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Abe, K, Abgrall, N, Aihara, H, Akiri, T, Albert, JB, Andreopoulos, C 
ORCID: 0000-0003-2020-8215, Aoki, S, Ariga, A, Ariga, T, Assylbekov, S et al (show 348 more authors) , Autiero, D, Barbi, M, Barker, GJ, Barr, G, Bass, M, Batkiewicz, M, Bay, F, Bentham, SW, Berardi, V, Berger, BE, Berkman, S, Bertram, I, Beznosko, D, Bhadra, S, Blaszczyk, FDM, Blondel, A, Bojechko, C, Boyd, S, Brailsford, D, Bravar, A, Bronner, C, Brook-Roberge, DG, Buchanan, N, Calland, RG, Rodriguez, J Caravaca, Cartwright, SL, Castillo, R, Catanesi, MG, Cervera, A, Cherdack, D, Christodoulou, G, Clifton, A, Coleman, J ORCID: 0000-0003-1319-0889, Coleman, SJ, Collazuol, G, Connolly, K, Cremonesi, L, Curioni, A, Dabrowska, A, Danko, I, Das, R, Davis, S, Day, M, de Andre, JPAM, de Perio, P, De Rosa, G, Dealtry, T, Dennis, S, Densham, C, Di Lodovico, F, Di Luise, S, Dobson, J, Drapier, O, Duboyski, T, Dufour, F, Dumarchez, J, Dytman, S, Dziewiecki, M, Dziomba, M, Emery, S, Ereditato, A, Escudero, L, Finch, AJ, Frank, E, Friend, M, Fujii, Y, Fukuda, Y, Furmanski, A, Galymov, V, Gaudin, A, Giffin, S, Giganti, C, Gilje, K, Golan, T, Gomez-Cadenas, JJ, Gonin, M, Grant, N, Gudin, D, Hadley, DR, Haesler, A, Haigh, MD, Hamilton, P, Hansen, D, Hara, T, Hartz, M, Hasegawa, T, Hastings, NC, Hayato, Y, Hearty, C, Helmer, RL, Hierholzer, M, Hignight, J, Hillairet, A, Himmel, A, Hiraki, T, Hirota, S, Holeczek, J, Horikawa, S, Huang, K, Ichikawa, AK, Ieki, K, Ieva, M, Ikeda, M, Imber, J, Insler, J, Irvine, TJ, Ishida, T, Ishii, T, Ives, SJ, Iyogi, K, Izmaylov, A, Jacob, A, Jamieson, B, Johnson, RA, Jo, JH, Jonsson, P, Joo, KK, Jung, CK, Kaboth, A, Kaji, H, Kajita, T, Kakuno, H, Kameda, J, Kanazawa, Y, Karlen, D, Karpikov, I, Kearns, E, Khabibullin, M, Khanam, F, Khotjantsev, A, Kielczewska, D, Kikawa, T, Kilinski, A, Kim, JY, Kim, J, Kim, SB, Kirby, B, Kisiel, J, Kitching, P, Kobayashi, T, Kogan, G, Kolaceke, A, Konaka, A, Kormos, LL, Korzenev, A, Koseki, K, Koshio, Y, Kowalik, K, Kreslo, I, Kropp, W, Kubo, H, Kudenko, Y, Kumaratunga, S, Kurjata, R, Kutter, T, Lagoda, J, Laihem, K, Laing, A, Laveder, M, Lawe, M, Lazos, M, Lee, KP, Licciardi, C, Lim, IT, Lindner, T, Lister, C, Litchfield, RP, Longhin, A, Lopez, GD, Ludovici, L, Macaire, M, Magaletti, L, Mahn, K, Malek, M, Manly, S, Marchionni, A, Marino, AD, Marteau, J, Martin, JF, Maruyama, T, Marzec, J, Masliah, P, Mathie, EL, Matveev, V, Mavrokoridis, K ORCID: 0000-0002-9244-4519, Mazzucato, E, McCauley, N ORCID: 0000-0002-5982-5125, McFarland, KS, McGrew, C, McLachlan, T, Messina, M, Metelko, C, Mezzetto, M, Mijakowski, P, Miller, CA, Minamino, A, Mineev, O, Mine, S, Missert, A, Miura, M, Monfregola, L, Moriyama, S, Mueller, Th