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	Kinematic reconstruction of atmospheric neutrino events in a large water Cherenkov detector with proton identification
	Fechner, M. ; Abe, K. ; Hayato, Y. ; Iida, T. ; Ikeda, M. ; Kameda, J. ; Kobayashi, K. ; Koshio, Y. ; Miura, M. ; Moriyama, S. ; Nakahata, M. ; Nakayama, S. ; Obayashi, Y. ; Ogawa, H. ; Sekiya, H. ; Shiozawa, M. ; Suzuki, Y. ; Takeda, A. ; Takenaga, Y. ; Takeuchi, Y. ; Ueno, K. ; Ueshima, K. ; Watanabe, H. ; Yamada, S. ; Hazama, S. ; Higuchi, I. ; Ishihara, C. ; Kajita, T. ; Kaneyuki, K. ; Mitsuka, G. ; Nishino, H. ; Okumura, K. ; Tanimoto, N. ; Vagins, M. R. ; Dufour, F. ; Kearns, E. ; Litos, M. ; Raaf, J. L. ; Stone, J. L. ; Sulak, L. R. ; Wang, W. ; Goldhaber, M. ; Dazeley, S. ; Svoboda, R. ; Bayes, K. ; Casper, D. ; Cravens, J. P. ; Kropp, W. R. ; Mine, S. ; Regis, C. ; Smy, M. B. ; Sobel, H. W. ; Ganezer, K. S. ; Hill, J. ; Keig, W. E. ; Jang, J. S. ; Kim, J. Y. ; Lim, I. T. ; Scholberg, K. ; Walter, C. W. ; Wendell, R. ; Tasaka, S. ; Learned, J. G. ; Matsuno, S. ; Watanabe, Y. ; Hasegawa, T. ; Ishida, T. ; Ishii, T. ; Kobayashi, T. ; Nakadaira, T. ; Nakamura, K. ; Nishikawa, K. ; Oyama, Y. ; Sakashita, K. ; Sekiguchi, T. ; Tsukamoto, T. ; Suzuki, A. T. ; Minamino, A. ; Nakaya, T. ; Yokoyama, M. ; Fukuda, Y. ; Itow, Y. ; Tanaka, T. ; Jung, C. K. ; Lopez, G. ; McGrew, C. ; Terri, R. ; Yanagisawa, C. ; Tamura, N. ; Idehara, Y. ; Sakuda, M. ; Kuno, Y. ; Yoshida, M. ; Kim, S. B. ; Yang, B. S. ; Ishizuka, T. ; Okazawa, H. ; Choi, Y. ; Seo, H. K. ; Furuse, Y. ; Nishijima, K. ; Yokosawa, Y. ; Koshiba, M. ; Totsuka, Y. ; Chen, S. ; Heng, Y. ; Yang, Z. ; Zhang, H. ; Kielczewska, D. ; Thrane, E. ; Wilkes, R. J.
	2010-10-12 ; 2010-10-12
关键词	OSCILLATIONS SIMULATION PHYSICS Astronomy & Astrophysics Physics, Particles & Fields
中文摘要	We report the development of a proton identification method for the Super-Kamiokande (SK) detector. This new tool is applied to the search for events with a single proton track, a high purity neutral current sample of interest for sterile neutrino searches. After selection using a neural network, we observe 38 events in the combined SK-I and SK-II data corresponding to 2285.1 days of exposure, with an estimated signal-to-background ratio of 1.6 to 1. Proton identification was also applied to a direct search for charged-current quasielastic (CCQE) events, obtaining a high precision sample of fully kinematically reconstructed atmospheric neutrinos, which has not been previously reported in water Cherenkov detectors. The CCQE fraction of this sample is 55%, and its neutrino (as opposed to antineutrino) fraction is 91.7 +/- 3%. We selected 78 mu- like and 47 e-like events in the SK-I and SK-II data set. With this data, a clear zenith angle distortion of the neutrino direction itself is reported in a sub-GeV sample of mu neutrinos where the lepton angular correlation to the incoming neutrino is weak. Our fit to nu(mu) -> nu(tau) oscillations using the neutrino L/E distribution of the CCQE sample alone yields a wide acceptance region compatible with our previous results and excludes the no-oscillation hypothesis at 3-sigma.
语种	英语 ; 英语
出版者	AMER PHYSICAL SOC ; COLLEGE PK ; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78886]
专题	清华大学
推荐引用方式 GB/T 7714	Fechner, M.,Abe, K.,Hayato, Y.,et al. Kinematic reconstruction of atmospheric neutrino events in a large water Cherenkov detector with proton identification[J],2010, 2010.
APA	Fechner, M..,Abe, K..,Hayato, Y..,Iida, T..,Ikeda, M..,...&Wilkes, R. J..(2010).Kinematic reconstruction of atmospheric neutrino events in a large water Cherenkov detector with proton identification..
MLA	Fechner, M.,et al."Kinematic reconstruction of atmospheric neutrino events in a large water Cherenkov detector with proton identification".(2010).

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