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153. The T2K Neutrino Flux Prediction

Author

T2K Collaboration, Abe, K., Abgrall, N., Aihara, H., Akiri, T., Albert, J. B., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S. W., Berardi, V., Berger, B. E., Berkman, S., Bertram, I., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Boyd, S., Bravar, A., Bronner, C., Brook-Roberge, D. G., Buchanan, N., Calland, R. G., Rodriguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davis, S., Day, M., de Andre, J. P. A. M., de Perio, P., De Rosa, G., Dealtry, T., Densham, C., Di Lodovico, F., Di Luise, S., Dobson, J., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escudero, L., Esposito, L. S., Finch, A. J., Frank, E., Friend, M., Fujii, Y., Fukuda, Y., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Golan, T., Gomez-Cadenas, J. J., Gonin, M., Grant, N., Gudin, D., Guzowski, P., Hadley, D. R., Haesler, A., Haigh, M. D., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayato, Y., Hearty, C., Helmer, R. L., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Holeczek, J., Horikawa, S., Huang, K., Hyndman, A., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Ishida, T., Ishii, T., Ives, S. J., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R. A., Jo, J. H., Jonsson, P., Joo, K. K., Jover-Manas, G. V., Jung, C. K., 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, J. Y., Kim, J., Kim, S. B., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Konaka, A., Kormos, L. L., 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., Lee, K. P., Licciardi, C., Lim, I. T., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Lopez, G. D., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marchionni, A., Marino, A. D., Marteau, J., Martin, J. F., Maruyama, T., Marzec, J., Masliah, P., Mathie, E. L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Messina, M., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., 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, T. C., Nielsen, C., Nishikawa, K., Nishimura, Y., O'Keeffe, H. M., Obayashi, Y., Ohta, R., Okumura, K., Oryszczak, W., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Pac, M. Y., Palladino, V., Paolone, V., Payne, D., Pearce, G. F., Perevozchikov, O., Perkin, J. D., Guerra, E. S. Pinzon, Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Rato, P. N., Ravonel, M., Rayner, M. A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Rodrigues, P. A., Rondio, E., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Scully, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Sulej, R., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. A., Tanaka, M., Tanaka, M. M., Taylor, I. J., Terhorst, D., Terri, R., Thompson, L. F., 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, A. V., Walter, C. W., Wang, J., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wikstrom, G., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.

Subjects
High Energy Physics - Experiment
Abstract

The Tokai-to-Kamioka (T2K) experiment studies neutrino oscillations using an off-axis muon neutrino beam with a peak energy of about 0.6 GeV that originates at the J-PARC accelerator facility. Interactions of the neutrinos are observed at near detectors placed at 280 m from the production target and at the far detector -- Super-Kamiokande (SK) -- located 295 km away. The flux prediction is an essential part of the successful prediction of neutrino interaction rates at the T2K detectors and is an important input to T2K neutrino oscillation and cross section measurements. A FLUKA and GEANT3 based simulation models the physical processes involved in the neutrino production, from the interaction of primary beam protons in the T2K target, to the decay of hadrons and muons that produce neutrinos. The simulation uses proton beam monitor measurements as inputs. The modeling of hadronic interactions is re-weighted using thin target hadron production data, including recent charged pion and kaon measurements from the NA61/SHINE experiment. For the first T2K analyses the uncertainties on the flux prediction are evaluated to be below 15% near the flux peak. The uncertainty on the ratio of the flux predictions at the far and near detectors is less than 2% near the flux peak., Comment: 36 pages

Published
2012
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154. Search for Proton Decay into Muon plus Neutral Kaon in Super-Kamiokande I, II, and III

Author

Collaboration, The Super-Kamiokande, Regis, C., Abe, K., Hayato, Y., Iyogi, K., Kameda, J., Koshio, Y., Marti, Ll., Miura, M., Moriyama, S., Nakahata, M., Nakayama, S., Obayashi, Y., Sekiya, H., Shiozawa, M., Suzuki, Y., Takeda, A., Takenaga, Y., Ueno, K., Yokozawa, T., Kaji, H., Kajita, T., Kaneyuki, K., Lee, K. P., Okumura, K., McLachlan, T., Labarga, L., Kearns, E., Raaf, J. L., Stone, J. L., Sulak, L. R., Goldhaber, M., Bays, K., Carminati, G., Kropp, W. R., Mine, S., Renshaw, A., Smy, M. B., Sobel, H. W., Ganezer, K. S., Hill, J., Keig, W. E., Jang, J. S., Kim, J. Y., Lim, I. T., Albert, J. B., Scholberg, K., Walter, C. W., Wendell, R. A., Wongjirad, T., Ishizuka, T., Tasaka, S., Learned, J. G., Matsuno, S., Smith, S. N., 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., Takeuchi, Y., Ieki, K., Ikeda, M., Kubo, H., Minamino, A., Murakami, A., Nakaya, T., Fukuda, Y., Choi, K., Itow, Y., Mitsuka, G., Miyake, M., Mijakowski, P., Hignight, J., Imber, J., Jung, C. K., Taylor, I., Yanagisawa, C., Ishino, H., Kibayashi, A., Mori, T., Sakuda, M., Takeuchi, J., Kuno, Y., Kim, S. B., Okazawa, H., Choi, Y., Nishijima, K., Koshiba, M., Totsuka, Y., Yokoyama, M., Martens, K., Vagins, M. R., Chen, S., Sui, H., Yang, Z., Zhang, H., Connolly, K., Dziomba, M., and Wilkes, R. J.

Subjects
High Energy Physics - Experiment
Abstract

We have searched for proton into muon plus neutral kaon using data from a 91.7 kiloton-year exposure of Super-Kamiokande-I, a 49.2 kiloton-year exposure of Super-Kamiokande-II, and a 31.9 kiloton-year exposure of Super-Kamiokande-III. The number of candidate events in the data was consistent with the atmospheric neutrino background expectation and no evidence for proton decay in this mode was found. We set a partial lifetime lower limit of 1.6x10^33 years at the 90% confidence level., Comment: 15 pages, 13 figures

Published
2012
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155. Search for Nucleon Decay into Charged Anti-lepton plus Meson in Super-Kamiokande I and II

Author

Collaboration, Super-Kamiokande, Nishino, H., Abe, K., Hayato, Y., Iida, T., Ikeda, M., Kameda, J., Koshio, Y., Miura, M., Moriyama, S., Nakahata, M., Nakayama, S., Obayashi, Y., 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., Kaji, H., Kajita, T., Kaneyuki, K., Mitsuka, G., Okumura, K., Tanimoto, N., Dufour, F., Kearns, E., Litos, M., Raaf, J. L., Stone, J. L., Sulak, L. R., Goldhaber, M., Bays, K., 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., Albert, J. B., Scholberg, K., Walter, C. W., Wendell, R., Ishizuka, T., 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., Yanagisawa, C., Tamura, N., Idehara, Y., Sakuda, M., Kuno, Y., Yoshida, M., Kim, S. B., Yang, B. S., Okazawa, H., Choi, Y., Seo, H. K., Furuse, Y., Nishijima, K., Yokosawa, Y., Koshiba, M., Totsuka, Y., Vagins, M. R., Chen, S., Heng, Y., Liu, J., Yang, Z., Zhang, H., Kielczewska, D., Connolly, K., Thrane, E., and Wilkes, R. J.

Subjects
High Energy Physics - Experiment
Abstract

Searches for a nucleon decay into a charged anti-lepton (e^+ or {\mu}^+) plus a light meson ({\pi}^0, {\pi}^-, {\eta}, {\rho}^0, {\rho}^-, {\omega}) were performed using the Super-Kamiokande I and II data. Twelve nucleon decay modes were searched for. The total exposure is 140.9 kiloton \cdot years, which includes a 91.7 kiloton \cdot year exposure (1489.2 live days) of Super-Kamiokande-I and a 49.2 kiloton \cdot year exposure (798.6 live days) of Super-Kamiokande-II. The number of candidate events in the data was consistent with the atmospheric neutrino background expectation. No significant evidence for a nucleon decay was observed in the data. Thus, lower limits on the nucleon partial lifetime at 90% confidence level were obtained. The limits range from 3.6 \times 10^31 to 8.2 \times 10^33 years, depending on the decay modes., Comment: 25 pages, 18 figures

Published
2012
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156. Search for GUT Monopoles at Super-Kamiokande

