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1. Indication of electron neutrino appearance from an accelerator-produced off-axis muon neutrino beam

Author

S. Roth, J. Lagoda, M. Iwasaki, Paul Fraser Harrison, T. Okusawa, Jungsang Kim, S. Y. Suzuki, M. Ikeda, M. Bass, F. Pierre, R. A. Wendell, C. Bojechko, C. W. Walter, B. A. Popov, Vincenzo Berardi, P. T. Le, P. Mijakowski, C. Licciardi, Tomoko Ariga, J. Ilic, M. Ravonel, T. Maruyama, E. L. Mathie, V. Galymov, T. Ishii, M. A. George, I. Taylor, G. Vasseur, T. Nakadaira, Kazuhiro Suzuki, M. Ieva, Hirokatsu Ohhata, Y. Fukuda, D. Autiero, P. Paul, Kate Scholberg, M. M. Khabibullin, A. Yamamoto, Toru Ogitsu, F. Khanam, G.D. Barr, T. Maryon, Michel Raymond, P. Kitching, R. Tacik, M. Hartz, G. Christodoulou, S. B. Boyd, J. R. Wilson, K. K. Joo, T. Wachala, E. Frank, M. O. Wascko, C. A. Chavez, Marco Laveder, A. Ferrero, B. Hartfiel, A. C. Weber, E. Kearns, K. P. Lee, Justin Albert, N. Abgrall, M. Szeptycka, M. M. Tanaka, Leigh H. Whitehead, J. P.A.M. De André, E. Mazzucato, Sy Suzuki, Y. Obayashi, K. Mavrokoridis, G. F. Pearce, J. J. Walding, A. Suzuki, J. Myslik, N. Grant, André Rubbia, M. Murdoch, S. W. K. Emery, Masayuki Nakahata, P. de Perio, G. Collazuol, Mark Scott, Yusuke Koshio, Masashi Tanaka, S. Yen, T. Ishida, Yoshikazu Yamada, F. d. M. Blaszczyk, T. Yano, T. Golan, Biagio Rossi, Hiroyuki Sekiya, Y. Uchida, C. Hansen, C. A. Miller, A. Minamino, M. Day, V. Paolone, P. Sutcliffe, Masashi Yokoyama, E. Poplawska, R. Poutissou, Hs Budd, P. Masliah, T. Szeglowski, Soo-Bong Kim, A. Longhin, Michael Litos, J. Marteau, O. Drapier, K. Iyogi, F. Moreau, E. D. Zimmerman, M. Iida, B. Morgan, M. A. Ward, Tomiyoshi Haruyama, J. M. Levy, L. L. Kormos, T. Kikawa, C. Touramanis, Kendall Mahn, Robert Henderson, A. Hatzikoutelis, H. Kaji, R. A. Johnson, Antonio Ereditato, H. Nishino, M. Zito, N. Yershov, A. Cazes, K. Zaremba, B. Kirby, I. Kreslo, J. Dumarchez, Kevin Scott McFarland, A. Cervera, Henry W. Sobel, V. Palladino, Tsuyoshi Nakaya, Takashi Kobayashi, M. Malek, J. Y. Kim, J. Kisiel, T. M. Raufer, T. Hasegawa, S. Mine, Y. Takeuchi, A. Delbart, J. D. Perkin, Scott Davis, D. Hansen, R. Sulej, Atsushi Takeda, Takaaki Kajita, G. D. Lopez, Oleg Mineev, K. Hamano, R. Castillo, Yuichi Oyama, T. Tsukamoto, S. J. Ives, R. P. Litchfield, Takayuki Tomaru, Masato Shiozawa, M. Ziembicki, S. Sabouri, Ken Sakashita, Norio Higashi, J. Zalipska, Minoru Otani, David Calvet, C. Strabel, S. Assylbekov, M. Siyad, V. Pettinacci, K. Gilje, A. Zalewska, Federico Sanchez, M. Fechner, A. Haesler, Fred Gannaway, Alexander Finch, D. Ruterbories, G. Wikström, S. Bhadra, Akitaka Ariga, Antonin Vacheret, W. R. Kropp, K. Kowalik, J. Marzec, C. Matsumura, D. Payne, T. Hara, J. F. Martin, M. Tzanov, C. J. Metelko, Koji Nakamura, M. Barbi, Hiroaki Aihara, G. Jover-Manas, A. Carver, Shigeki Aoki, P. N. Ratoff, T. Kutter, S. Giffin, A. N. Khotjantsev, Y. Fujii, W. Coleman, A. Gendotti, A. Missert, F. Bay, M. Miura, T. Ozaki, A. Muir, Kodai Matsuoka, P. Guzowski, A. Bravar, Frédéric Dufour, C. Yanagisawa, K. Nishikawa, G. P. Ward, I. T. Lim, R. Terri, J. Holeczek, P. Wanderer, J. J. Gomez-Cadenas, Michal Dziewiecki, Kazuhiro Yamamoto, Jan T. Sobczyk, K. Laihem, N. Kimura, H. Kubo, K. Nakajima, M. Tada, P. Gumplinger, R. L. Helmer, Gareth J. Barker, Kimihiro Okumura, K. Koseki, Y. Shimizu, Dmitriy Beznosko, D. G. Brook-Roberge, S. M. Oser, J. P. Coleman, Y. Seiya, J. Schwehr, Yasuo Ajima, T. McLachlan, S. Horikawa, A. Blondel, M. Goldhaber, S. Yamada, K. Ieki, D. Karlen, R. J. Wilkes, D. I. Scully, N. J. Buchanan, P. A. Rodrigues, E. Radicioni, M. L. Navin, H.A. Tanaka, Yoshinari Hayato, C. K. Jung, D. L. Wark, M. Y. Pac, Achim Stahl, J. L. Stone, D. Kielczewska, A. Dabrowska, A. D. Marino, J. M. Poutissou, C. Bronner, N. West, I. Kato, K. Kaneyuki, T. C. Nicholls, Gavin Davies, U. Dore, P. Stamoulis, A. Thorley, A. Korzenev, L. Ludovici, M. Sorel, A. Gaudin, W. Qian, T. Lindner, C. Densham, G. Kogan, G. De Rosa, S. Hastings, R. A. Owen, M. D. Haigh, A. Badertscher, M. Macaire, Y. Takenaga, M. J. Wilking, Rhiju Das, S. Dytman, B. Jamieson, J. L. Raaf, J. Bouchez, Thorsten Lux, O. Araoka, M. Gonin, L. Escudero, Kenichi Tanaka, J. Steinmann, K. Abe, R. Sacco, S. L. Cartwright, A. Terashima, C. McGrew, K. Connolly, C. Andreopoulos, D. Terhorst, T. Nakai, Jing Wang, E. Rondio, P. Dinh Tran, N. McCauley, K. Mizouchi, Viktor Matveev, M. Noy, N. Tanimoto, Iain Alexander Bertram, J. Imber, S. Moriyama, M. B. Smy, M. Shibata, A. Hyndman, J. Kameda, P. Przewlocki, P. F. Loverre, J. M. Roney, Lester D.R. Thompson, Y. Kouzuma, L. R. Sulak, M. Mezzetto, R.P. Kurjata, S. W. Bentham, I. Z. Danko, K. Sasaki, K. Tashiro, Koh Ueno, Katsuyu Kasami, Yasuhiro Makida, N. Kulkarni, C. Hearty, T. Sekiguchi, Tatsushi Nakamoto, Alastair Grant, Richard J.H. Smith, G. Mituka, A. Murakami, Yutaka Yamanoi, Hiroshi Yamaoka, A. Marchionni, S. Di Luise, F. Di Lodovico, A. Curioni, K. Hayashi, Barry L. Nelson, Yu. G. Kudenko, L. Monfregola, S. Koike, S. Manly, M. Vagins, B. Andrieu, C. Giganti, B. Still, J. A. Nowak, C. Ishihara, M. Dziomba, Eiichi Hirose, M. Posiadala, M. G. Catanesi, V. Kravtsov, S. Murphy, F. Retiere, Y. Totsuka, Susumu Takahashi, W. Metcalf, T. Wongjirad, S. Nakayama, A. Sarrat, S. Short, N. C. Hastings, D. Naples, A. Robert, A. Izmaylov, Steve K. Choi, J. Zmuda, M. Messina, A. V. Waldron, M. Besnier, J. Dobson, Joshua Hignight, Yoshihiro Suzuki, Robert Wilson, Takahiro Okamura, J. Argyriades, J. Beucher, A. Konaka, W. H. Toki, B. E. Berger, H. Kakuno, L. Zambelli, A. K. Ichikawa, Luigi Salvatore Esposito, Escudero Sanchez, Lorena [0000-0003-3464-9206], Whitehead, Leigh [0000-0002-3327-2534], Apollo - University of Cambridge