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Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of $ν_e$ interactions at the far detector

Abe, K. and Amey, J. and Andreopoulos, C. and Antonova, M. and Aoki, S. and Ariga, A. and Ashida, Y. and Ban, S. and Barbi, M. and Barker, G. J. and Barr, G. and Barry, C. and Batkiewicz, M. and Berardi, V. and Berkman, S. and Bhadra, S. and Bienstock, S. and Blondel, A. and Bolognesi, S. and Bordoni, S. and Brailsford, D. and Bravar, A. and Bronner, C. and Avanzini, M. Buizza and Calland, R. G. and Campbell, T. and Cao, S. and Catanesi, M. G. and Cervera, A. and Chappell, A. and Checchia, C. and Cherdack, D. and Chikuma, N. and Christodoulou, G. and Coleman, J. and Collazuol, G. and Coplowe, D. and Cudd, A. and Dabrowska, A. and Rosa, G. De and Dealtry, T. and Denner, P. F. and Dennis, S. R. and Densham, C. and Lodovico, F. Di and Dolan, S. and Drapier, O. and Duffy, K. E. and Dumarchez, J. and Dunne, P. and Emery-Schrenk, S. and Ereditato, A. and Feusels, T. and Finch, A. J. and Fiorentini, G. A. and Friend, M. and Fujii, Y. and Fukuda, D. and Fukuda, Y. and Giganti, C. and Gizzarelli, F. and Golan, T. and Gonin, M. and Hadley, D. R. and Haegel, L. and Hansen, D. and Harada, J. and Hartz, M. and Hasegawa, T. and Hastings, N. C. and Hayashino, T. and Hayato, Y. and Hillairet, A. and Hiraki, T. and Hiramoto, A. and Hirota, S. and Hogan, M. and Holeczek, J. and Hosomi, F. and Huang, K. and Ichikawa, A. K. and Ikeda, M. and Imber, J. and Insler, J. and Intonti, R. A. and Ishida, T. and Ishii, T. and Iwai, E. and Iwamoto, K. and Izmaylov, A. and Jamieson, B. and Jiang, M. and Jonsson, P. and Kabirnezhad, M. and Kaboth, A. C. and Kajita, T. and Kakuno, H. and Kameda, J. and Karlen, D. and Katori, T. and Kearns, E. and Khabibullin, M. and Khotjantsev, A. and Kisiel, J. and Knight, A. and Knox, A. and Kobayashi, T. and Koch, L. and Koga, T. and Koller, P. P. and Konaka, A. and Kormos, L. L. and Koshio, Y. and Kowalik, K. and Kudenko, Y. and Kurjata, R. and Kutter, T. and Lagoda, J. and Lamont, I. and Lamoureux, M. and Lasorak, P. and Laveder, M. and Lawe, M. and Licciardi, M. and Lindner, T. and Liptak, Z. J. and Litchfield, R. P. and Longhin, A. and Lopez, J. P. and Lou, T. and Ludovici, L. and Lu, X. and Magaletti, L. and Mahn, K. and Malek, M. and Manly, S. and Maret, L. and Marino, A. D. and Martins, P. and Martynenko, S. and Maruyama, T. and Matveev, V. and Mavrokoridis, K. and Mazzucato, E. and McCarthy, M. and McCauley, N. and McFarland, K. S. and McGrew, C. and Mefodiev, A. and Metelko, C. and Mezzetto, M. and Minamino, A. and Mineev, O. and Mine, S. and Missert, A. and Miura, M. and Moriyama, S. and Morrison, J. and Mueller, Th A. and Nakadaira, T. and Nakahata, M. and Nakamura, K. G. and Nakamura, K. and Nakamura, K. D. and Nakanishi, Y. and Nakayama, S. and Nakaya, T. and Nakayoshi, K. and Nantais, C. and Nielsen, C. and Nishikawa, K. and Nishimura, Y. and Novella, P. and Nowak, J. and O'Keeffe, H. M. and Okusawa, T. and Oryszczak, W. and Oser, S. M. and Ovsyannikova, T. and Oyama, Y. and Palladino, V. and Palomino, J. L. and Paolone, V. and Patel, N. D. and Paudyal, P. and Pavin, M. and Payne, D. and Petrov, Y. and Guerra, E. S. Pinzon and Pistillo, C. and Popov, B. and Posiadala-Zezula, M. and Poutissou, J. -M. and Przewlocki, P. and Quilain, B. and Radermacher, T. and Radicioni, E. and Ratoff, P. N. and Rayner, M. A. and Reinherz-Aronis, E. and Riccio, C. and Rodrigues, P. A. and Rondio, E. and Rossi, B. and Roth, S. and Ruggeri, A. C. and Rychter, A. and Sakashita, K. and Sánchez, F. and Scantamburlo, E. and Scholberg, K. and Schwehr, J. and Seiya, Y. and Sekiguchi, T. and Sekiya, H. and Sgalaberna, D. and Shaikhiev, A. and Shaker, F. and Shaw, D. and Shiozawa, M. and Shirahige, T. and Smy, M. and Sobczyk, J. T. and Sobel, H. and Steinmann, J. and Stewart, T. and Stowell, P. and Suda, Y. and Suvorov, S. and Suzuki, A. and Suzuki, S. Y. and Suzuki, Y. and Tacik, R. and Tada, M. and Takeda, A. and Tamura, R. and Tanaka, H. K. and Tanaka, H. A. and Thakore, T. and Tobayama, S. and Toki, W. and Tomura, T. and Tsukamoto, T. and Tzanov, M. and Vagins, M. and Vallari, Z. and Vasseur, G. and Vilela, C. and Vladisavljevic, T. and Wachala, T. and Wark, D. and Wascko, M. O. and Weber, A. and Wendell, R. and Wilking, M. J. and Wret, C. and Yamamoto, K. and Yanagisawa, C. and Yano, T. and Yen, S. and Yershov, N. and Yokoyama, M. and Yu, M. and Zalewska, A. and Zalipska, J. and Zambelli, L. and Zaremba, K. and Ziembicki, M. and Zimmerman, E. D. and Zito, M. (2017) Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of $ν_e$ interactions at the far detector. Physical Review D. ISSN 1550-7998 (In Press)

