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 ($\nu_e+\tilde{\nu_e}$) diffuse flux of $E^2 \Phi_{\nu}(E)<(1.3 \div 1.9)\cdot 10^{-6} {cm}^{-2} {s}^{-1} {sr}^{-1} {GeV}$ within a neutrino energy range $10^4 \div 10^7 {GeV}$ is obtained, assuming an $E^{-2}$ behaviour of the neutrino spectrum and flavor ratio $(\nu_e+\tilde{\nu_e}):(\nu_{\mu}+\tilde{\nu_{\mu}})$=1:2.