Repository, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Département d'Electronique, des Détecteurs et d'Informatique (ex SEDI) (DEDI), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, T2K, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Département d'Electronique, des Détecteurs et d'Informatique pour la Physique (ex SEDI) (DEDIP), Abgrall, Nicolas, Argyriades, Jeremy, Blondel, Alain, Bravar, Alessandro, Dufour, Fanny, Ferrero, Andréa, Haesler, Alexis, Korzenev, Alexander, Murphy, Sébastien, Ravonel Salzgeber, Melody, Wikstrom, Gustav, K., Abe, N., Abgrall, Y., Ajima, H., Aihara, J., Albert, C., Andreopoulo, B., Andrieu, S., Aoki, O., Araoka, J., Argyriade, A., Ariga, T., Ariga, S., Assylbekov, D., Autiero, A., Badertscher, M., Barbi, G., Barker, G., Barr, M., Ba, F., Bay, S., Bentham, V., Berardi, B., Berger, I., Bertram, M., Besnier, J., Beucher, D., Beznosko, S., Bhadra, F., Blaszczyk, A., Blondel, C., Bojechko, J., Bouchez, S., Boyd, A., Bravar, C., Bronner, D., Brook Roberge, N., Buchanan, H., Budd, D., Calvet, S., Cartwright, A., Carver, R., Castillo, M., Catanesi, A., Caze, A., Cervera, C., Chavez, S., Choi, G., Christodoulou, J., Coleman, W., Coleman, G., Collazuol, K., Connolly, A., Curioni, A., Dabrowska, I., Danko, R., Da, G., Davie, S., Davi, M., Day, DE ROSA, Gianfranca, J., de André, P., de Perio, A., Delbart, C., Densham, F., Di Lodovico, S., Di Luise, P., Dinh Tran, J., Dobson, U., Dore, O., Drapier, F., Dufour, J., Dumarchez, S., Dytman, M., Dziewiecki, M., Dziomba, S., Emery, A., Ereditato, L., Escudero, L., Esposito, M., Fechner, A., Ferrero, A., Finch, E., Frank, Y., Fujii, Y., Fukuda, V., Galymov, F., Gannaway, A., Gaudin, A., Gendotti, M., George, S., Giffin, C., Giganti, K., Gilje, T., Golan, M., Goldhaber, J., Gomez Cadena, M., Gonin, N., Grant, A., Grant, P., Gumplinger, P., Guzowski, A., Haesler, M., Haigh, K., Hamano, C., Hansen, D., Hansen, T., Hara, P., Harrison, B., Hartfiel, M., Hartz, T., Haruyama, T., Hasegawa, N., Hasting, S., Hasting, A., Hatzikouteli, K., Hayashi, Y., Hayato, C., Hearty, R., Helmer, R., Henderson, N., Higashi, J., Hignight, E., Hirose, J., Holeczek, S., Horikawa, A., Hyndman, A., Ichikawa, K., Ieki, M., Ieva, M., Iida, M., Ikeda, J., Ilic, J., Imber, T., Ishida, C., Ishihara, T., Ishii, S., Ive, M., Iwasaki, K., Iyogi, A., Izmaylov, B., Jamieson, R., Johnson, K., Joo, G., Jover Mana, C., Jung, H., Kaji, T., Kajita, H., Kakuno, J., Kameda, K., Kaneyuki, D., Karlen, K., Kasami, I., Kato, E., Kearn, M., Khabibullin, F., Khanam, A., Khotjantsev, D., Kielczewska, T., Kikawa, J., Kim, S., Kim, N., Kimura, B., Kirby, J., Kisiel, P., Kitching, T., Kobayashi, G., Kogan, S., Koike, A., Konaka, L., Kormo, A., Korzenev, K., Koseki, Y., Koshio, Y., Kouzuma, K., Kowalik, V., Kravtsov, I., Kreslo, W., Kropp, H., Kubo, Y., Kudenko, N., Kulkarni, R., Kurjata, T., Kutter, J., Lagoda, K., Laihem, M., Laveder, K., Lee, P., Le, J., Levy, C., Licciardi, I., Lim, T., Lindner, R., Litchfield, M., Lito, A., Longhin, G., Lopez, P., Loverre, L., Ludovici, T., Lux, M., Macaire, K., Mahn, Y., Makida, M., Malek, S., Manly, A., Marchionni, A., Marino, J., Marteau, J., Martin, T., Maruyama, T., Maryon, J., Marzec, P., Masliah, E., Mathie, C., Matsumura, K., Matsuoka, V., Matveev, K., Mavrokoridi, E., Mazzucato, N., Mccauley, K., Mcfarland, C., Mcgrew, T., Mclachlan, M., Messina, W., Metcalf, C., Metelko, M., Mezzetto, P., Mijakowski, C., Miller, A., Minamino, O., Mineev, S., Mine, A., Missert, G., Mituka, M., Miura, K., Mizouchi, L., Monfregola, F., Moreau, B., Morgan, S., Moriyama, A., Muir, A., Murakami, M., Murdoch, S., Murphy, J., Myslik, T., Nakadaira, M., Nakahata, T., Nakai, K., Nakajima, T., Nakamoto, K., Nakamura, S., Nakayama, T., Nakaya, D., Naple, M., Navin, B., Nelson, T., Nicholl, K., Nishikawa, H., Nishino, J., Nowak, M., Noy, Y., Obayashi, T., Ogitsu, H., Ohhata, T., Okamura, K., Okumura, T., Okusawa, S., Oser, M., Otani, R., Owen, Y., Oyama, T., Ozaki, M., Pac, Palladino, Vittorio, V., Paolone, P., Paul, D., Payne, G., Pearce, J., Perkin, V., Pettinacci, F., Pierre, E., Poplawska, B., Popov, M., Posiadala, J. M., Poutissou, R., Poutissou, P., Przewlocki, W., Qian, J., Raaf, E., Radicioni, P., Ratoff, T., Raufer, M., Ravonel, M., Raymond, F., Retiere, A., Robert, P., Rodrigue, E., Rondio, J., Roney, B., Rossi, S., Roth, A., Rubbia, D., Ruterborie, S., Sabouri, R., Sacco, K., Sakashita, F., Sánchez, A., Sarrat, K., Sasaki, K., Scholberg, J., Schwehr, M., Scott, D., Scully, Y., Seiya, T., Sekiguchi, H., Sekiya, M., Shibata, Y., Shimizu, M., Shiozawa, S., Short, M., Siyad, R., Smith, M., Smy, J., Sobczyk, H., Sobel, M., Sorel, A., Stahl, P., Stamouli, J., Steinmann, B., Still, J., Stone, C., Strabel, L., Sulak, R., Sulej, P., Sutcliffe, A., Suzuki, K., Suzuki, S., Suzuki, Y., Suzuki, T., Szeglowski, M., Szeptycka, R., Tacik, M., Tada, S., Takahashi, A., Takeda, Y., Takenaga, Y., Takeuchi, K., Tanaka, H., Tanaka, M., Tanaka, N., Tanimoto, K., Tashiro, I., Taylor, A., Terashima, D., Terhorst, R., Terri, L., Thompson, A., Thorley, W., Toki, T., Tomaru, Y., Totsuka, C., Touramani, T., Tsukamoto, M., Tzanov, Y., Uchida, K., Ueno, A., Vacheret, M., Vagin, G., Vasseur, T., Wachala, J., Walding, A., Waldron, C., Walter, P., Wanderer, J., Wang, M., Ward, G., Ward, D., Wark, M., Wascko, A., Weber, R., Wendell, N., West, L., Whitehead, G., Wikström, R., Wilke, M., Wilking, J., Wilson, R., Wilson, T., Wongjirad, S., Yamada, Y., Yamada, A., Yamamoto, K., Yamamoto, Y., Yamanoi, H., Yamaoka, C., Yanagisawa, T., Yano, S., Yen, N., Yershov, M., Yokoyama, A., Zalewska, J., Zalipska, L., Zambelli, K., Zaremba, M., Ziembicki, E., Zimmerman, M., Zito, J., ??muda, and Walter, Christopher W

