A search for very high energy neutrinos with the Baikal Neutrino Telescope

Abstract

We present the results of a search for high energy neutrinos with the Baikal underwater Cherenkov detector {\it NT-200.} An upper limit on the (${\nu }_e+\widetilde{{\nu }_e}$) diffuse flux of $E^2{\Phi }_{\nu }(E)<(1.3÷1.9)\cdot 10^{-6}{cm}^{-2}{s}^{-1}{sr}^{-1}GeV$ within a neutrino energy range $10^4÷10^{7}GeV$ is obtained, assuming an $E^{-2}$ behaviour of the neutrino spectrum and flavor ratio $({\nu }_e+\widetilde{{\nu }_e}):({\nu }_{\mu }+\widetilde{{\nu }_{\mu }})$=1:2.

11 pages, 7 figures, to be published in the proceedings of the 9th International Workshop: "Neutrino Telescopes", Venice, Italy, March 6-9, 2001