Author

Collaboration, The Super-Kamiokande, Ueno, K., Abe, K., Hayato, Y., Iida, T., Iyogi, K., Kameda, J., Koshio, Y., Kozuma, Y., Miura, M., Moriyama, S., Nakahata, M., Nakayama, S., Obayashi, Y., Sekiya, H., Shiozawa, M., Suzuki, Y., Takeda, A., Takenaga, Y., Ueshima, K., Yamada, S., Yokozawa, T., Martens, K., Schuemann, J., Vagins, M., Ishihara, C., Kaji, H., Kajita, T., Kaneyuki, K., McLachlan, T., Okumura, K., Shimizu, Y., Tanimoto, N., Kearns, E., Litos, M., Raaf, J. L., Stone, J. L., Sulak, L. R., Bays, K., Kropp, W. R., Mine, S., Regis, C., Renshaw, A., Smy, M. B., Sobel, H. W., Ganezer, K. S., Hill, J., Keig, W. E., Jang, J. S., Kim, J. Y., Lim, I. T., Albert, J. B., Scholberg, K., Walter, C. W., Wendell, R., Wongjirad, T., Ishizuka, T., Tasaka, S., Learned, J. G., Matsuno, S., 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., Takeuchi, Y., Ikeda, M., Minamino, A., Nakaya, T., Labarga, L., Marti, Ll., Fukuda, Y., Itow, Y., Mitsuka, G., Tanaka, T., Jung, C. K., Lopez, G., Taylor, I., Yanagisawa, C., Ishino, H., Kibayashi, A., Mino, S., Mori, T., Sakuda, M., Toyota, H., Kuno, Y., Yoshida, M., Kim, S. B., Yang, B. S., Okazawa, H., Choi, Y., Nishijima, K., Koshiba, M., Totsuka, Y., Yokoyama, M., Chen, S., Heng, Y., Yang, Z., Zhang, H., Kielczewska, D., Mijakowski, P., Connolly, K., Dziomba, M., Thrane, E., and Wilkes, R. J.

Subjects
High Energy Physics - Experiment, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics
Abstract

GUT monopoles captured by the Sun's gravitation are expected to catalyze proton decays via the Callan-Rubakov process. In this scenario, protons, which initially decay into pions, will ultimately produce \nu_{e}, \nu_{\mu} and \bar{\nu}_{\mu}. After undergoing neutrino oscillation, all neutrino species appear when they arrive at the Earth, and can be detected by a 50,000 metric ton water Cherenkov detector, Super-Kamiokande (SK). A search for low energy neutrinos in the electron total energy range from 19 to 55 MeV was carried out with SK and gives a monopole flux limit of F_M(\sigma_0/1 mb) < 6.3 \times 10^{-24} (\beta_M/10^{-3})^2 cm^{-2} s^{-1} sr^{-1} at 90% C.L., where \beta_M is the monopole velocity in units of the speed of light and \sigma_0 is the catalysis cross section at \beta_M=1. The obtained limit is more than eight orders of magnitude more stringent than the current best cosmic-ray supermassive monopole flux limit, F_M < 1 \times 10^{-15} cm^{-2} s^{-1} sr^{-1} for \beta_M < 10^{-3} and also two orders of magnitude lower than the result of the Kamiokande experiment, which used a similar detection method., Comment: 15 pages, 6 figures

Published
2012
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157. First Muon-Neutrino Disappearance Study with an Off-Axis Beam

Author

T2K Collaboration, Abe, K., Abgrall, N., Ajima, Y., Aihara, H., Albert, J. B., Andreopoulos, C., Andrieu, B., Anerella, M. D., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Badertscher, A., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S., Berardi, V., Berger, B. E., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blocki, J., Blondel, A., Bojechko, C., Bouchez, J., Boyd, S. B., Bravar, A., Bronner, C., Brook-Roberge, D. G., Buchanan, N., Budd, H., Calland, R., Calvet, D., Rodriguez, J. Caravaca, Cartwright, S. L., Carver, A., Castillo, R., Catanesi, M. G., Cazes, A., Cervera, A., Chavez, C., Choi, S., Christodoulou, G., Coleman, J., Collazuol, G., Coleman, W., Connolly, K., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davies, G. S., Davis, S., Day, M., De Rosa, G., de André, J. P. A. M., de Perio, P., Dealtry, T., Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Tran, P. Dinh, Dobson, J., Dore, U., Drapier, O., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escallier, J. E., Escudero, L., Esposito, L. S., Fechner, M., Ferrero, A., Finch, A. J., Frank, E., Fujii, Y., Fukuda, Y., Galymov, V., Ganetis, G. L., Gannaway, F. C., Gaudin, A., Gendotti, A., George, M. A., Giffin, S., Giganti, C., Gilje, K., Ghosh, A. K., Golan, T., Goldhaber, M., Gomez-Cadenas, J. J., Gomi, S., Gonin, M., Grant, N., Grant, A., Gumplinger, P., Guzowski, P., Hadley, D. R., Haesler, A., Haigh, M. D., Hamano, K., Hansen, C., Hansen, D., Hara, T., Harrison, P. F., Hartfiel, B., Hartz, M., Haruyama, T., Hasegawa, T., Hastings, N. C., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Hearty, C., Helmer, R. L., Henderson, R., Higashi, N., Hignight, J., Hillairet, A., Hiraki, T., Hirose, E., Holeczek, J., Horikawa, S., Huang, K., Hyndman, A., Ichikawa, A. K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S. J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R. A., Joo, K. K., Jover-Manas, G. V., Jung, C. K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kaneyuki, K., Karlen, D., Kasami, K., Kato, I., Kawamuko, H., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, J., Kim, J. Y., Kim, S. B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Koike, S., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kouzuma, Y., Kowalik, K., Kravtsov, V., Kreslo, I., Kropp, W., Kubo, H., Kubota, J., Kudenko, Y., Kulkarni, N., Kurimoto, Y., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laing, A., Laveder, M., Lawe, M., Lee, K. P., Le, P. T., Levy, J. M., Licciardi, C., Lim, I. T., Lindner, T., Lister, C., Litchfield, R. P., Litos, M., Longhin, A., Lopez, G. D., Loverre, P. F., Ludovici, L., Lux, T., Macaire, M., Magaletti, L., Mahn, K., Makida, Y., Malek, M., Manly, S., Marchionni, A., Marino, A. D., Marone, A. J., Marteau, J., Martin, J. F., Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E. L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Messina, M., Metcalf, W., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A. D., Mituka, G., Miura, M., Mizouchi, K., Monfregola, L., Moreau, F., Morgan, B., Moriyama, S., Muir, A., Murakami, A., Muratore, J. F., Murdoch, M., Murphy, S., Myslik, J., Nagai, N., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamoto, T., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Navin, M. L., Nicholls, T. C., Nielsen, B., Nielsen, C., Nishikawa, K., Nishino, H., Nitta, K., Nobuhara, T., Nowak, J. A., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Ozaki, T., Pac, M. Y., Palladino, V., Paolone, V., Paul, P., Payne, D., Pearce, G. F., Perkin, J. D., Pettinacci, V., Pierre, F., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Qian, W., Raaf, J. L., Radicioni, E., Ratoff, P. N., Raufer, T. M., Ravonel, M., Raymond, M., Retiere, F., Robert, A., Rodrigues, P. A., Rondio, E., Roney, J. M., 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, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Sinclair, P. D., Siyad, M., Smith, B. M., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Stahl, A., Stamoulis, P., Steinmann, J., Still, B., Stone, J., Stodulski, M., Strabel, C., Sulej, R., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S. Y., Suzuki, Y., Swierblewski, J., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Taguchi, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, K., Tanaka, H. A., Tanaka, M., Tanaka, M. M., Tanimoto, N., Tashiro, K., Taylor, I., Terashima, A., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Toki, W., Tobayama, S., Tomaru, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Veledar, O., Wachala, T., Walding, J. J., Waldron, A. V., Walter, C. W., Wanderer, P. J., Wang, J., Ward, M. A., Ward, G. P., Wark, D., Wascko, M. O., Weber, A., Wendell, R., West, N., Whitehead, L. H., Wikström, G., Wilkes, R. J., Wilking, M. J., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, S., Yamada, Y., Yamamoto, A., Yamamoto, K., Yamanoi, Y., Yamaoka, H., Yamauchi, T., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.