Subjects
Particle physics, FOS: Physical sciences, General Physics and Astronomy, ddc:500.2, CHOOZ, 01 natural sciences, Particle identification, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), neutrino, 14.60.Pq, 13.15.+g, 25.30.Pt, 95.55.Vj, 0103 physical sciences, neutrino oscillation, Muon neutrino, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Neutrino oscillation, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), ComputingMilieux_MISCELLANEOUS, Physics, NOνA, Tribimaximal mixing, hep-ex, 010308 nuclear & particles physics, T2K experiment, Física, T2K Collaboration, particle identification, Electron neutrino, experimental results
Abstract

The T2K experiment observes indications of $\nu_\mu\rightarrow \nu_e$ appearance in data accumulated with $1.43\times10^{20}$ protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with $|\Delta m_{23}^2|=2.4\times10^{-3}$ eV$^2$, $\sin^2 2\theta_{23}=1$ and $\sin^2 2\theta_{13}=0$, the expected number of such events is 1.5$\pm$0.3(syst.). Under this hypothesis, the probability to observe six or more candidate events is 7$\times10^{-3}$, equivalent to 2.5$\sigma$ significance. At 90% C.L., the data are consistent with 0.03(0.04)$, Comment: 20 pages, 6 figures, version published in PRL

Published
2011
Full Text
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2. Discovery of t Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment

Author

A. Longhin, A. M. Anokhina, R. Brugnera, Toshiyuki Nakano, G. De Lellis, G. Sirri, Ante Ljubičić, Artem Chukanov, A. Sheshukov, M. M. Chernyavsky, Masahiro Komatsu, A. Schembri, S. Ogawa, S. Tufanli, Y. Nakatsuka, T. Matsuo, M. Tenti, F. Pupilli, A. Buonaura, Kunihiro Morishima, P. Monacelli, M. Spinetti, G. Shoziyoev, Tomoko Ariga, M. De Serio, F. Laudisio, G. Galati, Naotaka Naganawa, A. B. Aleksandrov, A. Di Crescenzo, H. Shibuya, A. Garfagnini, A. M. Guler, B. Klicek, M. Roda, Alessandra Pastore, P. F. Loverre, Alessandro Paoloni, M. Kamiscioglu, C. Jollet, S. Simone, F. Mizutani, C. S. Yoon, Björn Wonsak, H. Hayakawa, A. S. Malgin, B. Büttner, I. Kreslo, N. G. Polukhina, I. Shakirianova, D. Duchesneau, Caren Hagner, Motoaki Miyanishi, Maria Cristina Montesi, C. Pistillo, I. G. Park, L. Consiglio, F. Terranova, Utku Kose, O. G. Ryazhskaya, M. T. Muciaccia, T. M. Roganova, Koichi Kodama, R. A. Fini, Seok Kim, N. Di Marco, N. Mauri, T. Shiraishi, M. Pozzato, W. Schmidt-Parzefall, F. Fornari, P. Strolin, T. Fukuda, I. Bodnarchuk, M. Malenica, Mario Stipčević, Katsumi Ishiguro, P. del Amo Sanchez, L. Pasqualini, D. Di Ferdinando, Takashi Matsushita, Kimio Niwa, L. Patrizii, B. Hosseini, G. Mandrioli, C. Kamiscioglu, Maximiliano Sioli, T. Shchedrina, D. A. Podgrudkov, S. Mikado, A. Olchevsky, E. Medinaceli, B. D. Park, S. Dusini, S. Zemskova, Akitaka Ariga, S. Dmitrievski, Satoru Takahashi, L. Votano, A. Hollnagel, N. Agafonova, M. Dracos, Shigeki Aoki, Hiroki Rokujo, G. Grella, Nobuko Kitagawa, J. L. Vuilleumier, V. Matveev, Simona Maria Stellacci, K. Ozaki, Anselmo Meregaglia, S. Buontempo, J. Ebert, Y. A. Gornushkin, L. Stanco, Pierre Vilain, Chiara Sirignano, J. H. Kim, Nicola D'Ambrosio, H. Pessard, Mykhailo Vladymyrov, Tatsuhiro Naka, A. Sotnikov, Gaston Wilquet, Antonio Ereditato, G. Rosa, Timur Dzhatdoev, D. Bender, Krešimir Jakovčić, T. Omura, L. Paparella, Cristiano Bozza, J. Goldberg, Osamu Sato, Adele Lauria, T. Hara, C. Gustavino, N. I. Starkov, V. Tioukov, A. Bertolin, Mitsuhiro Nakamura, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), OPERA, N., Agafonova, Aleksandrov, A., A., Anokhina, S., Aoki, A., Ariga, T., Ariga, D., Bender, A., Bertolin, I., Bodnarchuk, C., Bozza, R., Brugnera, Buonaura, Annarita, S., Buontempo, B., Büttner, M., Chernyavsky, A., Chukanov, L., Consiglio, N., D’Ambrosio, DE LELLIS, Giovanni, M., De Serio, P., Del Amo Sanchez, DI CRESCENZO, Antonia, D., Di Ferdinando, N., Di Marco, S., Dmitrievski, M., Draco, D., Duchesneau, S., Dusini, T., Dzhatdoev, J., Ebert, A., Ereditato, Fini, R. . A., F., Fornari, T., Fukuda, Galati, Giuliana, A., Garfagnini, J., Goldberg, Y., Gornushkin, G., Grella, Guler, A. . M., C., Gustavino, C., Hagner, T., Hara, H., Hayakawa, A., Hollnagel, B., Hosseini, K., Ishiguro, K., Jakovcic, C., Jollet, C., Kamiscioglu, M., Kamiscioglu, Kim, J. . H., Kim, S. . H., N., Kitagawa, B., Klicek, K., Kodama, M., Komatsu, U., Kose, I., Kreslo, F., Laudisio, Lauria, Adele, A., Ljubicic, A., Longhin, Loverre, P. . F., A., Malgin, M., Malenica, G., Mandrioli, T., Matsuo, T., Matsushita, V., Matveev, N., Mauri, E., Medinaceli, A., Meregaglia, S., Mikado, M., Miyanishi, F., Mizutani, P., Monacelli, Montesi, MARIA CRISTINA, K., Morishima, Muciaccia, M. . T., N., Naganawa, T., Naka, M., Nakamura, T., Nakano, Y., Nakatsuka, K., Niwa, S., Ogawa, A., Olchevsky, T., Omura, K., Ozaki, A., Paoloni, L., Paparella, Park, B. . D., Park, I. . G., L., Pasqualini, A., Pastore, L., Patrizii, H., Pessard, C., Pistillo, D., Podgrudkov, N., Polukhina, M., Pozzato, F., Pupilli, M., Roda, T., Roganova, H., Rokujo, G., Rosa, O., Ryazhskaya, O., Sato, A., Schembri, W., Schmidt Parzefall, I., Shakirianova, T., Shchedrina, A., Sheshukov, H., Shibuya, T., Shiraishi, G., Shoziyoev, S., Simone, M., Sioli, C., Sirignano, G., Sirri, A., Sotnikov, M., Spinetti, L., Stanco, N., Starkov, Stellacci, S. . M., M., Stipcevic, P., Strolin, S., Takahashi, M., Tenti, F., Terranova, V., Tioukov, S., Tufanli, P., Vilain, M., Vladymyrov, L., Votano, Vuilleumier, J. . L., G., Wilquet, B., Wonsak, Yoon, C. . S., S., Zemskova, Agafonova, N, Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bender, D., Bertolin, A., Bodnarchuk, I., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Büttner, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Del Amo Sanchez, P., Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R.A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Goldberg, J., Gornushkin, Y., Grella, G., Guler, A.M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, H., Hollnagel, A., Hosseini, B., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, J.H., Kim, S.H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Ljubicic, A., Longhin, A., Loverre, P.F., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matsushita, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M.C., Morishima, K., Muciaccia, M.T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Olchevsky, A., Omura, T., Ozaki, K., Paoloni, A., Paparella, L., Park, B.D., Park, I.G., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Schmidt-Parzefall, W., Shakirianova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S.M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vilain, P., Vladymyrov, M., Votano, L., Vuilleumier, J.L., Wilquet, G., Wonsak, B., Yoon, C.S., Zemskova, S., Aleksandrov, A, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Bender, D, Bertolin, A, Bodnarchuk, I, Bozza, C, Brugnera, R, Buonaura, A, Buontempo, S, Büttner, B, Chernyavsky, M, Chukanov, A, Consiglio, L, D'Ambrosio, N, De Lellis, G, De Serio, M, Del Amo Sanchez, P, Di Crescenzo, A, Di Ferdinando, D, Di Marco, N, Dmitrievski, S, Dracos, M, Duchesneau, D, Dusini, S, Dzhatdoev, T, Ebert, J, Ereditato, A, Fini, R, Fornari, F, Fukuda, T, Galati, G, Garfagnini, A, Goldberg, J, Gornushkin, Y, Grella, G, Guler, A, Gustavino, C, Hagner, C, Hara, T, Hayakawa, H, Hollnagel, A, Hosseini, B, Ishiguro, K, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Kim, J, Kim, S, Kitagawa, N, Klicek, B, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Laudisio, F, Lauria, A, Ljubicic, A, Longhin, A, Loverre, P, Malgin, A, Malenica, M, Mandrioli, G, Matsuo, T, Matsushita, T, Matveev, V, Mauri, N, Medinaceli, E, Meregaglia, A, Mikado, S, Miyanishi, M, Mizutani, F, Monacelli, P, Montesi, M, Morishima, K, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Nakatsuka, Y, Niwa, K, Ogawa, S, Olchevsky, A, Omura, T, Ozaki, K, Paoloni, A, Paparella, L, Park, B, Park, I, Pasqualini, L, Pastore, A, Patrizii, L, Pessard, H, Pistillo, C, Podgrudkov, D, Polukhina, N, Pozzato, M, Pupilli, F, Roda, M, Roganova, T, Rokujo, H, Rosa, G, Ryazhskaya, O, Sato, O, Schembri, A, Schmidt Parzefall, W, Shakirianova, I, Shchedrina, T, Sheshukov, A, Shibuya, H, Shiraishi, T, Shoziyoev, G, Simone, S, Sioli, M, Sirignano, C, Sirri, G, Sotnikov, A, Spinetti, M, Stanco, L, Starkov, N, Stellacci, S, Stipcevic, M, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Tufanli, S, Vilain, P, Vladymyrov, M, Votano, L, Vuilleumier, J, Wilquet, G, Wonsak, B, Yoon, C, and Zemskova, S

