Publications [#303761] of Christopher Walter

Papers Published
  1. Collaboration, T; Abgrall, N; Aihara, H; Akiri, T; Albert, JB; Andreopoulos, C; Aoki, S; Ariga, A; Ariga, T; Assylbekov, S; Autiero, D; Barbi, M; Barker, GJ; Barr, G; Bass, M; Batkiewicz, M; Bay, F; Bentham, SW; Berardi, V; Berger, BE; Berkman, S; Bertram, I; Beznosko, D; Bhadra, S; Blaszczyk, FDM; Blondel, A; Bojechko, C; Boyd, S; Brailsford, D; Bravar, A; Bronner, C; Brook-Roberge, DG; Buchanan, N; Calland, RG; Rodriguez, JC; Cartwright, SL; Castillo, R; Catanesi, MG; Cervera, A; Cherdack, D et al., Evidence of Electron Neutrino Appearance in a Muon Neutrino Beam, vol. D88 (April, 2013), pp. 032002 [1304.0841v2], [doi] .

    The T2K collaboration reports evidence for electron neutrino appearance at the atmospheric mass splitting, |\Delta m_32^2|=2.4x10^{-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\pm0.4(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 |\Delta m_32^2|=2.4x10^{-3} eV^2 yields sin^2(2\theta_13)=0.088^{+0.049}_{-0.039}(stat.+syst.).