Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-12-17
Astropart.Phys.18:581-592,2003
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 4 figures, comparison with atmospheric tau neutrino flux added
Scientific paper
10.1016/S0927-6505(02)00183-4
We compare the tau neutrino flux arising from the galaxy and the earth atmosphere for 10^3 < E/GeV < 10^11. The intrinsic and oscillated tau neutrino fluxes from both sources are calculated. The intrinsic galactic \nu_{\tau} flux (E > 10^3 GeV) is calculated by considering the interactions of high-energy cosmic-rays with the matter present in our galaxy, whereas the oscillated galactic \nu_{\tau} flux is coming from the oscillation of the galactic \nu_{\mu} flux. For the intrinsic atmospheric \nu_{\tau} flux, we extend the validity of a previous calculation from E < 10^6 GeV up to E < 10^11 GeV. The oscillated atmospheric \nu_{\tau} flux is, on the other hand, rather suppressed. We find that, for 10^3 < E/GeV < 5\cdot 10^7, the oscillated \nu_{\tau} flux along the galactic plane dominates over the maximal intrinsic atmospheric \nu_{\tau} flux, i.e., the flux along the horizontal direction. We also briefly mention the presently envisaged prospects for observing these high-energy tau neutrinos.
Athar Husain
Cheung Kingman
Lin Guey-Lin
Tseng Jie-Jun
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