Observation of Electron Neutrino Appearance in a Muon Neutrino Beam
Creators: name: Abe, K.
name: Adam, J.
name: Aihara, H.
name: Akiri, T.
name: Andreopoulos, C.
name: Aoki, S.
name: Ariga, A.
name: Ariga, T.
name: Assylbekov, S.
name: Autiero, D.
name: Barbi, M.
name: Barker, G. J.
name: Barr, G.
name: Bass, M.
name: Batkiewicz, M.
name: Bay, F.
name: Bentham, S. W.
name: Berardi, V.
name: Berger, B. E.
name: Berkman, S.
name: Bertram, I.
name: Bhadra, S.
name: Blaszczyk, F. d. M.
name: Blondel, A.
name: Bojechko, C.
name: Bordoni, S.
name: Boyd, S. B.
name: Brailsford, D.
name: Bravar, A.
name: Bronner, C.
name: Buchanan, N.
name: Calland, R. G.
name: Rodríguez, J. Caravaca
name: Cartwright, S. L.
name: Castillo, R.
name: Catanesi, M. G.
name: Cervera, A.
name: Cherdack, D.
name: Christodoulou, G.
name: Clifton, A.
name: Coleman, J.
name: Coleman, S. J.
name: Collazuol, G.
name: Connolly, K.
name: Cremonesi, L.
name: Dabrowska, A.
name: Danko, I.
name: Das, R.
name: Davis, S.
name: de Perio, P.
name: De Rosa, G.
name: Dealtry, T.
name: Dennis, S. R.
name: Densham, C.
name: Di Lodovico, F.
name: Di Luise, S.
name: Drapier, O.
name: Duboyski, T.
name: Duffy, K.
name: Dufour, F.
name: Dumarchez, J.
name: Dytman, S.
name: Dziewiecki, M.
name: Emery, S.
name: Ereditato, A.
name: Escudero, L.
name: Finch, A. J.
name: Floetotto, L.
name: Friend, M.
name: Fujii, Y.
name: Fukuda, Y.
name: Furmanski, A. P.
name: Galymov, V.
name: Gaudin, A.
name: Giffin, S.
name: Giganti, C.
name: Gilje, K.
name: Goeldi, D.
name: Golan, T.
name: Gomez-Cadenas, J. J.
name: Gonin, M.
name: Grant, N.
name: Gudin, D.
name: Hadley, D. R.
name: Haesler, A.
name: Haigh, M. D.
name: Hamilton, P.
name: Hansen, D.
name: Hara, T.
name: Hartz, M.
name: Hasegawa, T.
name: Hastings, N. C.
name: Hayato, Y.
name: Hearty, C.
name: Helmer, R. L.
name: Hierholzer, M.
name: Hignight, J.
name: Hillairet, A.
name: Himmel, A.
name: Hiraki, T.
name: Hirota, S.
name: Holeczek, J.
name: Horikawa, S.
name: Huang, K.
name: Ichikawa, A. K.
name: Ieki, K.
name: Ieva, M.
name: Ikeda, M.
name: Imber, J.
name: Insler, J.
name: Irvine, T. J.
name: Ishida, T.
name: Ishii, T.
name: Ives, S. J.
name: Iyogi, K.
name: Izmaylov, A.
name: Jacob, A.
name: Jamieson, B.
name: Johnson, R. A.
name: Jo, J. H.
name: Jonsson, P.
name: Jung, C. K.
name: Kaboth, A. C.
name: Kajita, T.
name: Kakuno, H.
name: Kameda, J.
name: Kanazawa, Y.
name: Karlen, D.
name: Karpikov, I.
name: Kearns, E.
name: Khabibullin, M.
name: Khotjantsev, A.
name: Kielczewska, D.
name: Kikawa, T.
name: Kilinski, A.
name: Kim, J.
name: Kisiel, J.
name: Kitching, P.
name: Kobayashi, T.
name: Koch, L.
name: Kolaceke, A.
name: Konaka, A.
name: Kormos, L. L.
name: Korzenev, A.
name: Koseki, K.
name: Koshio, Y.
name: Kreslo, I.
name: Kropp, W.
name: Kubo, H.
name: Kudenko, Y.
name: Kumaratunga, S.
name: Kurjata, R.
name: Kutter, T.
name: Lagoda, J.
name: Laihem, K.
name: Lamont, I.
name: Laveder, M.
name: Lawe, M.
name: Lazos, M.
name: Lee, K. P.
name: Licciardi, C.
name: Lindner, T.
name: Lister, C.
name: Litchfield, R. P.
name: Longhin, A.
name: Ludovici, L.
name: Macaire, M.
name: Magaletti, L.
name: Mahn, K.
name: Malek, M.
name: Manly, S.
name: Marino, A. D.
name: Marteau, J.
name: Martin, J. F.
name: Maruyama, T.
name: Marzec, J.
name: Mathie, E. L.
name: Matveev, V.
name: Mavrokoridis, K.
name: Mazzucato, E.
name: McCarthy, M.
name: McCauley, N.
name: McFarland, K. S.
name: McGrew, C.
name: Metelko, C.
name: Mezzetto, M.
name: Mijakowski, P.
name: Miller, C. A.
name: Minamino, A.
name: Mineev, O.
name: Mine, S.
name: Missert, A.
name: Miura, M.
name: Monfregola, L.
name: Moriyama, S.
