Document Type
Article
Publication Date
7-18-2011
Abstract
The T2K experiment observes indications of νμ→ν e appearance in data accumulated with 1.43×1020 protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with |Δm232|=2.4×10⊃- 3eV2, ⊃sin⊃ 22θ23=1 and ⊃sin⊃ 22θ13=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⊃ 22θ13<0.28(0.34) for δCP= 0 and a normal (inverted) hierarchy.
Publication Source (Journal or Book title)
Physical Review Letters
Recommended Citation
Abe, K., Abgrall, N., Ajima, Y., Aihara, H., Albert, J., Andreopoulos, C., Andrieu, B., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Badertscher, A., Barbi, M., Barker, G., Barr, G., Bass, M., Bay, F., Bentham, S., Berardi, V., Berger, B., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., & Bhadra, S. (2011). Indication of electron neutrino appearance from an accelerator-produced off-axis muon neutrino beam. Physical Review Letters, 107 (4) https://doi.org/10.1103/PhysRevLett.107.041801