Getting the Most From Atmospheric Neutrinos

Abstract

Observations of atmospheric neutrinos by the SuperKamiokande collaboration have demonstrated large mixing of the muon-neutrino. However the present atmospheric neutrino data does not significantly constrain the associated mixing of the electron-neutrino, or the sign of the mass-squared difference. Here we identify the diagnostics for these quantities and they also test the theory of how matter affects neutrino oscillations. These diagnostics are a dip in the sub-GeV muon flux at a zenith angle of 110 degrees, a bump in the electron up-down asymmetry at multi-GeV energies and a bump in the muon-antimuon upward asymmetry.

13 pages, 2 figures To be published in Physical Review Letters

References in corpus (2)

• Initial Results from the CHOOZ Long Baseline Reactor Neutrino Oscillation Experiment
• Atmospheric neutrino oscillations with three neutrinos and a mass hierarchy

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