Search for a diffuse flux of high-energy neutrinos with the NT200 neutrino telescope

Details Search for a diffuse flux of high-energy neutrinos with the NT200 neutrino telescope Search for a diffuse flux of high-energy neutrinos with the NT200 neutrino telescope

2005-07-29

arxiv.org/abs/astro-ph/0507712v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, Proceedings of 29th International Cosmic Ray Conference (ICRC) 2005, Pune, India

Scientific paper

We present the results of a search for high energy extraterrestrial neutrinos with the Baikal underwater Cherenkov detector NT200, based on data taken in 1998 - 2002 (1038 live days).Upper limits on the diffuse fluxes of \nu_e+\nu_{\mu}+\nu_{\tau}, predicted by several models of AGN-like neutrino sources, are derived. For an E^{-2} behavior of the neutrino spectrum, our limit is E^2 \Phi_{\nu}(E)<8.1 10^{-7} cm^{-2} s^{-1} sr^{-1} GeV over a neutrino energy range 2 10^4 - 5 10^7 GeV covering 90% of expected events. The upper limit on the resonant \bar{\nu}_e diffuse flux is \Phi_{\bar{\nu}_e} < 3.3 10^{-20} cm^{-2}s^{-1}sr^{-1}GeV^{-1}.

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