Subjects
Particle physics, Physics::Instrumentation and Detectors, General Physics and Astronomy, FOS: Physical sciences, CERN Neutrinos to Gran Sasso, Neutrino beam, Neutrino, OPERA, discovery, appearance, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, CNGS, Physics and Astronomy (all), High Energy Physics - Experiment (hep-ex), 0103 physical sciences, OPERA experiment, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], neutrino oscillation, tau, 010306 general physics, Neutrino oscillation, Charged current, Neutrino oscillations, Physics, 010308 nuclear & particles physics, hep-ex, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Particle Physics - Experiment, FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
Abstract

The OPERA experiment was designed to search for $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations in appearance mode, i.e. by detecting the $\tau$-leptons produced in charged current $\nu_{\tau}$ interactions. The experiment took data from 2008 to 2012 in the CERN Neutrinos to Gran Sasso beam. The observation of $\nu_{\mu} \rightarrow \nu_{\tau}$ appearance, achieved with four candidate events in a sub-sample of the data, was previously reported. In this paper, a fifth $\nu_{\tau}$ candidate event, found in an enlarged data sample, is described. Together with a further reduction of the expected background, the candidate events detected so far allow assessing the discovery of $\nu_{\mu}\rightarrow \nu_{\tau}$ oscillations in appearance mode with a significance larger than 5 $\sigma$., Comment: 7 pages, 3 figures

Published
2015
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3. First Measurement of ν_{e} and ν_{μ} Interaction Cross Sections at the LHC with FASER's Emulsion Detector.

Author

Abraham RM, Anders J, Antel C, Ariga A, Ariga T, Atkinson J, Bernlochner FU, Boeckh T, Boyd J, Brenner L, Burger A, Cadoux F, Cardella R, Casper DW, Cavanagh C, Chen X, Coccaro A, Débieux S, D'Onofrio M, Desai A, Dmitrievsky S, Eley S, Favre Y, Fellers D, Feng JL, Fenoglio CA, Ferrere D, Fieg M, Filali W, Fujimori H, Garabaglu A, Gibson S, Gonzalez-Sevilla S, Gornushkin Y, Gwilliam C, Hayakawa D, Hsu SC, Hu Z, Iacobucci G, Inada T, Iodice L, Jakobsen S, Joos H, Kajomovitz E, Kanai T, Kawahara H, Keyken A, Kling F, Köck D, Kontaxakis P, Kose U, Kotitsa R, Kuehn S, Kugathasan T, Lefebvre H, Levinson L, Li K, Liu J, Lutz MS, MacDonald J, Magliocca C, Martinelli F, McCoy L, McFayden J, Medina AP, Milanesio M, Moretti T, Munker M, Nakamura M, Nakano T, Neuhaus F, Nevay L, Nonaka M, Okui K, Ohashi K, Otono H, Pang H, Paolozzi L, Petersen B, Prim M, Queitsch-Maitland M, Rokujo H, Ruiz-Choliz E, Rubbia A, Sabater-Iglesias J, Sato O, Scampoli P, Schmieden K, Schott M, Sfyrla A, Shamim M, Shively S, Takubo Y, Tarannum N, Theiner O, Torrence E, Vasina S, Vormwald B, Wang D, Wang Y, Welch E, Zahorec S, Zambito S, and Zhang S

Abstract

The first results of the study of high-energy electron neutrino (ν_{e}) and muon neutrino (ν_{μ}) charged-current interactions in the FASERν emulsion-tungsten detector of the FASER experiment at the LHC are presented. A 128.8 kg subset of the FASERν volume was analyzed after exposure to 9.5  fb^{-1} of sqrt[s]=13.6  TeV pp data. Four (eight) ν_{e} (ν_{μ}) interaction candidate events are observed with a statistical significance of 5.2σ (5.7σ). This is the first direct observation of ν_{e} interactions at a particle collider and includes the highest-energy ν_{e} and ν_{μ} ever detected from an artificial source. The interaction cross section per nucleon σ/E_{ν} is measured over an energy range of 560-1740 GeV (520-1760 GeV) for ν_{e} (ν_{μ}) to be (1.2_{-0.7}^{+0.8})×10^{-38}  cm^{2} GeV^{-1} [(0.5±0.2)×10^{-38}  cm^{2} GeV^{-1}], consistent with standard model predictions. These are the first measurements of neutrino interaction cross sections in those energy ranges.