Subjects
High Energy Physics - Experiment
Abstract

We report a measurement of muon-neutrino disappearance in the T2K experiment. The 295-km muon-neutrino beam from Tokai to Kamioka is the first implementation of the off-axis technique in a long-baseline neutrino oscillation experiment. With data corresponding to 1.43 10**20 protons on target, we observe 31 fully-contained single muon-like ring events in Super-Kamiokande, compared with an expectation of 104 +- 14 (syst) events without neutrino oscillations. The best-fit point for two-flavor nu_mu -> nu_tau oscillations is sin**2(2 theta_23) = 0.98 and |\Delta m**2_32| = 2.65 10**-3 eV**2. The boundary of the 90 % confidence region includes the points (sin**2(2 theta_23),|\Delta m**2_32|) = (1.0, 3.1 10**-3 eV**2), (0.84, 2.65 10**-3 eV**2) and (1.0, 2.2 10**-3 eV**2)., Comment: 7 pages, 4 figures

Published
2012
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158. Supernova Relic Neutrino Search at Super-Kamiokande

Author

Collaboration, The Super-Kamiokande, Bays, K., Iida, T., Abe, K., Hayato, Y., Iyogi, K., Kameda, J., Koshio, Y., Marti, L., Miura, M., Moriyama, S., Nakahata, M., Nakayama, S., Obayashi, Y., Sekiya, H., Shiozawa, M., Suzuki, Y., Takeda, A., Takenaga, Y., Ueno, K., Kajita, K. Ueshima S. Yamada T. Yokozawa H. Kaji T., Kaneyuki, K., McLachlan, T., Okumura, K., Pik, L. K., Martens, K., Vagins, M., Labarga, L., Kearns, E., Litos, M., Raaf, J. L., Stone, J. L., Sulak, L. R., Kropp, W. R., Mine, S., Regis, C., Renshaw, A., Smy, M. B., Sobel, H. W., Ganezer, K. S., Hill, J., Keig, W. E., Cho, S., Jang, J. S., Kim, J. Y., Lim, I. T., Albert, J., Scholberg, K., Walter, C. W., Wendell, R., Wongjirad, T., Ishizuka, T., Tasaka, S., Learned, J. G., Matsuno, S., Smith, S., 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., Takeuchi, Y., Ikeda, M., Matsuoka, K., Minamino, A., Murakami, A., Nakaya, T., Fukuda, Y., Itow, Y., Mitsuka, G., Miyake, M., Tanaka, T., Hignight, J., Imber, J., Jung, C. K., Taylor, I., Yanagisawa, C., Kibayashi, A., Ishino, H., Mino, S., Sakuda, M., Mori, T., Toyota, H., Kuno, Y., Kim, S. B., Yang, B. S., Okazawa, H., Choi, Y., Nishijima, K., Koshiba, M., Totsuka, Y., Yokoyama, M., Heng, Y., Chen, S., Zhang, H., Yang, Z., Mijakowski, P., Connolly, K., Dziomba, M., and Wilkes, R. J.

Subjects
High Energy Physics - Experiment
Abstract

A new Super-Kamiokande (SK) search for Supernova Relic Neutrinos (SRNs) was conducted using 2853 live days of data. Sensitivity is now greatly improved compared to the 2003 SK result, which placed a flux limit near many theoretical predictions. This more detailed analysis includes a variety of improvements such as increased efficiency, a lower energy threshold, and an expanded data set. New combined upper limits on SRN flux are between 2.8 and 3.0 nu_e cm^-2 s^-1 > 16 MeV total positron energy (17.3 MeV E_nu).

Published
2011
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159. Measurements of the T2K neutrino beam properties using the INGRID on-axis near detector

Author

Abe, K., Abgrall, N., Ajima, Y., Aihara, H., Albert, J. B., Andreopoulos, C., Andrieu, B., Anerella, M. D., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Badertscher, A., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S., Berardi, V., Berger, B. E., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blocki, J., Blondel, A., Bojechko, C., Bouchez, J., Boyd, S. B., Bravar, A., Bronner, C., Brook-Roberge, D. G., Buchanan, N., Budd, H., Calvet, D., Cartwright, S. L., Carver, A., Castillo, R., Catanesi, M. G., Cazes, A., Cervera, A., Chavez, C., Choi, S., Christodoulou, G., Coleman, J., Collazuol, G., Coleman, W., Connolly, K., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davies, G. S., Davis, S., Day, M., De Rosa, G., de André, J. P. A. M., de Perio, P., Dealtry, T., Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Tran, P. Dinh, Dobson, J., Dore, U., Drapier, O., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escallier, J. E., Escudero, L., Esposito, L. S., Fechner, M., Ferrero, A., Finch, A. J., Frank, E., Fujii, Y., Fukuda, Y., Galymov, V., Ganetis, G. L., Gannaway, F. C., Gaudin, A., Gendotti, A., George, M., Giffin, S., Giganti, C., Gilje, K., Ghosh, A. K., Golan, T., Goldhaber, M., Gomez-Cadenas, J. J., Gomi, S., Gonin, M., Grant, N., Grant, A., Gumplinger, P., Guzowski, P., Haesler, A., Haigh, M. D., Hamano, K., Hansen, C., Hansen, D., Hara, T., Harrison, P. F., Hartfiel, B., Hartz, M., Haruyama, T., Hasegawa, T., Hastings, N. C., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Hearty, C., Helmer, R. L., Henderson, R., Higashi, N., Hignight, J., Hillairet, A., Hirose, E., Holeczek, J., Horikawa, S., Hyndman, A., Ichikawa, A. K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S. J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R. A., Joo, K. K., Jover-Manas, G. V., Jung, C. K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kaneyuki, K., Karlen, D., Kasami, K., Kato, I., Kawamuko, H., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, J., Kim, J. Y., Kim, S. B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Koike, S., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kouzuma, Y., Kowalik, K., Kravtsov, V., Kreslo, I., Kropp, W., Kubo, H., Kubota, J., Kudenko, Y., Kulkarni, N., Kurimoto, Y., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laveder, M., Lee, K. P., Le, P. T., Levy, J. M., Licciardi, C., Lim, I. T., Lindner, T., Litchfield, R. P., Litos, M., Longhin, A., Lopez, G. D., Loverre, P. F., Ludovici, L., Lux, T., Macaire, M., Mahn, K., Makida, Y., Malek, M., Manly, S., Marchionni, A., Marino, A. D., Marone, A. J., Marteau, J., Martin, J. F., Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E. L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Messina, M., Metcalf, W., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A. D., Mituka, G., Miura, M., Mizouchi, K., Monfregola, L., Moreau, F., Morgan, B., Moriyama, S., Muir, A., Murakami, A., Muratore, J. F., Murdoch, M., Murphy, S., Myslik, J., Nagai, N., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamoto, T., Nakamura, K., Nakayama, S., Nakaya, T., Naples, D., Navin, M. L., Nelson, B., Nicholls, T. C., Nielsen, C., Nishikawa, K., Nishino, H., Nitta, K., Nobuhara, T., Nowak, J. A., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Ozaki, T., Pac, M. Y., Palladino, V., Paolone, V., Paul, P., Payne, D., Pearce, G. F., Perkin, J. D., Pettinacci, V., Pierre, F., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Qian, W., Raaf, J. L., Radicioni, E., Ratoff, P. N., Raufer, T. M., Ravonel, M., Raymond, M., Retiere, F., Robert, A., Rodrigues, P. A., Rondio, E., Roney, J. M., 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, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Siyad, M., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Stahl, A., Stamoulis, P., Steinmann, J., Still, B., Stone, J., Stodulski, M., Strabel, C., Sulej, R., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S. Y., Suzuki, Y., Swierblewski, J., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Taguchi, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, K., Tanaka, H. A., Tanaka, M., Tanaka, M. M., Tanimoto, N., Tashiro, K., Taylor, I., Terashima, A., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Toki, W., Tobayama, S., Tomaru, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Walding, J. J., Waldron, A. V., Walter, C. W., Wanderer, P. J., Wang, J., Ward, M. A., Ward, G. P., Wark, D., Wascko, M. O., Weber, A., Wendell, R., West, N., Whitehead, L. H., Wikström, G., Wilkes, R. J., Wilking, M. J., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, S., Yamada, Y., Yamamoto, A., Yamamoto, K., Yamanoi, Y., Yamaoka, H., Yamauchi, T., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.

Subjects
Physics - Instrumentation and Detectors
Abstract

Precise measurement of neutrino beam direction and intensity was achieved based on a new concept with modularized neutrino detectors. INGRID (Interactive Neutrino GRID) is an on-axis near detector for the T2K long baseline neutrino oscillation experiment. INGRID consists of 16 identical modules arranged in horizontal and vertical arrays around the beam center. The module has a sandwich structure of iron target plates and scintillator trackers. INGRID directly monitors the muon neutrino beam profile center and intensity using the number of observed neutrino events in each module. The neutrino beam direction is measured with accuracy better than 0.4 mrad from the measured profile center. The normalized event rate is measured with 4% precision., Comment: 32 pages, 27 figures, submitted to Nucl. Instr. and Meth. A

Published
2011
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160. Search for n-nbar oscillation in Super-Kamiokande

