1. Measurement of neutrino oscillation by the K2K experiment
- Author
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S. Andringa, T. Nakadaira, R. Gran, Tadayuki Takahashi, Yoshitaka Itow, Makoto Sakuda, F. Nakata, K. Fujii, A. Rodriguez, D. Kerr, M. H. Ahn, U. Dore, S. Likhoded, S P Mikheyev, K. Martens, Y. Totsuka, Y. Takubo, Kate Scholberg, Y. Takeuchi, Yu. Kudenko, Shinya Yamada, H. I. Jang, S. C. Boyd, M. Okumura, A. Blondel, A. Ikeda, K. Tashiro, Itsuo Nakano, C. K. Jung, M. Sekiguchi, H. Yokoyama, F. Pierre, Minoru Yoshida, M. Kitamura, L. Whitehead, K. Taki, S. Nawang, N. Yershov, Shogo Nishiyama, O. V. Mineev, E. Sharkey, K. Kaneyuki, Hirokazu Ishino, D. Kielczewska, Shoei Nakayama, Taichi Morita, Y. Kurimoto, Hiroyuki Noumi, T. Otaki, R. Schroeter, L. Ludovici, E. J. Jeon, Takashi Kobayashi, J. Kameda, M. Onchi, Y. Yamanoi, C. Cavata, M. Sorel, Katsuki Hiraide, H. C. Bhang, P. F. Loverre, J. Bouchez, M. Y. Pac, G. Sitjes, S. Mine, C. O. Kim, I. Kato, E. Seo, A. Shima, T. Kutter, K. Hayashi, H. So, S. M. Oser, T. Ishida, J. Hill, J. Catala, A. K. Ichikawa, Tomoyuki Maruyama, T. Hara, K. K. Joo, Lawrence Sulak, P. Novella, Susumu Noda, S. Fukuda, K. Takenaka, Yoshitaka Kuno, T. Ishii, Masaaki Tanaka, F. Nova, John G. Learned, Y. Yamada, B. H. Kang, Y. Obayashi, M. Takasaki, A. Minamino, A. Tornero-Lopez, J.J. Gómez-Cadenas, Takanori Sasaki, M. Fechner, S. Echigo, C. Yanagisawa, J. Zalipska, C. McGrew, G. Jover, J.H. Kim, K. Nakamura, K. B. McConnel Mahn, S. B. Kim, V. A. Matveev, M. Minakawa, A. Cervera, C. W. Walter, Y. Takenaga, Y. Hayato, Yuichi Oyama, Masaya Hasegawa, M. Miura, G. Kume, M. Tada, David William Casper, Takehisa Hasegawa, C. Mitsuda, K. Sato, J. Hosaka, A. Suzuki, R. L. Helmer, Hyosun Kim, Katsuhiro Kobayashi, A. Sakai, Nobuyuki Sakurai, Yusuke Koshio, S. Ueda, Shoji Yamamoto, J. Mallet, S. Matsuno, H. Takeuchi, T. Ooyabu, Masayuki Nakahata, Y. Aoyama, R. Terri, R. Ashie, H. Ishii, Y. Suga, Masashi Yokoyama, J. S. Jang, G. Mitsuka, E. Aliu, H. Tanaka, A. Sarrat, Mark R. Vagins, K. K. Shiraishi, Takaaki Kajita, Masaki Ishitsuka, Kenichi Tanaka, Yoshihiro Suzuki, H. Park, Masaharu Ieiri, X. Espinal, Y. Moriguchi, Beom Jun Kim, Michael B. Smy, Y. Fukuda, T. Iwashita, R. J. Wilkes, I. Higuchi, I. T. Lim, Y. Kato, W. R. Kropp, Federico Sanchez, Toshio Namba, C. Mariani, H. Maesaka, Ko Okumura, E. Kearns, Shigeki Aoki, T. Toshito, Hiroshi Sato, K. Asakura, P. Kitching, C. Mauger, J. Argyriades, H. Nishino, S. H. Lim, A. Okada, M. Kohama, M. Takatsuki, F. Berghaus, Tsuyoshi Nakaya, C. Saji, J. Kubota, Jordi Burguet-Castell, H. G. Berns, W. Wang, Masataka Iinuma, E. Hirose, J. Yoo, K. Nishikawa, J. Y. Kim, Henry W. Sobel, K. Nitta, Y. Tanaka, Masato Shiozawa, Shaomin Chen, A. Konaka, Shigetaka Moriyama, K. O. Cho, R. Nambu, N. Tamura, Silvia Borghi, J. L. Stone, T. Inagaki, A. N. Khotjantsev, Y. Fujii, J. H. Choi, M. M. Khabibullin, Stephane T'Jampens, E. Fernandez, I. S. Jeong, and K. Ishihara
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Tamura, Norio ,010308 nuclear & particles physics ,Oscillation ,T2K experiment ,FOS: Physical sciences ,Física ,Elementary particle ,7. Clean energy ,01 natural sciences ,High Energy Physics - Experiment ,Nuclear physics ,Massless particle ,High Energy Physics - Experiment (hep-ex) ,K2K experiment ,0103 physical sciences ,田村, 詔生 ,Neutrino ,010306 general physics ,Neutrino oscillation ,Lepton - Abstract
We present measurements of nu_mu disappearance in K2K, the KEK to Kamioka long-baseline neutrino oscillation experiment. One hundred and twelve beam-originated neutrino events are observed in the fiducial volume of Super-Kamiokande with an expectation of 158.1^{+9.2}_{-8.6} events without oscillation. A distortion of the energy spectrum is also seen in 58 single-ring muon-like events with reconstructed energies. The probability that the observations are explained by the expectation for no neutrino oscillation is 0.0015% (4.3sigma). In a two flavor oscillation scenario, the allowed Delta m^2 region at sin^2(2theta) is between 1.9 and 3.5 x 10^{-3} eV^2 at the 90% C.L. with a best-fit value of 2.8 x 10^{-3} eV^2., Comment: 40 pages, 48 figures
- Published
- 2006