name: Mueller, Th. A.
name: Murakami, A.
name: Murdoch, M.
name: Murphy, S.
name: Myslik, J.
name: Nagasaki, T.
name: Nakadaira, T.
name: Nakahata, M.
name: Nakai, T.
name: Nakamura, K.
name: Nakayama, S.
name: Nakaya, T.
name: Nakayoshi, K.
name: Naples, D.
name: Nielsen, C.
name: Nirkko, M.
name: Nishikawa, K.
name: Nishimura, Y.
name: O'Keeffe, H. M.
name: Ohta, R.
name: Okumura, K.
name: Okusawa, T.
name: Oryszczak, W.
name: Oser, S. M.
name: Owen, R. A.
name: Oyama, Y.
name: Palladino, V.
name: Paolone, V.
name: Payne, D.
name: Pearce, G. F.
name: Perevozchikov, O.
name: Perkin, J. D.
name: Petrov, Y.
name: Pickard, L. J.
name: Guerra, E. S. Pinzon
name: Pistillo, C.
name: Plonski, P.
name: Poplawska, E.
name: Popov, B.
name: Posiadala, M.
name: Poutissou, J. -M.
name: Poutissou, R.
name: Przewlocki, P.
name: Quilain, B.
name: Radicioni, E.
name: Ratoff, P. N.
name: Ravonel, M.
name: Rayner, M. A. M.
name: Redij, A.
name: Reeves, M.
name: Reinherz-Aronis, E.
name: Retiere, F.
name: Robert, A.
name: Rodrigues, P. A.
name: Rojas, P.
name: Rondio, E.
name: Roth, S.
name: Rubbia, A.
name: Ruterbories, D.
name: Sacco, R.
name: Sakashita, K.
name: Sánchez, F.
name: Sato, F.
name: Scantamburlo, E.
name: Scholberg, K.
name: Schwehr, J.
name: Scott, M.
name: Seiya, Y.
name: Sekiguchi, T.
name: Sekiya, H.
name: Sgalaberna, D.
name: Shiozawa, M.
name: Short, S.
name: Shustrov, Y.
name: Sinclair, P.
name: Smith, B.
name: Smith, R. J.
name: Smy, M.
name: Sobczyk, J. T.
name: Sobel, H.
name: Sorel, M.
name: Southwell, L.
name: Stamoulis, P.
name: Steinmann, J.
name: Still, B.
name: Suda, Y.
name: Suzuki, A.
name: Suzuki, K.
name: Suzuki, S. Y.
name: Suzuki, Y.
name: Szeglowski, T.
name: Tacik, R.
name: Tada, M.
name: Takahashi, S.
name: Takeda, A.
name: Takeuchi, Y.
name: Tanaka, H. K.
name: Tanaka, H. A.
name: Tanaka, M. M.
name: Terhorst, D.
name: Terri, R.
name: Thompson, L. F.
name: Thorley, A.
name: Tobayama, S.
name: Toki, W.
name: Tomura, T.
name: Totsuka, Y.
name: Touramanis, C.
name: Tsukamoto, T.
name: Tzanov, M.
name: Uchida, Y.
name: Ueno, K.
name: Vacheret, A.
name: Vagins, M.
name: Vasseur, G.
name: Wachala, T.
name: Waldron, A. V.
name: Walter, C. W.
name: Wark, D.
name: Wascko, M. O.
name: Weber, A.
name: Wendell, R.
name: Wilkes, R. J.
name: Wilking, M. J.
name: Wilkinson, C.
name: Williamson, Z.
name: Wilson, J. R.
name: Wilson, R. J.
name: Wongjirad, T.
name: Yamada, Y.
name: Yamamoto, K.
name: Yanagisawa, C.
name: Yen, S.
name: Yershov, N.
name: Yokoyama, M.
name: Yuan, T.
name: Zalewska, A.
name: Zalipska, J.
name: Zambelli, L.
name: Zaremba, K.
name: Ziembicki, M.
name: Zimmerman, E. D.
name: Zito, M.
name: Żmuda, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The T2K experiment has observed electron neutrino appearance in a muon neutrino beam produced 295 km from the Super-Kamiokande detector with a peak energy of 0.6 GeV. A total of 28 electron neutrino events were detected with an energy distribution consistent with an appearance signal, corresponding to a significance of 7.3$σ$ when compared to 4.92 $\pm$ 0.55 expected background events. In the PMNS mixing model, the electron neutrino appearance signal depends on several parameters including three mixing angles $θ_{12}$, $θ_{23}$, $θ_{13}$, a mass difference $Δm^2_{32}$ and a CP violating phase $δ_{\mathrm{CP}}$. In this neutrino oscillation scenario, assuming $|Δm^2_{32}| = 2.4 \times 10^{-3}$ $\rm eV^2$, $\sin^2 θ_{23} = 0.5$, and $Δm^2_{32} &gt;0$ ($Δm^2_{32} &lt;0$), a best-fit value of $\sin^2 2 θ_{13}$ = $0.140^{+0.038}_{-0.032}$ ($0.170^{+0.045}_{-0.037}$) is obtained at $δ_{\mathrm{CP}}=0$. When combining the result with the current best knowledge of oscillation parameters including the world average value of $θ_{13}$ from reactor experiments, some values of $δ_{\mathrm{CP}}$ are disfavored at the 90% CL.
description: 8 pages, 6 figures