Author

collaboration, Super-Kamiokande, Abe, K., Hayato, Y., Iida, T., Ishihara, K., Kameda, J., Koshio, Y., Minamino, A., Mitsuda, C., Miura, M., Moriyama, S., Nakahata, M., Obayashi, Y., Ogawa, H., Sekiya, H., Shiozawa, M., Suzuki, Y., Takeda, A., Takeuchi, Y., Ueshima, K., Watanabe, H., Higuchi, I., Ishihara, C., Ishitsuka, M., Kajita, T., Kaneyuki, K., Mitsuka, G., Nakayama, S., Nishino, H., Okumura, K., Saji, C., Takenaga, Y., Clark, S., Desai, S., Dufour, F., Herfurth, A., Kearns, E., Likhoded, S., Litos, M., Raaf, J. L., Stone, J. L., Sulak, L. R., Wang, W., Goldhaber, M., Casper, D., Cravens, J. P., Dunmore, J., Griskevich, J., Kropp, W. R., Liu, D. W., Mine, S., Regis, C., Smy, M. B., Sobel, H. W., Vagins, M. R., Ganezer, K. S., Hartfiel, B., Hill, J., Keig, W. E., Jang, J. S., Jeoung, I. S., Kim, J. Y., Lim, I. T., Scholberg, K., Tanimoto, N., Walter, C. W., Wendell, R., Ellsworth, R. W., Tasaka, S., Guillian, G., Learned, J. G., Matsuno, S., Messier, M. D., Ichikawa, A. K., Ishida, T., Ishii, T., Iwashita, T., Kobayashi, T., Nakadaira, T., Nakamura, K., Nishikawa, K., Nitta, K., Oyama, Y., Suzuki, A. T., Hasegawa, M., Maesaka, H., Nakaya, T., Sasaki, T., Sato, H., Tanaka, H., Yamamoto, S., Yokoyama, M., Haines, T. J., Dazeley, S., Hatakeyama, S., Svoboda, R., Sullivan, G. W., Gran, R., Habig, A., Fukuda, Y., Itow, Y., Koike, T., Jung, C. K., Kato, T., Kobayashi, K., McGrew, C., Sarrat, A., Terri, R., Yanagisawa, C., Tamura, N., Ikeda, M., Sakuda, M., Kuno, Y., Yoshida, M., Kim, S. B., Yang, B. S., Ishizuka, T., Okazawa, H., Choi, Y., Seo, H. K., Gando, Y., Hasegawa, T., Inoue, K., Ishii, H., Nishijima, K., Ishino, H., Watanabe, Y., Koshiba, M., Totsuka, Y., Chen, S., Deng, Z., Liu, Y., Kielczewska, D., Berns, H. G., Shiraishi, K. K., Thrane, E., Washburn, K., and Wilkes, R. J.

Subjects
High Energy Physics - Experiment
Abstract

A search for neutron-antineutron ($n-\bar{n}$) oscillation was undertaken in Super-Kamiokande using the 1489 live-day or $2.45 \times 10^{34}$ neutron-year exposure data. This process violates both baryon and baryon minus lepton numbers by an absolute value of two units and is predicted by a large class of hypothetical models where the seesaw mechanism is incorporated to explain the observed tiny neutrino masses and the matter-antimatter asymmetry in the Universe. No evidence for $n-\bar{n}$ oscillation was found, the lower limit of the lifetime for neutrons bound in ${}^{16}$O, in an analysis that included all of the significant sources of experimental uncertainties, was determined to be $1.9 \times 10^{32}$~years at the 90\% confidence level. The corresponding lower limit for the oscillation time of free neutrons was calculated to be $2.7 \times 10^8$~s using a theoretical value of the nuclear suppression factor of $0.517 \times 10^{23}$~s$^{-1}$ and its uncertainty., Comment: 8 pages, 2 figures

Published
2011
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161. Study of Non-Standard Neutrino Interactions with Atmospheric Neutrino Data in Super-Kamiokande I and II

Author

Mitsuka, G., Abe, K., Hayato, Y., Iida, T., Ikeda, M., Kameda, J., Koshio, Y., Miura, M., Moriyama, S., Nakahata, M., Nakayama, S., Obayashi, Y., 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., Kaji, H., Kajita, T., Kaneyuki, K., Nishino, H., Okumura, K., Tanimoto, N., Dufour, F., Kearns, E., Litos, M., Raaf, J. L., Stone, J. L., Sulak, L. R., Goldhaber, M., Bays, K., Cravens, J. P., Kropp, W. R., Mine, S., Regis, C., Smy, M. B., Sobel, H. W., Vagins, M. R., Ganezer, K. S., Hill, J., Keig, W. E., Jang, J. S., Kim, J. Y., Lim, I. T., Albert, J., Scholberg, K., Walter, C. W., Wendell, R., Ishizuka, T., 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., Yanagisawa, C., Tamura, N., Idehara, Y., Sakuda, M., Kuno, Y., Yoshida, M., Kim, S. B., Yang, B. S., Okazawa, H., Choi, Y., Seo, H. K., Furuse, Y., Nishijima, K., Yokosawa, Y., Koshiba, M., Totsuka, Y., Chen, S., Liu, J., Heng, Y., Yang, Z., Zhang, H., Kielczewska, D., Connolly, K., Thrane, E., and Wilkes, R. J.

Subjects
High Energy Physics - Experiment
Abstract

In this paper we study non-standard neutrino interactions as an example of physics beyond the standard model using atmospheric neutrino data collected during the Super-Kamiokande I(1996-2001) and II(2003-2005) periods. We focus on flavor-changing-neutral-currents (FCNC), which allow neutrino flavor transitions via neutral current interactions, and effects which violate lepton non-universality (NU) and give rise to different neutral-current interaction-amplitudes for different neutrino flavors. We obtain a limit on the FCNC coupling parameter, varepsilon_{mu tau}, |varepsilon_{mu tau}|<1.1 x 10^{-2} at 90%C.L. and various constraints on other FCNC parameters as a function of the NU coupling, varepsilon_{e e}. We find no evidence of non-standard neutrino interactions in the Super-Kamiokande atmospheric data., Comment: 12 Pages, 14 figures. To be submitted to Phys. Rev. D

Published
2011
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162. Search for Differences in Oscillation Parameters for Atmospheric Neutrinos and Antineutrinos at Super-Kamiokande

Author

Collaboration, Super-Kamiokande, Abe, K., Hayato, Y., Iida, T., Ikeda, M., Iyogi, K., Kameda, J., Koshio, Y., Kozuma, Y., Miura, M., Moriyama, S., Nakahata, M., Nakayama, S., Obayashi, Y., Sekiya, H., Shiozawa, M., Suzuki, Y., Takeda, A., Takenaga, Y., Takeuchi, Y., Ueno, K., Ueshima, K., Watanabe, H., Yamada, S., Yokozawa, T., Ishihara, C., Kaji, H., Lee, K. P., Kajita, T., Kaneyuki, K., McLachlan, T., Okumura, K., Shimizu, Y., Tanimoto, N., Martens, K., Vagins, M. R., Labarga, L., Magro, L. M., Dufour, F., Kearns, E., Litos, M., Raaf, J. L., Stone, J. L., Sulak, L. R., Goldhaber, M., Bays, K., 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., Albert, J. B., Scholberg, K., Walter, C. W., Wendell, R., Wongjirad, T. M., Tasaka, S., Learned, J. G., Matsuno, S., Hasegawa, T., Ishida, T., Ishii, T., Kobayashi, T., Nakadaira, T., Nakamura, K., Nishikawa, K., Nishino, H., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Suzuki, A. T., Minamino, A., Nakaya, T., Fukuda, Y., Itow, Y., Mitsuka, G., Tanaka, T., Jung, C. K., Taylor, I., Yanagisawa, C., Ishino, H., Kibayashi, A., Mino, S., Mori, T., Sakuda, M., Toyota, H., Kuno, Y., Kim, S. B., Yang, B. S., Ishizuka, T., Okazawa, H., Choi, Y., Nishijima, K., Koshiba, M., Yokoyama, M., Totsuka, Y., Chen, S., Heng, Y., Yang, Z., Zhang, H., Kielczewska, D., Mijakowski, P., Connolly, K., Dziomba, M., and Wilkes, R. J.

Subjects
High Energy Physics - Experiment
Abstract

We present a search for differences in the oscillations of antineutrinos and neutrinos in the Super-Kamiokande -I, -II, and -III atmospheric neutrino sample. Under a two-flavor disappearance model with separate mixing parameters between neutrinos and antineutrinos, we find no evidence for a difference in oscillation parameters. Best fit antineutrino mixing is found to be at (dm2bar, sin2 2 thetabar) = (2.0x10^-3 eV^2, 1.0) and is consistent with the overall Super-K measurement., Comment: 6 pages, 4 figures. Figure updated

Published
2011
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163. An Indirect Search for WIMPs in the Sun using 3109.6 days of upward-going muons in Super-Kamiokande

