Atmospheric Neutrinos, Astrophysical Neutrons, and Proton-Decay Experiments

Abstract

Simple analytical estimates of the fluxes of atmospheric muons and neutrinos are presented. It is shown that the geomagnetic field strongly suppresses the fluxes of atmospheric neutrinos below 1 GeV from directions of low magnetic latitudes and may open a window for neutrino astronomy. The validity of these estimates is demonstrated through indirect tests.