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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411Topics & keywords
Topics
Keywords
- Physics
- Neutrino oscillation
- Neutrino
- Muon
- Electron neutrino
- Nuclear physics
- Particle physics
- Muon neutrino
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Funding
- NSNational Science Foundation
- UDU.S. Department of Energy
- APAlfred P. Sloan Foundation
- CCERN
- DFDeutsche Forschungsgemeinschaft
- MOMinistry of Education, Culture, Sports, Science and Technology
- SNSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- RFRussian Foundation for Basic Research
- MOMinistry of Education and Science of the Russian Federation
- CNCentre National de la Recherche ScientifiqueAward: CNRS/IN2P3
- MDMinisterio de Ciencia e Innovación
- NSNatural Sciences and Engineering Research Council of Canada
- SAScience and Technology Facilities CouncilAwards: ST/F001924/1, ST/H00095X/1, ST/F007833/1, ST/H003517/1, T2K, ST/F00754X/1, ST/I505756/1, ST/J501074/1, ST/H001026/2, ST/G003300/1, IN2P3, ST/I00422X/1, ST/H000747/1, ST/H001026/1, PP/E000487/1, ST/F003390/1, ST/F007418/1, ST/H001085/2, ST/G003440/1, ST/F009976/1, ST/H000712/1, ST/H00095X/2
- DEDeutsches Elektronen-Synchrotron
- JSJapan Society for the Promotion of Science
- INInstitut National de Physique Nucléaire et de Physique des ParticulesAward: CNRS/IN2P3