Author

Collaboration, The Super-Kamiokande, Tanaka, T., Abe, K., Hayato, Y., Iida, T., Kameda, J., Koshio, Y., Kouzuma, Y., Miura, M., Moriyama, S., Nakahata, M., Nakayama, S., Obayashi, Y., Sekiya, H., Shiozawa, M., Suzuki, Y., Takeda, A., Takenaga, Y., Ueno, K., Ueshima, K., Yamada, S., Yokozawa, T., Ishihara, C., Hazama, S., Kaji, H., Kajita, T., Kaneyuki, K., McLachlan, T., Okumura, K., Shimizu, Y., Tanimoto, N., Dufour, F., Kearns, E., Litos3, M., Raaf, J. L., Stone, J. L., Sulak, L. R., Cravens, J. P., Bays, K., 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., Albert, J. B., Scholberg, K., Walter, C. W., Wendell, R., Wongjirad, T., Ishizuka, T., Tasaka, S., Learned, J. G., Matsuno, S., Smith, S., Martens, K., Vagins, M., Watanabe, Y., Hasegawa, T., Ishida, T., Ishii, T., Kobayashi, T., Nakadaira, T., Nakamura, K., Nishikawa, K., Nishino, H., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Suzuki, A. T., Takeuchi, Y., Ikeda, M., Minamino, A., Nakaya, T., Labarga, L., Fukuda, Y., Itow, Y., Mitsuka, G., Jung, C. K., McGrew, C., Lopez, G., Yanagisawa, C., Tamura, N., Ishino, H., Kibayashi, A., Sakuda, M., Kuno, Y., Yoshida, M., Kim, S. B., Yang, B. S., Okazawa, H., Choi, Y., Nishijima, K., Yokosawa, Y., Koshiba, M., Totsuka, Y., Yokoyama, M., Chen, S., Heng, Y., Yang, Z., Zhang, H., Kielczewska, D., Mijakowski, P., Connolly, K., Dziomba, M., Thrane, E., and Wilkes, R. J.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract

We present the result of an indirect search for high energy neutrinos from WIMP annihilation in the Sun using upward-going muon (upmu) events at Super-Kamiokande. Datasets from SKI-SKIII (3109.6 days) were used for the analysis. We looked for an excess of neutrino signal from the Sun as compared with the expected atmospheric neutrino background in three upmu categories: stopping, non-showering, and showering. No significant excess was observed. The 90% C.L. upper limits of upward-going muon flux induced by WIMPs of 100 GeV/c$^2$ were 6.4$\times10^{-15}$ cm$^{-2}$ sec$^{-1}$ and 4.0$\times10^{-15}$ cm$^{-2}$ sec$^{-1}$ for the soft and hard annihilation channels, respectively. These limits correspond to upper limits of 4.5$\times10^{-39}$ cm$^{-2}$ and 2.7$\times10^{-40}$ cm$^{-2}$ for spin-dependent WIMP-nucleon scattering cross sections in the soft and hard annihilation channels, respectively., Comment: Add journal reference. Also fixed typo and cosmetic things in the old draft

Published
2011
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164. Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam

Author

T2K Collaboration, Abe, K., Abgrall, N., Ajima, Y., Aihara, H., Albert, J. B., Andreopoulos, C., Andrieu, B., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Badertscher, A., Barbi, M., Barker, G. J., Barr, G., Bass, M., Bay, F., Bentham, S., Berardi, V., Berger, B. E., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bouchez, J., Boyd, S. B., Bravar, A., Bronner, C., Brook-Roberge, D. G., Buchanan, N., Budd, H., Calvet, D., Cartwright, S. L., Carver, A., Castillo, R., Catanesi, M. G., 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, G. S., Davis, S., Day, M., DeRosa, G., de Andre, J. P. A. M., dePerio, P., Delbart, A., Densham, C., DiLodovico, F., DiLuise, S., Tran, P. Dinh, Dobson, J., Dore, U., Drapier, O., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escudero, L., Esposito, L. S., Fechner, M., Ferrero, A., Finch, A. J., Frank, E., Fujii, Y., Fukuda, Y., Galymov, V., Gannaway, F. C., Gaudin, A., Gendotti, A., George, M., Giffin, S., Giganti, C., Gilje, K., Golan, T., Goldhaber, M., Gomez-Cadenas, J. J., Gonin, M., Grant, N., Grant, A., Gumplinger, P., Guzowski, P., Haesler, A., Haigh, M. D., Hamano, K., Hansen, C., Hansen, D., Hara, T., Harrison, P. F., Hartfiel, B., Hartz, M., Haruyama, T., Hasegawa, T., Hastings, N. C., Hastings, S., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Hearty, C., Helmer, R. L., Henderson, R., Higashi, N., Hignight, J., Hirose, E., Holeczek, J., Horikawa, S., Hyndman, A., Ichikawa, A. K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S. J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R. A., Joo, K. K., Jover-Manas, G. V., Jung, C. K., 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, J. Y., Kim, S. B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Koike, S., Konaka, A., Kormos, L. L., 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, K. P., Le, P. T., Levy, J. M., Licciardi, C., Lim, I. T., Lindner, T., Litchfield, R. P., Litos, M., Longhin, A., Lopez, G. D., Loverre, P. F., Ludovici, L., Lux, T., Macaire, M., Mahn, K., Makida, Y., Malek, M., Manly, S., Marchionni, A., Marino, A. D., Marteau, J., Martin, J. F., Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E. L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Messina, M., Metcalf, W., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A. D., 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, M. L., Nelson, B., Nicholls, T. C., Nishikawa, K., Nishino, H., Nowak, J. A., Noy, M., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Ozaki, T., Pac, M. Y., Palladino, V., Paolone, V., Paul, P., Payne, D., Pearce, G. F., Perkin, J. D., Pettinacci, V., Pierre, F., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Qian, W., Raaf, J. L., Radicioni, E., Ratoff, P. N., Raufer, T. M., Ravonel, M., Raymond, M., Retiere, F., Robert, A., Rodrigues, P. A., Rondio, E., Roney, J. M., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sabouri, S., Sacco, R., Sakashita, K., Sanchez, F., Sarrat, A., Sasaki, K., Scholberg, K., Schwehr, J., Scott, M., Scully, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Syiad, M., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Stahl, A., Stamoulis, P., Steinmann, J., Still, B., Stone, J., Strabel, C., Sulak, L. R., Sulej, R., Sutcliffe, P., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, K., Tanaka, H. A., Tanaka, M., Tanaka, M. M., Tanimoto, N., Tashiro, K., Taylor, I., Terashima, A., Terhorst, D., Terri, R., Thompson, L. F., 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, J. J., Waldron, A. V., Walter, C. W., Wanderer, P. J., Wang, J., Ward, M. A., Ward, G. P., Wark, D., Wascko, M. O., Weber, A., Wendell, R., West, N., Whitehead, L. H., Wikstrom, G., Wilkes, R. J., Wilking, M. J., Wilson, J. R., Wilson, R. J., 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, E. D., Zito, M., and Zmuda, J.

Subjects
High Energy Physics - Experiment
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)$<\sin^2 2\theta_{13}<$ 0.28(0.34) for $\delta_{\rm CP}=0$ and a normal (inverted) hierarchy., Comment: 20 pages, 6 figures, version published in PRL

Published
2011
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165. The T2K Experiment

