Atmospheric Neutrinos

Abstract EN

Atmospheric neutrinos are produced as decay products in hadronic showers resulting from collisions of cosmic rays with nuclei in the atmosphere.

Electron-neutrinos and muon-neutrinos are produced mainly by the decay chain of charged pions to muons to electrons.

Atmospheric neutrino experiments observed zenith angle and energy-dependent deficit of muon-neutrino events.

It was found that neutrino oscillations between muon-neutrinos and tau-neutrinos explain these data well.

This paper discusses atmospheric neutrino experiments and the neutrino oscillation studies with these neutrinos.