Physics potential of a long-baseline neutrino oscillation experiment using a J-PARC neutrino beam and Hyper-Kamiokande
© The Author(s) 2015. Hyper-Kamiokande will be a next-generation underground water Cherenkov detector with a total (fiducial) mass of 0.99 (0.56) million metric tons, approximately 20 (25) times larger than that of Super-Kamiokande. One of the main goals of Hyper-Kamiokande is the study of CP asymmetry in the lepton sector using accelerator neutrino and anti-neutrino beams. In this paper, the physics potential of a long-baseline neutrino experiment using the Hyper- Kamiokande detector and a neutrino beam from the J-PARC proton synchrotron is presented. The analysis uses the framework and systematic uncertainties derived from the ongoing T2K experiment. With a total exposure of 7.5MW ×10 7 s integrated proton beam power (corresponding to 1.56 × 10 22 protons on target with a 30 GeV proton beam) to a 2.5° off-axis neutrino beam, it is expected that the leptonic CP phase δ CP can be determined to better than 19 degrees for all possible values of δ CP , and CP violation can be established with a statistical significance of more than 3 σ (5 σ) for 76% (58%) of the δ CP parameter space. Using both ν e appearance and νμ disappearance data, the expected 1 σ uncertainty of sin 2 Θ 23 is 0.015(0.006) for sin 2 Θ 23 = 0.5(0.45).
Abe, K; Aihara, H; Andreopoulos, C; Anghel, I; Ariga, A; Ariga, T; Asfandiyarov, R; Askins, M; Back, JJ; Ballett, P; Barbi, M; Barker, GJ; Barr, G; Bay, F; Beltrame, P; Berardi, V; Bergevin, M; Berkman, S; Berry, T; Bhadra, S; Blaszczyk, FDM; Blondel, A; Bolognesi, S; Boyd, SB; Bravar, A; Bronner, C; Cafagna, FS; Carminati, G; Cartwright, SL; Catanesi, MG; Choi, K; Choi, JH; Collazuol, G; Cowan, G; Cremonesi, L; Davies, G; De Rosa, G; Densham, C; Detwiler, J; Dewhurst, D; Di Lodovico, F; Di Luise, S; Drapier, O; Emery, S; Ereditato, A; Fernández, P; Feusels, T; Finch, A; Fitton, M; Friend, M; Fujii, Y; Fukuda, Y; Fukuda, D; Galymov, V; Ganezer, K; Gonin, M; Gumplinger, P; Hadley, DR; Haegel, L; Haesler, A; Haga, Y; Hartfiel, B; Hartz, M; Hayato, Y; Hierholzer, M; Hill, J; Himmel, A; Hirota, S; Horiuchi, S; Huang, K; Ichikawa, AK; Iijima, T; Ikeda, M; Imber, J; Inoue, K; Insler, J; Intonti, RA; Irvine, T; Ishida, T; Ishino, H; Ishitsuka, M; Itow, Y; Izmaylov, A; Jamieson, B; Jang, HI; Jiang, M; Joo, KK; Jung, CK; Kaboth, A; Kajita, T; Kameda, J; Karadhzov, Y; Katori, T; Kearns, E; Khabibullin, M; Khotjantsev, A; Kim, JY; Kim, SB; Kishimoto, Y; Kobayashi, T
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