Publications [#248757] of Christopher Walter

Papers Published
  1. Abe, K; Abgrall, N; Ajima, Y; Aihara, H; Albert, JB; Andreopoulos, C; Andrieu, B; Anerella, MD; Aoki, S; Araoka, O; Argyriades, J; Ariga, A; Ariga, T; Assylbekov, S; Autiero, D; Badertscher, A; Barbi, M; Barker, GJ; Barr, G; Bass, M; Batkiewicz, M; Bay, F; Bentham, S; Berardi, V; Berger, BE; Bertram, I; Besnier, M; Beucher, J; Beznosko, D; Bhadra, S; Blaszczyk, FDMM; Blondel, A; Bojechko, C; Bouchez, J; Boyd, SB; Bravar, A; Bronner, C; Brook-Roberge, DG; Buchanan, N; Budd, H; Calland, RG et al., First muon-neutrino disappearance study with an off-axis beam, Physical Review D, vol. 85 no. 3 (2012), pp. 031103 [pdf], [doi] .

    We report a measurement of muon-neutrino disappearance in the T2K experiment. The 295-km muon-neutrino beam from Tokai to Kamioka is the first implementation of the off-axis technique in a long-baseline neutrino oscillation experiment. With data corresponding to 1.43×1020 protons on target, we observe 31 fully-contained single μ-like ring events in Super-Kamiokande, compared with an expectation of 104±14(syst) events without neutrino oscillations. The best-fit point for two-flavor ν μ→ν τ oscillations is sin2(2θ 23)=0.98 and |Δm322|=2.65×10 -3eV2. The boundary of the 90% confidence region includes the points ( sin2(2θ 23), |Δm322|)=(1.0,3.1×10 -3eV2), (0.84, 2.65×10 -3eV2) and (1.0, 2.2×10 -3eV2). © 2012 American Physical Society.