Neutrino oscillation physics potential of the T2K experiment
© The Author(s) 2015. The observation of the recent electron neutrino appearance in a muon neutrino beam and the high-precision measurement of the mixing angle Θ13 have led to a re-evaluation of the physics potential of the T2K long-baseline neutrino oscillation experiment. Sensitivities are explored for CP violation in neutrinos, non-maximal sin2 2Θ23, the octant of Θ23, and the mass hierarchy, in addition to the measurements of δCP, sin2 Θ23, and Δm232, for various combinations of ν-mode and ν-mode data-taking. With an exposure of 7.8 × 1021 protons-on-target, T2K can achieve 1 σ resolution of 0.050 (0.054) on sin2 Θ23 and 0.040 (0.045) × 10-3 eV2 on Δm232 for 100% (50%) neutrino beam mode running assuming sin2 Θ23 = 0.5 and Δm232 = 2.4 × 10-3 eV2. T2K will have sensitivity to the CP-violating phase δCP at 90% C.L. or better over a significant range. For example, if sin2 2Θ23 is maximal (i.e. Θ23 = 45°) the range is -115° < δCP < -60° for normal hierarchy and +50° < δCP < +130° for inverted hierarchy. When T2K data is combined with data from the NOνA experiment, the region of oscillation parameter space where there is sensitivity to observe a non-zero δCP is substantially increased compared to if each experiment is analyzed alone.
Abe, K; Adam, J; Aihara, H; Akiri, T; Andreopoulos, C; Aoki, S; Ariga, A; Assylbekov, S; Autiero, D; Barbi, M; Barker, GJ; Barr, G; Bartet-Friburg, P; Bass, M; Batkiewicz, M; Bay, F; Berardi, V; Berger, BE; Berkman, S; Bhadra, S; Blaszczyk, FDM; Blondel, A; Bojechko, C; Bordoni, S; Boyd, SB; Brailsford, D; Bravar, A; Bronner, C; Buchanan, N; Calland, RG; Caravaca Rodríguez, J; Cartwright, SL; Castillo, R; Catanesi, MG; Cervera, A; Cherdack, D; Christodoulou, G; Clifton, A; Coleman, J; Coleman, SJ; Collazuol, G; Connolly, K; Cremonesi, L; Dabrowska, A; Danko, I; Das, R; Davis, S; De Perio, P; De Rosa, G; Dealtry, T; Dennis, SR; Densham, C; Dewhurst, D; Di Lodovico, F; Di Luise, S; Drapier, O; Duboyski, T; Duffy, K; Dumarchez, J; Dytman, S; Dziewiecki, M; Emery-Schrenk, S; Ereditato, A; Escudero, L; Feusels, T; Finch, AJ; Fiorentini, GA; Friend, M; Fujii, Y; Fukuda, Y; Furmanski, AP; Galymov, V; Garcia, A; Giffin, S; Giganti, C; Gilje, K; Goeldi, D; Golan, T; Gonin, M; Grant, N; Gudin, D; Hadley, DR; Haegel, L; Haesler, A; Haigh, MD; Hamilton, P; Hansen, D; Hara, T; Hartz, M; Hasegawa, T; Hastings, NC; Hayashino, T; Hayato, Y; Hearty, C; Helmer, RL; Hierholzer, M; Hignight, J; Hillairet, A; Himmel, A; Hiraki, T
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