A Measurement of Atmospheric Neutrino Oscillation Parameters by Super-Kamiokande I

Abstract

We present a combined analysis of fully-contained, partially-contained and upward-going muon atmospheric neutrino data from a 1489 day exposure of the Super--Kamiokande detector. The data samples span roughly five decades in neutrino energy, from 100 MeV to 10 TeV. A detailed Monte Carlo comparison is described and presented. The data is fit to the Monte Carlo expectation, and is found to be consistent with neutrino oscillations of ${\nu }_{\mu }\leftrightarrow {\nu }_{\tau }$ with ${\sin }^{2}2\theta >0.92$ and $1.5\times 10^{-3}<\Delta m^2<3.4\times 10^{-3}{\mathrm{eV}}^2$ at 90% confidence level.

32 pages, 44 figures. As accepted for publication in Physical Review D