Published
2024
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4. First Direct Observation of Collider Neutrinos with FASER at the LHC.

Author

Abreu H, Anders J, Antel C, Ariga A, Ariga T, Atkinson J, Bernlochner FU, Blesgen T, Boeckh T, Boyd J, Brenner L, Cadoux F, Casper DW, Cavanagh C, Chen X, Coccaro A, Desai A, Dmitrievsky S, D'Onofrio M, Favre Y, Fellers D, Feng JL, Fenoglio CA, Ferrere D, Gibson S, Gonzalez-Sevilla S, Gornushkin Y, Gwilliam C, Hayakawa D, Hsu SC, Hu Z, Iacobucci G, Inada T, Jakobsen S, Joos H, Kajomovitz E, Kawahara H, Keyken A, Kling F, Köck D, Kose U, Kotitsa R, Kuehn S, Lefebvre H, Levinson L, Li K, Liu J, MacDonald J, Magliocca C, Martinelli F, McFayden J, Milanesio M, Mladenov D, Moretti T, Munker M, Nakamura M, Nakano T, Nessi M, Neuhaus F, Nevay L, Otono H, Pang H, Paolozzi L, Petersen B, Pietropaolo F, Prim M, Queitsch-Maitland M, Resnati F, Rokujo H, Ruiz-Choliz E, Sabater-Iglesias J, Sato O, Scampoli P, Schmieden K, Schott M, Sfyrla A, Shively S, Takubo Y, Tarannum N, Theiner O, Torrence E, Tufanli S, Vasina S, Vormwald B, Wang D, Welch E, and Zambito S

Abstract

We report the first direct observation of neutrino interactions at a particle collider experiment. Neutrino candidate events are identified in a 13.6 TeV center-of-mass energy pp collision dataset of 35.4  fb^{-1} using the active electronic components of the FASER detector at the Large Hadron Collider. The candidates are required to have a track propagating through the entire length of the FASER detector and be consistent with a muon neutrino charged-current interaction. We infer 153_{-13}^{+12} neutrino interactions with a significance of 16 standard deviations above the background-only hypothesis. These events are consistent with the characteristics expected from neutrino interactions in terms of secondary particle production and spatial distribution, and they imply the observation of both neutrinos and anti-neutrinos with an incident neutrino energy of significantly above 200 GeV.

Published
2023
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5. Noise-Induced Acceleration of Single Molecule Kinesin-1.

Author

Ariga T, Tateishi K, Tomishige M, and Mizuno D

Subjects
Cells enzymology, Kinetics, Models, Biological, Acceleration, Cells metabolism, Kinesins metabolism
Abstract

The movement of single kinesin molecules was observed while applying noisy external forces that mimic intracellular active fluctuations. We found kinesin accelerates under noise, especially when a large hindering load is added. The behavior quantitatively conformed to a theoretical model that describes the kinesin movement with simple two-state reactions. The universality of the kinetic theory suggests that intracellular enzymes share a similar noise-induced acceleration mechanism, i.e., active fluctuations in cells are not just noise but are utilized to promote various physiological processes.

Published
2021
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6. Nonequilibrium Energetics of Molecular Motor Kinesin.

Author

Ariga T, Tomishige M, and Mizuno D

Abstract

Nonequilibrium energetics of single molecule translational motor kinesin was investigated by measuring heat dissipation from the violation of the fluctuation-response relation of a probe attached to the motor using optical tweezers. The sum of the dissipation and work did not amount to the input free energy change, indicating large hidden dissipation exists. Possible sources of the hidden dissipation were explored by analyzing the Langevin dynamics of the probe, which incorporates the two-state Markov stepper as a kinesin model. We conclude that internal dissipation is dominant.

Published
2018
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7. Final Results of the OPERA Experiment on ν_{τ} Appearance in the CNGS Neutrino Beam.

Author

Agafonova N, Alexandrov A, Anokhina A, Aoki S, Ariga A, Ariga T, Bertolin A, Bozza C, Brugnera R, Buonaura A, Buontempo S, Chernyavskiy M, Chukanov A, Consiglio L, D'Ambrosio N, De Lellis G, De Serio M, Del Amo Sanchez P, Di Crescenzo A, Di Ferdinando D, Di Marco N, Dmitrievsky S, Dracos M, Duchesneau D, Dusini S, Dzhatdoev T, Ebert J, Ereditato A, Favier J, Fini RA, Fornari F, Fukuda T, Galati G, Garfagnini A, Gentile V, Goldberg J, Gorbunov S, Gornushkin Y, Grella G, Guler AM, Gustavino C, Hagner C, Hara T, Hayakawa T, Hollnagel A, Ishiguro K, Iuliano A, Jakovcic K, Jollet C, Kamiscioglu C, Kamiscioglu M, Kim SH, Kitagawa N, Klicek B, Kodama K, Komatsu M, Kose U, Kreslo I, Laudisio F, Lauria A, Ljubicic A, Longhin A, Loverre P, Malenica M, Malgin A, Mandrioli G, Matsuo T, Matveev V, Mauri N, Medinaceli E, Meregaglia A, Mikado S, Miyanishi M, Mizutani F, Monacelli P, Montesi MC, Morishima K, Muciaccia MT, Naganawa N, Naka T, Nakamura M, Nakano T, Niwa K, Ogawa S, Okateva N, Olchevsky A, Ozaki K, Paoloni A, Paparella L, Park BD, Pasqualini L, Pastore A, Patrizii L, Pessard H, Pistillo C, Podgrudkov D, Polukhina N, Pozzato M, Pupilli F, Roda M, Roganova T, Rokujo H, Rosa G, Ryazhskaya O, Sadovsky A, Sato O, Schembri A, Shakiryanova I, Shchedrina T, Shibayama E, Shibuya H, Shiraishi T, Simone S, Sirignano C, Sirri G, Sotnikov A, Spinetti M, Stanco L, Starkov N, Stellacci SM, Stipcevic M, Strolin P, Takahashi S, Tenti M, Terranova F, Tioukov V, Tufanli S, Ustyuzhanin A, Vasina S, Vilain P, Voevodina E, Votano L, Vuilleumier JL, Wilquet G, Wonsak B, and Yoon CS

Abstract

The OPERA experiment was designed to study ν_{μ}→ν_{τ} oscillations in the appearance mode in the CERN to Gran Sasso Neutrino beam (CNGS). In this Letter, we report the final analysis of the full data sample collected between 2008 and 2012, corresponding to 17.97×10^{19} protons on target. Selection criteria looser than in previous analyses have produced ten ν_{τ} candidate events, thus reducing the statistical uncertainty in the measurement of the oscillation parameters and of ν_{τ} properties. A multivariate approach for event identification has been applied to the candidate events and the discovery of ν_{τ} appearance is confirmed with an improved significance level of 6.1σ. |Δm_{32}^{2}| has been measured, in appearance mode, with an accuracy of 20%. The measurement of the ν_{τ} charged-current cross section, for the first time with a negligible contamination from ν[over ¯]_{τ}, and the first direct evidence for the ν_{τ} lepton number are also reported.

Published
2018
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8. Discovery of τ Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment.