Author

T2K Collaboration, Abe, K., Abgrall, N., Aihara, H., Ajima, Y., Albert, J. B., Allan, D., Amaudruz, P. -A., Andreopoulos, C., Andrieu, B., Anerella, M. D., Angelsen, C., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., de André, J. P. A. M., Autiero, D., Badertscher, A., Ballester, O., Barbi, M., Barker, G. J., Baron, P., Barr, G., Bartoszek, L., Batkiewicz, M., Bay, F., Bentham, S., Berardi, V., Berger, B. E., Berns, H., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Birney, P., Bishop, D., Blackmore, E., Blaszczyk, F. d. M., Blocki, J., Blondel, A., Bodek, A., Bojechko, C., Bouchez, J., Boussuge, T., Boyd, S. B., Boyer, M., Braam, N., Bradford, R., Bravar, A., Briggs, K., Brinson, J. D., Bronner, C., Brook-Roberge, D. G., Bryant, M., Buchanan, N., Budd, H., Cadabeschi, M., Calland, R. G., Calvet, D., Rodríguez, J. Caravaca, Carroll, J., Cartwright, S. L., Carver, A., Castillo, R., Catanesi, M. G., Cavata, C., Cazes, A., Cervera, A., Charrier, J. P., Chavez, C., Choi, S., Chollet, S., Christodoulou, G., Colas, P., Coleman, J., Coleman, W., Collazuol, G., Connolly, K., Cooke, P., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davies, G. S., Davis, S., Day, M., De La Broise, X., de Perio, P., De Rosa, G., Dealtry, T., Debraine, A., Delagnes, E., Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Tran, P. Dinh, Dobson, J., Doornbos, J., Dore, U., Drapier, O., Druillole, F., Dufour, F., Dumarchez, J., Durkin, T., Dytman, S., Dziewiecki, M., Dziomba, M., Ellison, B., Emery, S., Ereditato, A., Escallier, J. E., Escudero, L., Esposito, L. S., Faszer, W., Fechner, M., Ferrero, A., Finch, A., Fisher, C., Fitton, M., Flight, R., Forbush, D., Frank, E., Fransham, K., Fujii, Y., Fukuda, Y., Gallop, M., Galymov, V., Ganetis, G. L., Gannaway, F. C., Gaudin, A., Gaweda, J., Gendotti, A., George, M., Giffin, S., Giganti, C., Gilje, K., Giomataris, I., Giraud, J., Ghosh, A. K., Golan, T., Goldhaber, M., Gomez-Cadenas, J. J., Gomi, S., Gonin, M., Goyette, M., Grant, A., Grant, N., Grañena, F., Greenwood, S., Gumplinger, P., Guzowski, P., Haigh, M. D., Hamano, K., Hansen, C., Hara, T., Harrison, P. F., Hartfiel, B., Hartz, M., Haruyama, T., Hasanen, R., Hasegawa, T., Hastings, N. C., Hastings, S., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Haycock, T. D. J., Hearty, C., Helmer, R. L., Henderson, R., Herlant, S., Higashi, N., Hignight, J., Hiraide, K., Hirose, E., Holeczek, J., Honkanen, N., Horikawa, S., Hyndman, A., Ichikawa, A. K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S. J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R. A., Joo, K. K., Jover-Manas, G., Jung, C. K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kaneyuki, K., Karlen, D., Kasami, K., Kasey, V., Kato, I., Kawamuko, H., Kearns, E., Kellet, L., Khabibullin, M., Khaleeq, M., Khan, N., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, J. Y., Kim, S. -B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Koike, S., Komorowski, T., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kouzuma, Y., Kowalik, K., Kravtsov, V., Kreslo, I., Kropp, W., Kubo, H., Kubota, J., Kudenko, Y., Kulkarni, N., Kurchaninov, L., Kurimoto, Y., Kurjata, R., Kurosawa, Y., Kutter, T., Lagoda, J., Laihem, K., Langstaff, R., Laveder, M., Lawson, T. B., Le, P. T., Coguie, A. Le, Ross, M. Le, Lee, K. P., Lenckowski, M., Licciardi, C., Lim, I. T., Lindner, T., Litchfield, R. P., Longhin, A., Lopez, G. D., Lu, P., Ludovici, L., Lux, T., Macaire, M., Magaletti, L., Mahn, K., Makida, Y., Malafis, C. J., Malek, M., Manly, S., Marchionni, A., Mark, C., Marino, A. D., Marone, A. J., Marteau, J., Martin, J. F., Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E. L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Mercer, I., Messina, M., Metcalf, W., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Minvielle, R. E., Mituka, G., Miura, M., Mizouchi, K., Mols, J. -P., Monfregola, L., Monmarthe, E., Moreau, F., Morgan, B., Moriyama, S., Morris, D., Muir, A., Murakami, A., Muratore, J. F., Murdoch, M., Murphy, S., Myslik, J., Nagashima, G., Nakadaira, T., Nakahata, M., Nakamoto, T., Nakamura, K., Nakayama, S., Nakaya, T., Naples, D., Nelson, B., Nicholls, T. C., Nishikawa, K., Nishino, H., Nitta, K., Nizery, F., Nowak, J. A., Noy, M., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Ohlmann, C., Olchanski, K., Openshaw, R., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Ozaki, T., Pac, M. Y., Palladino, V., Paolone, V., Paul, P., Payne, D., Pearce, G. F., Pearson, C., Perkin, J. D., Pfleger, M., Pierre, F., Pierrepont, D., Plonski, P., Poffenberger, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Preece, R., Przewlocki, P., Qian, W., Raaf, J. L., Radicioni, E., Ramos, K., Ratoff, P., Raufer, T. M., Ravonel, M., Raymond, M., Retiere, F., Richards, D., Ritou, J. -L., Robert, A., Rodrigues, P. A., Rondio, E., Roney, M., Rooney, M., Ross, D., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sadler, S., Sakashita, K., Sanchez, F., Sarrat, A., Sasaki, K., Schaack, P., Schmidt, J., Scholberg, K., Schwehr, J., Scott, M., Scully, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Sheffer, G., Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Siyad, M., Smith, D., Smith, R. J., Smy, M., Sobczyk, J., Sobel, H., Sooriyakumaran, S., Sorel, M., Spitz, J., Stahl, A., Stamoulis, P., Star, O., Statter, J., Stawnyczy, L., Steinmann, J., Steffens, J., Still, B., Stodulski, M., Stone, J., Strabel, C., Strauss, T., Sulej, R., Sutcliffe, P., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S. Y., Suzuki, Y., Swierblewski, J., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Tadepalli, A. S., Taguchi, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, H. A., Tanaka, K., Tanaka, M., Tanaka, M. M., Tanimoto, N., Tashiro, K., Taylor, I. J., Terashima, A., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Thorpe, M., Toki, W., Tomaru, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tvaskis, V., Tzanov, M., Uchida, Y., Ueno, K., Usseglio, M., Vacheret, A., Vagins, M., Van Schalkwyk, J. F., Vanel, J. -C., Vasseur, G., Veledar, O., Vincent, P., Wachala, T., Waldron, A. V., Walter, C. W., Wanderer, P. J., Ward, M. A., Ward, G. P., Wark, D., Warner, D., Wascko, M. O., Weber, A., Wendell, R., Wendland, J., West, N., Whitehead, L. H., Wikström, G., Wilkes, R. J., Wilking, M. J., Williamson, Z., Wilson, J. R., Wilson, R. J., Wong, K., 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., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The T2K experiment is a long-baseline neutrino oscillation experiment. Its main goal is to measure the last unknown lepton sector mixing angle {\theta}_{13} by observing {\nu}_e appearance in a {\nu}_{\mu} beam. It also aims to make a precision measurement of the known oscillation parameters, {\Delta}m^{2}_{23} and sin^{2} 2{\theta}_{23}, via {\nu}_{\mu} disappearance studies. Other goals of the experiment include various neutrino cross section measurements and sterile neutrino searches. The experiment uses an intense proton beam generated by the J-PARC accelerator in Tokai, Japan, and is composed of a neutrino beamline, a near detector complex (ND280), and a far detector (Super-Kamiokande) located 295 km away from J-PARC. This paper provides a comprehensive review of the instrumentation aspect of the T2K experiment and a summary of the vital information for each subsystem., Comment: 33 pages, 32 figures, Submitted and accepted by NIM A. Editor: Prof. Chang Kee Jung, Department of Physics and Astronomy, SUNY Stony Brook, chang.jung@sunysb.edu, 631-632-8108 Submit Edited to remove line numbers

Published
2011
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166. Solar neutrino results in Super-Kamiokande-III

Author

Abe, K., Hayato, Y., Iida, T., Ikeda, M., Ishihara, C., Iyogi, K., Kameda, J., Kobayashi, K., Koshio, Y., Kozuma, Y., Miura, M., Moriyama, S., Nakahata, M., Nakayama, S., Obayashi, Y., Ogawa, H., Sekiya, H., Shiozawa, M., Suzuki, Y., Takeda, A., Takenaga, Y., Ueno, K., Ueshima, K., Watanabe, H., Yamada, S., Yokozawa, T., Hazama, S., Kaji, H., Kajita, T., Kaneyuki, K., McLachlan, T., Okumura, K., Shimizu, Y., Tanimoto, N., Vagins, M. R., Labarga, L., Magro, L. M, Dufour, F., Kearns, E., Litos, M., Raaf, J. L., Stone, J. L., Sulak, L. R., Wang, W., Goldhaber, M., Bays, K., Casper, D., Cravens, J. P., Kropp, W. R., Mine, S., Regis, C., Renshaw, A., Smy, M. B., Sobel, H. W., Ganezer, K. S., Hill, J., Keig, W. E., Jang, J. S., Kim, J. Y., Lim, I. T., Albert, J., Wendell, R., Wongjirad, T., Scholberg, K., Walter, C. W., Ishizuka, T., Tasaka, S., Learned, J. G., Matsuno, S., Watanabe, Y., Hasegawa, T., Ishida, T., Ishii, T., Kobayashi, T., Nakadaira, T., Nakamura, K., Nishikawa, K., Nishino, H., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Suzuki, A. T., Takeuchi, Y., Minamino, A., Nakaya, T., Fukuda, Y., Itow, Y., Mitsuka, G., Tanaka, T., Jung, C. K., Lopez, G., McGrew, C., Terri, R., Yanagisawa, C., Tamura, N., Ishino, H., Kibayashi, A., Mino, S., Mori, T., Sakuda, M., Toyota, H., Kuno, Y., Yoshida, M., Kim, S. B., Yang, B. S., Okazawa, H., Choi, Y., Nishijima, K., Yokosawa, Y., Koshiba, M., Totsuka, Y., Yokoyama, M., Chen, S., Heng, Y., Yang, Z., Zhang, H., Kielczewska, D., Mijakowski, P., Connolly, K., Dziomba, M., Thrane, E., and Wilkes, R. J.

