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Evidence for Muon Neutrino Oscillation in an Accelerator-Based Experiment

Authors
Journal
Physical Review Letters
0031-9007
Publisher
American Physical Society
Volume
94
Issue
8
Identifiers
DOI: 10.1103/physrevlett.94.081802
Disciplines
  • Physics

Abstract

We present results for νμ oscillation in the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment. K2K uses an accelerator-produced νμ beam with a mean energy of 1.3 GeV directed at the Super-Kamiokande detector. We observed the energy-dependent disappearance of vmu;, which we presume have oscillated to ντ. The probability that we would observe these results if there is no neutrino oscillation is 0.0050% (4.0σ).

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