Indication of Electron Neutrino Appearance from an Accelerator-Produced Off-Axis Muon Neutrino Beam
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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) < sin(2)2θ(13) < 0.28(0.34) for δ(CP) = 0 and a normal (inverted) hierarchy.
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The record
- Venue
- Physical Review Letters
- Topic
- Neutrino Physics Research
- Field
- Physics and Astronomy
- Canadian institutions
- Institute of Particle PhysicsUniversity of AlbertaTRIUMFYork UniversityUniversity of British ColumbiaUniversity of ReginaUniversity of VictoriaUniversity of Toronto
- Funders
- Institut National de Physique Nucléaire et de Physique des ParticulesDeutsches Elektronen-SynchrotronScience and Technology Facilities CouncilCentre National de la Recherche ScientifiqueMinistry of Education, Culture, Sports, Science and TechnologyMinistry of Education and Science of the Russian FederationJapan Society for the Promotion of ScienceRussian Foundation for Basic ResearchMinisterio de Ciencia e InnovaciónDeutsche ForschungsgemeinschaftCERNNatural Sciences and Engineering Research Council of CanadaAlfred P. Sloan FoundationSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungU.S. Department of EnergyNational Science Foundation
- Keywords
- PhysicsNeutrino oscillationNeutrinoMuonElectron neutrinoNuclear physicsParticle physicsMuon neutrinoElectronOscillation (cell signaling)LeptonCathode rayNeutrino detector
- Has abstract in OpenAlex
- yes