Author

Agafonova N, Aleksandrov A, Anokhina A, Aoki S, Ariga A, Ariga T, Bender D, Bertolin A, Bodnarchuk I, Bozza C, Brugnera R, Buonaura A, Buontempo S, Büttner B, Chernyavsky M, Chukanov A, Consiglio L, D'Ambrosio N, De Lellis G, De Serio M, Del Amo Sanchez P, Di Crescenzo A, Di Ferdinando D, Di Marco N, Dmitrievski S, Dracos M, Duchesneau D, Dusini S, Dzhatdoev T, Ebert J, Ereditato A, Fini RA, Fornari F, Fukuda T, Galati G, Garfagnini A, Goldberg J, Gornushkin Y, Grella G, Guler AM, Gustavino C, Hagner C, Hara T, Hayakawa H, Hollnagel A, Hosseini B, Ishiguro K, Jakovcic K, Jollet C, Kamiscioglu C, Kamiscioglu M, Kim JH, Kim SH, Kitagawa N, Klicek B, Kodama K, Komatsu M, Kose U, Kreslo I, Laudisio F, Lauria A, Ljubicic A, Longhin A, Loverre PF, Malgin A, Malenica M, Mandrioli G, Matsuo T, Matsushita T, Matveev V, Mauri N, Medinaceli E, Meregaglia A, Mikado S, Miyanishi M, Mizutani F, Monacelli P, Montesi MC, Morishima K, Muciaccia MT, Naganawa N, Naka T, Nakamura M, Nakano T, Nakatsuka Y, Niwa K, Ogawa S, Olchevsky A, Omura T, Ozaki K, Paoloni A, Paparella L, Park BD, Park IG, Pasqualini L, Pastore A, Patrizii L, Pessard H, Pistillo C, Podgrudkov D, Polukhina N, Pozzato M, Pupilli F, Roda M, Roganova T, Rokujo H, Rosa G, Ryazhskaya O, Sato O, Schembri A, Schmidt-Parzefall W, Shakirianova I, Shchedrina T, Sheshukov A, Shibuya H, Shiraishi T, Shoziyoev G, Simone S, Sioli M, Sirignano C, Sirri G, Sotnikov A, Spinetti M, Stanco L, Starkov N, Stellacci SM, Stipcevic M, Strolin P, Takahashi S, Tenti M, Terranova F, Tioukov V, Tufanli S, Vilain P, Vladymyrov M, Votano L, Vuilleumier JL, Wilquet G, Wonsak B, Yoon CS, and Zemskova S

Abstract

The OPERA experiment was designed to search for ν_{μ}→ν_{τ} oscillations in appearance mode, i.e., by detecting the τ leptons produced in charged current ν_{τ} interactions. The experiment took data from 2008 to 2012 in the CERN Neutrinos to Gran Sasso beam. The observation of the ν_{μ}→ν_{τ} appearance, achieved with four candidate events in a subsample of the data, was previously reported. In this Letter, a fifth ν_{τ} candidate event, found in an enlarged data sample, is described. Together with a further reduction of the expected background, the candidate events detected so far allow us to assess the discovery of ν_{μ}→ν_{τ} oscillations in appearance mode with a significance larger than 5σ.

Published
2015
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9. Precise measurement of the neutrino mixing parameter θ23 from muon neutrino disappearance in an off-axis beam.

Author

Abe K, Adam J, Aihara H, Akiri T, Andreopoulos C, Aoki S, Ariga A, Ariga T, Assylbekov S, Autiero D, Barbi M, Barker GJ, Barr G, Bass M, Batkiewicz M, Bay F, Bentham SW, Berardi V, Berger BE, Berkman S, Bertram I, Bhadra S, Blaszczyk Fd, 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, Di Lodovico F, Di Luise S, Drapier O, Duboyski T, Duffy K, Dufour F, Dumarchez J, Dytman S, Dziewiecki M, Emery S, Ereditato A, Escudero L, Finch AJ, Floetotto L, Friend M, Fujii Y, Fukuda Y, Furmanski AP, Galymov V, Giffin S, Giganti C, Gilje K, Goeldi D, Golan T, 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, Iwai E, Iyogi K, Izmaylov A, Jacob A, Jamieson B, Johnson RA, Jo JH, Jonsson P, Jung CK, Kabirnezhad M, Kaboth AC, Kajita T, Kakuno H, Kameda J, Kanazawa Y, Karlen D, Karpikov I, Kearns E, Khabibullin M, Khotjantsev A, Kielczewska D, Kikawa T, Kilinski A, Kim J, Kisiel J, Kitching P, Kobayashi T, Koch L, Kolaceke A, Konaka A, Kormos LL, Korzenev A, Koseki K, Koshio Y, Kreslo I, Kropp W, Kubo H, Kudenko Y, Kumaratunga S, Kurjata R, Kutter T, Lagoda J, Laihem K, Lamont I, Laveder M, Lawe M, Lazos M, Lee KP, Lindner T, Lister C, Litchfield RP, Longhin A, Ludovici L, Macaire M, Magaletti L, Mahn K, Malek M, Manly S, Marino AD, Marteau J, Martin JF, Maruyama T, Marzec J, Mathie EL, Matveev V, Mavrokoridis K, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Metelko C, Mezzetto M, Mijakowski P, Miller CA, Minamino A, Mineev O, Mine S, Missert A, Miura M, Monfregola L, Moriyama S, Mueller TA, Murakami A, Murdoch M, Murphy S, Myslik J, Nagasaki T, Nakadaira T, Nakahata M, Nakai T, Nakamura K, Nakayama S, Nakaya T, Nakayoshi K, Naples D, Nielsen C, Nirkko M, Nishikawa K, Nishimura Y, O'Keeffe HM, Ohta R, Okumura K, Okusawa T, Oryszczak W, Oser SM, Owen RA, Oyama Y, Palladino V, Palomino J, Paolone V, Payne D, Perevozchikov O, Perkin JD, Petrov Y, Pickard L, Pinzon Guerra ES, Pistillo C, Plonski P, Poplawska E, Popov B, Posiadala M, Poutissou JM, Poutissou R, Przewlocki P, Quilain B, Radicioni E, Ratoff PN, Ravonel M, Rayner MA, Redij A, Reeves M, Reinherz-Aronis E, Retiere F, Robert A, Rodrigues PA, Rojas P, Rondio E, Roth S, Rubbia A, Ruterbories D, Sacco R, Sakashita K, Sánchez F, Sato F, Scantamburlo E, Scholberg K, Schoppmann S, Schwehr J, Scott M, Seiya Y, Sekiguchi T, Sekiya H, Sgalaberna D, 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, Suda Y, Suzuki A, Suzuki K, Suzuki SY, Suzuki Y, Szeglowski T, Tacik R, Tada M, Takahashi S, Takeda A, Takeuchi Y, Tanaka HK, Tanaka HA, Tanaka MM, Terhorst D, Terri R, Thompson LF, Thorley A, Tobayama S, Toki W, Tomura T, Totsuka Y, Touramanis C, 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, Yu M, Zalewska A, Zalipska J, Zambelli L, Zaremba K, Ziembicki M, Zimmerman ED, Zito M, and Żmuda J

Abstract

New data from the T2K neutrino oscillation experiment produce the most precise measurement of the neutrino mixing parameter θ23. Using an off-axis neutrino beam with a peak energy of 0.6 GeV and a data set corresponding to 6.57×10(20) protons on target, T2K has fit the energy-dependent νμ oscillation probability to determine oscillation parameters. The 68% confidence limit on sin(2)(θ23) is 0.514(-0.056)(+0.055) (0.511±0.055), assuming normal (inverted) mass hierarchy. The best-fit mass-squared splitting for normal hierarchy is Δm32(2)=(2.51±0.10)×10(-3)  eV(2)/c(4) (inverted hierarchy: Δm13(2)=(2.48±0.10)×10(-3)  eV(2)/c(4)). Adding a model of multinucleon interactions that affect neutrino energy reconstruction is found to produce only small biases in neutrino oscillation parameter extraction at current levels of statistical uncertainty.

Published
2014
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10. Observation of electron neutrino appearance in a muon neutrino beam.

