%0 Journal Article
%T Evidence of electron neutrino appearance in a muon neutrino beam
%A T2K Collaboration (Abe, K. et al
%A Cervera-Villanueva, A.
%A Escudero, L.
%A Gomez-Cadenas, J. J.
%A Izmaylov, A.
%A Monfregola, L.
%A Sorel, M.
%A Stamoulis, P.
%J Physical Review D
%D 2013
%V 88
%N 3
%I Amer Physical Soc
%@ 1550-7998
%G English
%F T2KCollaborationAbe_etal2013
%O WOS:000322797500004
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1550), last updated on Wed, 11 Feb 2015 11:56:57 +0000
%X The T2K Collaboration reports evidence for electron neutrino appearance at the atmospheric mass splitting, vertical bar Delta m(32)(2)vertical bar approximate to 2.4 X 10(-3) eV(2). An excess of electron neutrino interactions over background is observed from a muon neutrino beam with a peak energy of 0.6 GeV at the Super-Kamiokande (SK) detector 295 km from the beam's origin. Signal and background predictions are constrained by data from near detectors located 280 m from the neutrino production target. We observe 11 electron neutrino candidate events at the SK detector when a background of 3.3 +/- 0.4(syst) events is expected. The background-only hypothesis is rejected with a p value of 0.0009 (3.1 sigma), and a fit assuming nu(mu) -> nu(e) oscillations with sin (2)2 theta(23) = 1, delta(CP) = 0 and vertical bar Delta m(32)(2)vertical bar = 2.4 X 10(-3) eV(2) yields sin (2)2 theta(13) = 0.088(-0.039)(+0.049)(stat + syst).
%R 10.1103/PhysRevD.88.032002
%U http://arxiv.org/abs/arXiv:1304.0841
%U https://doi.org/10.1103/PhysRevD.88.032002
%P 032002-41pp