Flux of atmospheric neutrinos

Abstract

We have repeated a one-dimensional calculation of neutrino fluxes, including the effect of muon polarization on neutrinos from the decay of muons. Fluxes have been calculated as a function of energy and angle with cutoffs appropriate for locations of five deep nucleon-decay experiments. Overall, the ${\ensuremath{\nu}}_{e}$/${\ensuremath{\nu}}_{\ensuremath{\mu}}$ ratio increases by 5% (20%) for neutrinos with energies around 200 MeV (2--3 GeV), in agreement with a previous analytic estimate of the effect.