Author

Abe K, Adam J, Aihara H, Akiri T, Andreopoulos C, Aoki S, Ariga A, Ariga T, Assylbekov S, Autiero D, Barbi M, Barker GJ, Barr G, Bass M, Batkiewicz M, Bay F, Bentham SW, Berardi V, Berger BE, Berkman S, Bertram I, Bhadra S, Blaszczyk FD, 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, Di Lodovico F, Di Luise S, Drapier O, Duboyski T, Duffy K, Dufour F, Dumarchez J, Dytman S, Dziewiecki M, Emery S, Ereditato A, Escudero L, Finch AJ, Floetotto L, Friend M, Fujii Y, Fukuda Y, Furmanski AP, Galymov V, Gaudin A, Giffin S, Giganti C, Gilje K, Goeldi D, 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, Jung CK, Kaboth AC, Kajita T, Kakuno H, Kameda J, Kanazawa Y, Karlen D, Karpikov I, Kearns E, Khabibullin M, Khotjantsev A, Kielczewska D, Kikawa T, Kilinski A, Kim J, Kisiel J, Kitching P, Kobayashi T, Koch L, Kolaceke A, Konaka A, Kormos LL, Korzenev A, Koseki K, Koshio Y, Kreslo I, Kropp W, Kubo H, Kudenko Y, Kumaratunga S, Kurjata R, Kutter T, Lagoda J, Laihem K, Lamont I, Laveder M, Lawe M, Lazos M, Lee KP, Licciardi C, Lindner T, Lister C, Litchfield RP, Longhin A, Ludovici L, Macaire M, Magaletti L, Mahn K, Malek M, Manly S, Marino AD, Marteau J, Martin JF, Maruyama T, Marzec J, Mathie EL, Matveev V, Mavrokoridis K, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Metelko C, Mezzetto M, Mijakowski P, Miller CA, Minamino A, Mineev O, Mine S, Missert A, Miura M, Monfregola L, Moriyama S, Mueller TA, Murakami A, Murdoch M, Murphy S, Myslik J, Nagasaki T, Nakadaira T, Nakahata M, Nakai T, Nakamura K, Nakayama S, Nakaya T, Nakayoshi K, Naples D, Nielsen C, Nirkko M, Nishikawa K, Nishimura Y, O'Keeffe HM, Ohta R, Okumura K, Okusawa T, Oryszczak W, Oser SM, Owen RA, Oyama Y, Palladino V, Paolone V, Payne D, Pearce GF, Perevozchikov O, Perkin JD, Petrov Y, Pickard LJ, Pinzon Guerra ES, Pistillo C, Plonski P, Poplawska E, Popov B, Posiadala M, Poutissou JM, Poutissou R, Przewlocki P, Quilain B, Radicioni E, Ratoff PN, Ravonel M, Rayner MA, Redij A, Reeves M, Reinherz-Aronis E, Retiere F, Robert A, Rodrigues PA, Rojas P, Rondio E, Roth S, Rubbia A, Ruterbories D, Sacco R, Sakashita K, Sánchez F, Sato F, Scantamburlo E, Scholberg K, Schwehr J, Scott M, Seiya Y, Sekiguchi T, Sekiya H, Sgalaberna D, 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, Suda Y, Suzuki A, Suzuki K, Suzuki SY, Suzuki Y, Szeglowski T, Tacik R, Tada M, Takahashi S, Takeda A, Takeuchi Y, Tanaka HK, Tanaka HA, Tanaka MM, Terhorst D, Terri R, Thompson LF, Thorley A, Tobayama S, Toki W, Tomura T, Totsuka Y, Touramanis C, 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, Zalipska J, Zambelli L, Zaremba K, Ziembicki M, Zimmerman ED, Zito M, and Zmuda J

Abstract

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 7.3σ when compared to 4.92±0.55 expected background events. In the Pontecorvo-Maki-Nakagawa-Sakata mixing model, the electron neutrino appearance signal depends on several parameters including three mixing angles θ12, θ23, θ13, a mass difference Δm(32)(2) and a CP violating phase δ(CP). In this neutrino oscillation scenario, assuming |Δm(32)(2)|=2.4×10(-3)  eV(2), sin(2)θ(23)=0.5, and Δm322>0 (Δm(32)(2)<0), a best-fit value of sin(2)2θ(13)=0.140(-0.032)(+0.038) (0.170(-0.037)(+0.045)) is obtained at δ(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(CP) are disfavored at the 90% C.L.

Published
2014
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11. Measurement of neutrino oscillation parameters from muon neutrino disappearance with an off-axis beam.

Author

Abe K, Adam J, Aihara H, Akiri T, Andreopoulos C, Aoki S, Ariga A, Ariga T, Assylbekov S, Autiero D, Barbi M, Barker GJ, Barr G, Bass M, Batkiewicz M, Bay F, Bentham SW, Berardi V, Berger BE, Berkman S, Bertram I, Bhadra S, Blaszczyk FD, 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, Curioni A, Dabrowska A, Danko I, Das R, Davis S, de Perio P, De Rosa G, Dealtry T, Dennis SR, Densham C, Di Lodovico F, Di Luise S, Drapier O, Duboyski T, Duffy K, Dufour F, Dumarchez J, Dytman S, Dziewiecki M, Emery S, Ereditato A, Escudero L, Finch AJ, Frank E, Friend M, Fujii Y, Fukuda Y, Furmanski AP, 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 AC, Kajita T, Kakuno H, Kameda J, Kanazawa Y, Karlen D, Karpikov I, Kearns E, Khabibullin M, Khotjantsev A, Kielczewska D, Kikawa T, Kilinski A, Kim J, Kim SB, Kisiel J, Kitching P, Kobayashi T, Kogan G, Kolaceke A, Konaka A, Kormos LL, Korzenev A, Koseki K, Koshio Y, Kreslo I, Kropp W, Kubo H, Kudenko Y, Kumaratunga S, Kurjata R, Kutter T, Lagoda J, Laihem K, 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, Marino AD, Marteau J, Martin JF, Maruyama T, Marzec J, Masliah P, Mathie EL, Matveev V, Mavrokoridis K, Mazzucato E, McCarthy M, McCauley N, McFarland KS, McGrew C, Metelko C, Mijakowski P, Miller CA, Minamino A, Mineev O, Mine S, Missert A, Miura M, Monfregola L, Moriyama S, Mueller TA, Murakami A, Murdoch M, Murphy S, Myslik J, Nagasaki T, Nakadaira T, Nakahata M, Nakai T, Nakamura K, Nakayama S, Nakaya T, Nakayoshi K, Naples D, Nielsen C, Nirkko M, Nishikawa K, Nishimura Y, O'Keeffe HM, Ohta R, Okumura K, Okusawa T, Oryszczak W, Oser SM, Otani M, Owen RA, Oyama Y, Pac MY, Palladino V, Paolone V, Payne D, Pearce GF, Perevozchikov O, Perkin JD, Petrov Y, Pinzon Guerra ES, Pistillo C, Plonski P, Poplawska E, Popov B, Posiadala M, Poutissou JM, Poutissou R, Przewlocki P, Quilain B, Radicioni E, Ratoff PN, Ravonel M, Rayner MA, Redij A, Reeves M, Reinherz-Aronis E, Retiere F, Robert A, Rodrigues PA, Rondio E, Roth S, Rubbia A, Ruterbories D, Sacco R, Sakashita K, Sánchez F, Sato F, Scantamburlo E, Scholberg K, Schwehr J, Scott M, Seiya Y, Sekiguchi T, Sekiya H, Sgalaberna D, 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, Suda Y, Suzuki A, Suzuki K, Suzuki SY, Suzuki Y, Szeglowski T, Tacik R, Tada M, Takahashi S, Takeda A, Takeuchi Y, Tanaka HK, Tanaka HA, Tanaka MM, Taylor IJ, Terhorst D, Terri R, Thompson LF, Thorley A, Tobayama S, Toki W, Tomura T, Totsuka Y, Touramanis C, 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, Zalipska J, Zambelli L, Zaremba K, Ziembicki M, Zimmerman ED, Zito M, and Zmuda J

Abstract

The T2K Collaboration reports a precision measurement of muon neutrino disappearance with an off-axis neutrino beam with a peak energy of 0.6 GeV. Near detector measurements are used to constrain the neutrino flux and cross section parameters. The Super-Kamiokande far detector, which is 295 km downstream of the neutrino production target, collected data corresponding to 3.01×10(20) protons on target. In the absence of neutrino oscillations, 205±17 (syst) events are expected to be detected while only 58 muon neutrino event candidates are observed. A fit to the neutrino rate and energy spectrum, assuming three neutrino flavors and normal mass hierarchy yields a best-fit mixing angle sin2(θ23)=0.514±0.082 and mass splitting |Δm(32)(2)|=2.44(-0.15)(+0.17)×10(-3) eV2/c4. Our result corresponds to the maximal oscillation disappearance probability.