Subjects
High Energy Physics - Experiment
Abstract

The results of the third phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first and second phase results. With improved detector calibrations, a full detector simulation, and improved analysis methods, the systematic uncertainty on the total neutrino flux is estimated to be ?2.1%, which is about two thirds of the systematic uncertainty for the first phase of Super-Kamiokande. The observed 8B solar flux in the 5.0 to 20 MeV total electron energy region is 2.32+/-0.04 (stat.)+/-0.05 (sys.) *10^6 cm^-2sec^-1, in agreement with previous measurements. A combined oscillation analysis is carried out using SK-I, II, and III data, and the results are also combined with the results of other solar neutrino experiments. The best-fit oscillation parameters are obtained to be sin^2 {\theta}12 = 0.30+0.02-0.01(tan^2 {\theta}12 = 0.42+0.04 -0.02) and {\Delta}m2_21 = 6.2+1.1-1.9 *10^-5eV^2. Combined with KamLAND results, the best-fit oscillation parameters are found to be sin^2 {\theta}12 = 0.31+/-0.01(tan^2 {\theta}12 = 0.44+/-0.03) and {\Delta}m2_21 = 7.6?0.2*10^-5eV^2 . The 8B neutrino flux obtained from global solar neutrino experiments is 5.3+/-0.2(stat.+sys.)*10^6cm^-2s^-1, while the 8B flux becomes 5.1+/-0.1(stat.+sys.)*10^6cm^-2s^-1 by adding KamLAND result. In a three-flavor analysis combining all solar neutrino experiments, the upper limit of sin^2 {\theta}13 is 0.060 at 95% C.L.. After combination with KamLAND results, the upper limit of sin^2 {\theta}13 is found to be 0.059 at 95% C.L.., Comment: 19 pages, 33 figures in the main text. The appendix section on errata is added in v3

Published
2010
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167. Atmospheric neutrino oscillation analysis with sub-leading effects in Super-Kamiokande I, II, and III

Author

Collaboration, Super-Kamiokande, Wendell, R., Ishihara, C., Abe, K., Hayato, Y., Iida, T., Ikeda, M., Iyogi, K., Kameda, J., Kobayashi, K., Koshio, Y., Kozuma, 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., Yokozawa, T., Hazama, S., Kaji, H., Kajita, T., Kaneyuki, K., McLachlan, T., Okumura, K., Shimizu, Y., Tanimoto, N., Vagins, M. R., Dufour, F., Kearns, E., Litos, M., Raaf, J. L., Stone, J. L., Sulak, L. R., Wang, W., Goldhaber, M., Bays, 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., Albert, J., Fechner, M., Scholberg, K., Walter, C. W., Tasaka, S., Learned, J. G., Matsuno, S., Watanabe, Y., Hasegawa, T., Ishida, T., Ishii, T., Kobayashi, T., Nakadaira, T., Nakamura, K., Nishikawa, K., Nishino, H., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Suzuki, A. T., Minamino, A., Nakaya, T., Fukuda, Y., Itow, Y., Mitsuka, G., Tanaka, T., Jung, C. K., Lopez, G., McGrew, C., Yanagisawa, C., Tamura, N., Ishino, H., Kibayashi, A., Mino, S., Mori, T., Sakuda, M., Toyota, H., Kuno, Y., Yoshida, M., Kim, S. B., Yang, B. S., Ishizuka, T., Okazawa, H., Choi, Y., Nishijima, K., Yokosawa, Y., Koshiba, M., Yokoyama, M., Totsuka, Y., Chen, S., Heng, Y., Yang, Z., Zhang, H., Kielczewska, D., Mijakowski, P., Connolly, K., Dziomba, M., Thrane, E., and Wilkes, R. J.

Subjects
High Energy Physics - Experiment
Abstract

We present a search for non-zero theta_{13} and deviations of sin^2 theta_{23} from 0.5 in the oscillations of atmospheric neutrino data from Super-Kamiokande -I, -II, and -III. No distortions of the neutrino flux consistent with non-zero theta_{13} are found and both neutrino mass hierarchy hypotheses are in agreement with the data. The data are best fit at Delta m^2 = 2.1 x 10^-3 eV^2, sin^2 theta_{13} = 0.0, and sin^2 theta_{23} =0.5. In the normal (inverted) hierarchy theta_{13} and Delta m^2 are constrained at the one-dimensional 90% C.L. to sin^2 theta_{13} < 0.04 (0.09) and 1.9 (1.7) x 10^-3 < Delta m^2 < 2.6 (2.7) x 10^-3 eV^2. The atmospheric mixing angle is within 0.407 <= sin^2 theta_{23} <= 0.583 at 90% C.L., Comment: 17 Pages, 14 figures. To be submitted to Phys. Rev. D Minor update to text after referee comments. Figures modified for better grayscale printing.

Published
2010
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168. Polarization transfer measurements for $^{12}{\rm C}(\vec{p},\vec{n})^{12}{\rm N (g.s.},1^+)$ at 296 MeV and nuclear correlation effects

Author

Dozono, M., Wakasa, T., Ihara, E., Asaji, S., Fujita, K., Hatanake, K., Ichimura, M., Ishida, T., Kaneda, T., Matsubara, H., Nagasue, Y., Noro, T., Sakemi, Y., Shimizu, Y., Takeda, H., Tameshige, Y., Tamii, A., and Yamada, Y.

Subjects
Nuclear Experiment
Abstract

Differential cross sections and complete sets of polarization observables are presented for the Gamow-Teller $^{12}{\rm C}(\vec{p},\vec{n})^{12}{\rm N}({\rm g.s.},1^+)$ reaction at a bombarding energy of 296 MeV with momentum transfers $q$ of 0.1 to $2.2{\rm fm}^{-1}$. The polarization transfer observables are used to deduce the spin-longitudinal cross section, $ID_q$, and spin-transverse cross sections, $ID_p$ and $ID_n$. The data are compared with calculations based on the distorted wave impulse approximation (DWIA) using shell-model wave functions. Significant differences between the experimental and theoretical results are observed for all three spin-dependent $ID_i$ at momentum transfers of $q \gtrsim 0.5{\rm fm}^{-1}$, suggesting the existence of nuclear correlations beyond the shell model. We also performed DWIA calculations employing random phase approximation (RPA) response functions and found that the observed discrepancy is partly resolved by the pionic and rho-mesonic correlation effects., Comment: accepted for publication in Phys. Rev. C

Published
2009
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170. Systematic characterization of upper critical fields for MgB$_2$ thin films using the two-band superconducting theory

Author

Noguchi, S., Kuribayashi, A., Ishida, T., Oba, T., Iriuda, H., Yoshizawa, M., Harada, Y., Miki, S., Shimakage, H., Wang, Z., Satoh, K., and Yotsuya, T.

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
Abstract

We present experimental results of the upper critical fields $H_{\rm c2}$ of various MgB$_2$ thin films prepared by the molecular beam epitaxy, multiple-targets sputtering, and co-evaporation deposition apparatus. Experimental data of the $H_{\rm c2}(T)$ are successfully analyzed by applying the Gurevich theory of dirty two-band superconductivity in the case of $D_{\pi}/D_{\sigma}>1$, where $D_{\pi}$ and $D_{\sigma}$ are the intraband electron diffusivities for $\pi$ and $\sigma$ bands, respectively. We find that the parameters obtained from the analysis are strongly correlated to the superconducting transition temperature $T_{\rm c}$ of the films. We also discuss the anormalous narrowing of the transition width at intermediate temperatures confirmed by the magnetoresistance measurements., Comment: 7 pages, 7 figures, submitted to Phys. Rev. B

Published
2008
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171. Coexistence of Antiferromagnetism and Superconductivity in PrFeAsO$_{1-\delta}$

Author

Kubota, D., Ishida, T., Ishikado, M., Shamoto, S., Eisaki, H., Kito, H., and Iyo, A.

Subjects
Condensed Matter - Superconductivity
Abstract

A high-quality PrFeAsO$_{1-\delta}$ single crystal ($T_{\rm c}=44$ K) has been investigated by the magnetic torque. Antiferromagnetism of the Pr$^{3+}$ ions was found to coexist with superconductivity in PrFeAsO$_{1-\delta}$ at temperatures below $T_\mathrm{N}=14$ K. We predict a magnetic structure that is not in accordance with earlier neutron studies performed using polycrystalline nonsuperconducting specimens. As the temperature decreases, the superconducting anisotropy $\gamma\sim 4$ of PrFeAsO$_{1-\delta}$ increases near $T_c$ and tends to decrease slightly at lower temperatures.

Published
2008

172. Differential cross section and analyzing power of the ${\vec p}p{\to}pp{\pi}^0$ reaction at a beam energy of 390 MeV

Author

Maeda, Y., Segawa, M., Ishida, T., Kacharava, A., Nomachi, M., Shimbara, Y., Sugaya, Y., Tamura, K., Yagita, T., Yasuda, K., Yoshida, H. P., and Wilkin, C.

