
neutrino: mixing angle
neutrino: oscillation
neutrino/e: flux
neutrino/mu: flux

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