Published
2013
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12. Indication of electron neutrino appearance from an accelerator-produced off-axis muon neutrino beam.

Author

Abe K, Abgrall N, Ajima Y, Aihara H, Albert JB, Andreopoulos C, Andrieu B, Aoki S, Araoka O, Argyriades J, Ariga A, Ariga T, Assylbekov S, Autiero D, Badertscher A, Barbi M, Barker GJ, Barr G, Bass M, Bay F, Bentham S, Berardi V, Berger BE, Bertram I, Besnier M, Beucher J, Beznosko D, Bhadra S, Blaszczyk Fd, Blondel A, Bojechko C, Bouchez J, Boyd SB, Bravar A, Bronner C, Brook-Roberge DG, Buchanan N, Budd H, Calvet D, Cartwright SL, Carver A, Castillo R, Catanesi MG, Cazes A, Cervera A, Chavez C, Choi S, Christodoulou G, Coleman J, Coleman W, Collazuol G, Connolly K, Curioni A, Dabrowska A, Danko I, Das R, Davies GS, Davis S, Day M, De Rosa G, de André JP, de Perio P, Delbart A, Densham C, Di Lodovico F, Di Luise S, Dinh Tran P, Dobson J, Dore U, Drapier O, Dufour F, Dumarchez J, Dytman S, Dziewiecki M, Dziomba M, Emery S, Ereditato A, Escudero L, Esposito LS, Fechner M, Ferrero A, Finch AJ, Frank E, Fujii Y, Fukuda Y, Galymov V, Gannaway FC, Gaudin A, Gendotti A, George MA, Giffin S, Giganti C, Gilje K, Golan T, Goldhaber M, Gomez-Cadenas JJ, Gonin M, Grant N, Grant A, Gumplinger P, Guzowski P, Haesler A, Haigh MD, Hamano K, Hansen C, Hansen D, Hara T, Harrison PF, Hartfiel B, Hartz M, Haruyama T, Hasegawa T, Hastings NC, Hastings S, Hatzikoutelis A, Hayashi K, Hayato Y, Hearty C, Helmer RL, Henderson R, Higashi N, Hignight J, Hirose E, Holeczek J, Horikawa S, Hyndman A, Ichikawa AK, Ieki K, Ieva M, Iida M, Ikeda M, Ilic J, Imber J, Ishida T, Ishihara C, Ishii T, Ives SJ, Iwasaki M, Iyogi K, Izmaylov A, Jamieson B, Johnson RA, Joo KK, Jover-Manas GV, Jung CK, Kaji H, Kajita T, Kakuno H, Kameda J, Kaneyuki K, Karlen D, Kasami K, Kato I, Kearns E, Khabibullin M, Khanam F, Khotjantsev A, Kielczewska D, Kikawa T, Kim J, Kim JY, Kim SB, Kimura N, Kirby B, Kisiel J, Kitching P, Kobayashi T, Kogan G, Koike S, Konaka A, Kormos LL, Korzenev A, Koseki K, Koshio Y, Kouzuma Y, Kowalik K, Kravtsov V, Kreslo I, Kropp W, Kubo H, Kudenko Y, Kulkarni N, Kurjata R, Kutter T, Lagoda J, Laihem K, Laveder M, Lee KP, Le PT, Levy JM, Licciardi C, Lim IT, Lindner T, Litchfield RP, Litos M, Longhin A, Lopez GD, Loverre PF, Ludovici L, Lux T, Macaire M, Mahn K, Makida Y, Malek M, Manly S, Marchionni A, Marino AD, Marteau J, Martin JF, Maruyama T, Maryon T, Marzec J, Masliah P, Mathie EL, Matsumura C, Matsuoka K, Matveev V, Mavrokoridis K, Mazzucato E, McCauley N, McFarland KS, McGrew C, McLachlan T, Messina M, Metcalf W, Metelko C, Mezzetto M, Mijakowski P, Miller CA, Minamino A, Mineev O, Mine S, Missert AD, Mituka G, Miura M, Mizouchi K, Monfregola L, Moreau F, Morgan B, Moriyama S, Muir A, Murakami A, Murdoch M, Murphy S, Myslik J, Nakadaira T, Nakahata M, Nakai T, Nakajima K, Nakamoto T, Nakamura K, Nakayama S, Nakaya T, Naples D, Navin ML, Nelson B, Nicholls TC, Nishikawa K, Nishino H, Nowak JA, Noy M, Obayashi Y, Ogitsu T, Ohhata H, Okamura T, Okumura K, Okusawa T, Oser SM, Otani M, Owen RA, Oyama Y, Ozaki T, Pac MY, Palladino V, Paolone V, Paul P, Payne D, Pearce GF, Perkin JD, Pettinacci V, Pierre F, Poplawska E, Popov B, Posiadala M, Poutissou JM, Poutissou R, Przewlocki P, Qian W, Raaf JL, Radicioni E, Ratoff PN, Raufer TM, Ravonel M, Raymond M, Retiere F, Robert A, Rodrigues PA, Rondio E, Roney JM, Rossi B, Roth S, Rubbia A, Ruterbories D, Sabouri S, Sacco R, Sakashita K, Sánchez F, Sarrat A, Sasaki K, Scholberg K, Schwehr J, Scott M, Scully DI, Seiya Y, Sekiguchi T, Sekiya H, Shibata M, Shimizu Y, Shiozawa M, Short S, Siyad M, Smith RJ, Smy M, Sobczyk JT, Sobel H, Sorel M, Stahl A, Stamoulis P, Steinmann J, Still B, Stone J, Strabel C, Sulak LR, Sulej R, Sutcliffe P, Suzuki A, Suzuki K, Suzuki S, Suzuki SY, Suzuki Y, Suzuki Y, Szeglowski T, Szeptycka M, Tacik R, Tada M, Takahashi S, Takeda A, Takenaga Y, Takeuchi Y, Tanaka K, Tanaka HA, Tanaka M, Tanaka MM, Tanimoto N, Tashiro K, Taylor I, Terashima A, Terhorst D, Terri R, Thompson LF, Thorley A, Toki W, Tomaru T, Totsuka Y, Touramanis C, Tsukamoto T, Tzanov M, Uchida Y, Ueno K, Vacheret A, Vagins M, Vasseur G, Wachala T, Walding JJ, Waldron AV, Walter CW, Wanderer PJ, Wang J, Ward MA, Ward GP, Wark D, Wascko MO, Weber A, Wendell R, West N, Whitehead LH, Wikström G, Wilkes RJ, Wilking MJ, Wilson JR, Wilson RJ, Wongjirad T, Yamada S, Yamada Y, Yamamoto A, Yamamoto K, Yamanoi Y, Yamaoka H, Yanagisawa C, Yano T, Yen S, Yershov N, Yokoyama M, Zalewska A, Zalipska J, Zambelli L, Zaremba K, Ziembicki M, Zimmerman ED, Zito M, and Żmuda J

Abstract

The T2K experiment observes indications of ν(μ) → ν(e) appearance in data accumulated with 1.43×10(20) protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with |Δm(23)(2)| = 2.4×10(-3)  eV(2), sin(2)2θ(23) = 1 and sin(2)2θ(13) = 0, the expected number of such events is 1.5±0.3(syst). Under this hypothesis, the probability to observe six or more candidate events is 7×10(-3), equivalent to 2.5σ significance. At 90% C.L., the data are consistent with 0.03(0.04) < sin(2)2θ(13) < 0.28(0.34) for δ(CP) = 0 and a normal (inverted) hierarchy.

Published
2011
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