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    Abstract

    The T2K experiment reports an updated analysis of neutrino and antineutrino oscillations in appearance and disappearance channels. A sample of electron neutrino candidates at Super-Kamiokande in which a pion decay has been tagged is added to the four single-ring samples used in previous T2K oscillation analyses. Through combined analyses of these five samples, simultaneous measurements of four oscillation parameters, $|\Delta m^2_{32}|$, $\sin^2(\theta_{23})$, $\sin^2(\theta_{13})$, and $\delta_{CP}$ and of the mass ordering are made. A set of studies of simulated data indicates that the sensitivity to the oscillation parameters is not limited by neutrino interaction model uncertainty. Multiple oscillation analyses are performed, and frequentist and Bayesian intervals are presented for combinations of the oscillation parameters with and without the inclusion of reactor constraints on $\sin^2(\theta_{13})$. When combined with reactor measurements, the hypothesis of CP conservation ($\delta_{CP}$$=0$ or $\pi$) is excluded at 90% confidence level. The 90% confidence region for $\delta_{CP}$ is [-2.95,-0.44] ([-1.47, -1.27]) for normal (inverted) ordering. The central values and 68\% confidence intervals for the other oscillation parameters for normal (inverted) ordering are $\Delta m^{2}_{32}=2.54\pm0.08$ ($2.51\pm0.08$) $\times 10^{-3}$ eV$^2 / c^4$ and $\sin^2(\theta_{23}) = 0.55^{+0.05}_{-0.09}$ ($0.55^{+0.05}_{-0.08}$), compatible with maximal mixing. In the Bayesian analysis, the data weakly prefer normal ordering (Bayes factor 3.7) and the upper octant for $\sin^2(\theta_{23})$ (Bayes factor 2.4).

    Item Type: Article
    Journal or Publication Title: Physical Review D
    Additional Information: 50 pages, 50 figures
    Uncontrolled Keywords: hep-ex
    Subjects:
    Departments: Faculty of Science and Technology > Physics
    Faculty of Health and Medicine
    ID Code: 87743
    Deposited By: ep_importer_pure
    Deposited On: 13 Sep 2017 14:00
    Refereed?: Yes
    Published?: In Press
    Last Modified: 21 Sep 2017 02:16
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/87743

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