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



Abe, K, Abgrall, N, Ajima, Y, Aihara, H, Albert, JB, Andreopoulos, C ORCID: 0000-0003-2020-8215, Andrieu, B, Aoki, S, Araoka, O, Argyriades, J
et al (show 401 more authors) (2011) Indication of Electron Neutrino Appearance from an Accelerator-Produced Off-Axis Muon Neutrino Beam. PHYSICAL REVIEW LETTERS, 107 (4). 041801-.

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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.

Item Type: Article
Additional Information: 20 pages, 6 figures, version published in PRL
Uncontrolled Keywords: T2K Collaboration
Depositing User: Symplectic Admin
Date Deposited: 08 Apr 2016 14:48
Last Modified: 16 Dec 2022 17:03
DOI: 10.1103/PhysRevLett.107.041801
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3000086