articlePhysical Review LettersJul 18, 2011BRONZE OA

Indication of Electron Neutrino Appearance from an Accelerator-Produced Off-Axis Muon Neutrino Beam

Institute for Cosmic Ray Research · The University of Tokyo · +68 more institutions

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Abstract

The T2K experiment observes indications of ν(μ) → ν(e) appearance in data accumulated with 1.43×10(20) protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with |Δm(23)(2)| = 2.4×10(-3) eV(2), sin(2)2θ(23) = 1 and sin(2)2θ(13) = 0, the expected number of such events is 1.5±0.3(syst). Under this hypothesis, the probability to observe six or more candidate events is 7×10(-3), equivalent to 2.5σ significance. At 90% C.L., the data are consistent with 0.03(0.04)

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Topics & keywords

Keywords
  • Physics
  • Neutrino oscillation
  • Neutrino
  • Muon
  • Electron neutrino
  • Nuclear physics
  • Particle physics
  • Muon neutrino
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