A, Murakami, A, Murdoch, M, Murphy, S, Myslik, J, Nagasaki, T, Nakadaira, T, Nakahata, M, Nakai, T, Nakajima, K, Nakamura, K, Nakayama, S, Nakaya, T, Nakayoshi, K, Naples, D, Nicholls, TC, Nielsen, C, Nirkko, M, Nishikawa, K, Nishimura, Y, O'Keeffe, HM, Obayashi, Y, Ohta, R, Okumura, K, Okusawa, T, Oryszczak, W, Oser, SM, Otani, M, Owen, RA, Oyama, Y, Pac, MY, Palladino, V, Paolone, V, Payne, D ORCID: 0000-0002-8520-5210, Pearce, GF, Perevozchikov, O, Perkin, JD, Petrov, Y, Guerra, ES Pinzon, Plonski, P, Poplawska, E, Popov, B, Posiadala, M, Poutissou, J-M, Poutissou, R, Przewlocki, P, Quilain, B, Radicioni, E, Ratoff, PN, Ravonel, M, Rayner, MAM, Reeves, M, Reinherz-Aronis, E, Retiere, F, Robert, A, Rodrigues, PA, Rondio, E, Roth, S, Rubbia, A, Ruterbories, D, Sacco, R, Sakashita, K, Sanchez, F, Scantamburlo, E, Scholberg, K, Schwehr, J, Scott, M, Scully, DI, Seiya, Y, Sekiguchi, T, Sekiya, H, Sgalaberna, D, Shibata, M, Shiozawa, M, Short, S, Shustrov, Y, Sinclair, P, Smith, B, Smith, RJ, Smy, M, Sobczyk, JT, Sobel, H, Sorel, M, Southwell, L, Stamoulis, P, Steinmann, J, Still, B, Suzuki, A, Suzuki, K, Suzuki, SY, Suzuki, Y, Szeglowski, T, Szeptycka, M, Tacik, R, Tada, M, Takahashi, S, Takeda, A, Takeuchi, Y, Tanaka, HA, Tanaka, MM, Tanaka, M, Taylor, IJ, Terhorst, D, Terri, R, Thompson, LF, Thorley, A, Tobayama, S, Toki, W, Tomura, T, Totsuka, Y, Touramanis, C ORCID: 0000-0001-5191-2171, Tsukamoto, T, Tzanov, M, Uchida, Y, Ueno, K, Vacheret, A, Vagins, M, Vasseur, G, Wachala, T, Waldron, AV, Walter, CW, Wark, D, Wascko, MO, Weber, A, Wendell, R, Wilkes, RJ, Wilking, MJ, Wilkinson, C, Williamson, Z, Wilson, JR, Wilson, RJ, Wongjirad, T, Yamada, Y, Yamamoto, K, Yanagisawa, C, Yen, S, Yershov, N, Yokoyama, M, Yuan, T, Zalewska, A, Zambelli, L, Zaremba, K, Ziembicki, M, Zimmerman, ED, Zito, M and Zmuda, J
(2013)
Evidence of electron neutrino appearance in a muon neutrino beam
PHYSICAL REVIEW D, 88 (3).
032002-.
ISSN 2470-0010, 2470-0029
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Abstract
The T2K Collaboration reports evidence for electron neutrino appearance at the atmospheric mass splitting, |Δm322|≈2.4×10-3 eV2. An excess of electron neutrino interactions over background is observed from a muon neutrino beam with a peak energy of 0.6 GeV at the Super-Kamiokande (SK) detector 295 km from the beam's origin. Signal and background predictions are constrained by data from near detectors located 280 m from the neutrino production target. We observe 11 electron neutrino candidate events at the SK detector when a background of 3.3±0.4(syst) events is expected. The background-only hypothesis is rejected with a p value of 0.0009 (3.1σ), and a fit assuming ν<inf>μ</inf>→ν<inf>e</inf> oscillations with sinâ¡22θ<inf>23</inf>=1, δ<inf>CP</inf>=0 and |Δm322|=2.4×10-3 eV2 yields sinâ¡22θ<inf>13</inf>=0.088-0.039+0. 049(stat+syst). © 2013 American Physical Society.
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