Subjects
Nuclear Experiment
Abstract

The differential cross section and analyzing power $A_y$ of the ${\vec p}p{\to}pp{\pi}^0$ reaction have been measured at RCNP in coplanar geometry at a beam energy of 390 MeV and the dependence on both the pion emission angle and the relative momentum of the final protons have been extracted. The angular variation of Ay for the large values of the relative momentum studied here shows that this is primarily an effect of the interference of pion s- and p-waves and this interference can also explain the momentum dependence. Within the framework of a very simple model, these results would suggest that the pion-production operator has a significant long-range component., Comment: 12 pages, 11 figures, 3 tables, submitted to Physical Review C

Published
2008
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173. Proton elastic scattering from tin isotopes at 295 MeV and systematic change of neutron density distributions

Author

Terashima, S., Sakaguchi, H., Takeda, H., Ishikawa, T., Itoh, M., Kawabata, T., Murakami, T., Uchida, M., Yasuda, Y., Yosoi, M., Zenihiro, J., Yoshida, H. P., Noro, T., Ishida, T., Asaji, S., and Yonemura, T.

Subjects
Nuclear Experiment
Abstract

Cross sections and analyzing powers for proton elastic scattering from $^{116,118,120,122,124}$Sn at 295 MeV have been measured for a momentum transfer of up to about 3.5 fm$^{-1}$ to deduce systematic changes of the neutron density distribution. We tuned the relativistic Love-Franey interaction to explain the proton elastic scattering of a nucleus whose density distribution is well known. Then, we applied this interaction to deduce the neutron density distributions of tin isotopes. The result of our analysis shows the clear systematic behavior of a gradual increase in the neutron skin thickness of tin isotopes with mass number., Comment: 24 pages, 12 figures. Accepted for publication in Physical Review C

Published
2008
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182. Study of nuclear correlation effects via 12C(p,n)12N(g.s.,1+) at 296 MeV

Author

Wakasa, T., Dozono, M., Ihara, E., Asaji, S., Fujita, K., Hatanaka, K., Ichimura, M., Ishida, T., Kaneda, T., Matsubara, H., Nagasue, Y., Noro, T., Sakemi, Y., Shimizu, Y., Takeda, H., Tameshige, Y., Tamii, A., and Yamada, Y.

Subjects
Nuclear Experiment
Abstract

We report measurements of the cross section and a complete set of polarization observables for the Gamow--Teller ${}^{12}{\rm C}(\vec{p},\vec{n}){}^{12}{\rm N}({\rm g.s.},1^+)$ reaction at a bombarding energy of 296 MeV. The data are compared with distorted wave impulse approximation calculations employing transition form factors normalized to reproduce the observed beta-decay $ft$ value. The cross section is significantly under-predicted by the calculations at momentum transfers $q \gtrsim $ 0.5 ${\rm fm^{-1}}$. The discrepancy is partly resolved by considering the non-locality of the nuclear mean field. However, the calculations still under-predict the cross section at large momentum transfers of $q$ $\simeq$ 1.6 ${\rm fm^{-1}}$. We also performed calculations employing random phase approximation response functions and found that the observed enhancement can be attributed in part to pionic correlations in nuclei., Comment: 5 figures, submitted to Phys. Lett. B

Published
2007
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183. Complete Set of Polarization Transfer Observables for the $^{12}{\rm C}(p,n)$ Reaction at 296 MeV and 0$^{\circ}$

Author

Dozono, M., Wakasa, T., Ihara, E., Asaji, S., Fujita, K., Hatanaka, K., Ishida, T., Kaneda, T., Matsubara, H., Nagasue, Y., Noro, T., Sakemi, Y., Shimizu, Y., Takeda, H., Tameshige, Y., Tamii, A., and Yamada, Y.

Subjects
Nuclear Experiment
Abstract

A complete set of polarization transfer observables has been measured for the $^{12}{\rm C}(p,n)$ reaction at $T_p=296 {\rm MeV}$ and $\theta_{\rm lab}=0^{\circ}$. The total spin transfer $\Sigma(0^{\circ})$ and the observable $f_1$ deduced from the measured polarization transfer observables indicate that the spin--dipole resonance at $E_x \simeq 7 {\rm MeV}$ has greater $2^-$ strength than $1^-$ strength, which is consistent with recent experimental and theoretical studies. The results also indicate a predominance of the spin-flip and unnatural-parity transition strength in the continuum. The exchange tensor interaction at a large momentum transfer of $Q \simeq 3.6 {\rm fm}^{-1}$ is discussed., Comment: 4 pages, 4 figures

Published
2007
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184. Characterization of a Nano-scale γ′ Phase in HPT-Disk P/M Superalloy HGN300 by Small-Angle X-Ray Scattering

Author

Ohnuma, M., Yoshioka, T., Ishida, T., Nishimura, J., Sato, M., Nagahama, D., Okuno, M., Ott, Eric, editor, Liu, Xingbo, editor, Andersson, Joel, editor, Bi, Zhongnan, editor, Bockenstedt, Kevin, editor, Dempster, Ian, editor, Groh, Jon, editor, Heck, Karl, editor, Jablonski, Paul, editor, Kaplan, Max, editor, Nagahama, Daisuke, editor, and Sudbrack, Chantal, editor

Published
2018
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185. Vortex motion in chilarity-controlled pair of magnetic disks

Author

Masaki, H., Ishida, T., Antos, R., Shibata, J., Kimura, T., and Otani, Y.

Subjects
Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

We investigate the influence of the vortex chirality on the magnetization processes of a magnetostatically coupled pair of magnetic disks. The magnetic vortices with opposite chiralities are realized by introducing asymmetry into the disks. The motion of the paired vortices are studied by measuring the magnetoresistance with lock-in resistance bridge technique. The vortex annihilation process is found to depend on the moving directions of the magnetic vorticies. The experimental results are well reproduced by the micromagnetic simulation., Comment: 10 pages, 4 figures

Published
2006

186. Relativistic predictions of polarization phenomena in exclusive proton-induced proton-knockout reactions

Author

Hillhouse, G. C., Ishida, T., Noro, T., and van der Ventel, B. I. S.

Subjects
Nuclear Theory
Abstract

Whereas a nonrelativistic distorted wave model fails to quantitatively describe analyzing power data for exclusive proton-induced proton-knockout from the 3s_{1/2} state in Pb-208 at 202 MeV, the corresponding relativistic prediction provides a perfect description, thus suggesting that the Dirac equation is the more appropriate underlying dynamical equation. We check the consistency of this rsult by comparing predictions for both dynamical models to new high resolution data for 3s_{1/2} knockout in Pb-208 at a higher incident energy of 392 MeV., Comment: Talk presented at the 11th International Conference on Nuclear Reaction Mechanisms, Varenna (Italy), Villa Monastero, June 12 - 16, 2006

Published
2006

187. Current-induced vortex displacement and annihilation in a single Permalloy disk

Author

Ishida, T., Kimura, T., and Otani, Y.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
Abstract

The induced motion of a magnetic vortex in a micron-sized ferromagnetic disk due to the DC current injection is studied by measuring planar Hall effect. The DC current injection is found to induce the spin torque that sweeps the vortex out of the disk at the critical current while bias magnetic field are applied. The current-induced vortex core displacement deduced from the change in planar Hall resistance is quantitatively consistent with theoretical prediction. Peak structures similar to those originated from spin wave excitations are observed in the differential planar Hall resistance curve., Comment: 12 pages, 4 figures

Published
2005
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188. Performance of the neutron polarimeter NPOL3 for high resolution measurements

Author

Wakasa, T., Hagihara, Y., Sasano, M., Asaji, S., Fujita, K., Hatanaka, K., Ishida, T., Kawabata, T., Kuboki, H., Maeda, Y., Noro, T., Saito, T., Sakai, H., Sakemi, Y., Sekiguchi, K., Shimizu, Y., Tamii, A., Tameshige, Y., and Yako, K.

Subjects
Nuclear Experiment
Abstract

We describe the neutron polarimeter NPOL3 for the measurement of polarization transfer observables $D_{ij}$ with a typical high resolution of $\sim$300 keV at $T_n$ $\simeq$ 200 MeV. The NPOL3 system consists of three planes of neutron detectors. The first two planes for neutron polarization analysis are made of 20 sets of one-dimensional position-sensitive plastic scintillation counters with a size of 100 cm $\times$ 10 cm $\times$ 5 cm, and they cover the area of 100 $\times$ 100 $\mathrm{cm}^2$. The last plane for detecting doubly scattered neutrons or recoiled protons is made of the two-dimensional position-sensitive liquid scintillation counter with a size of 100 cm $\times$ 100 cm $\times$ 10 cm. The effective analyzing powers $A_{y;\mathrm{eff}}$ and double scattering efficiencies $\epsilon_{\mathrm{D.S.}}$ were measured by using the three kinds of polarized neutrons from the ${}^{2}{\rm H}(\vec{p},\vec{n})pp$, ${}^{6}{\rm Li}(\vec{p},\vec{n}){}^{6}{\rm Be}(\mathrm{g.s.})$, and ${}^{12}{\rm C}(\vec{p},\vec{n}){}^{12}{\rm N}(\mathrm{g.s.})$ reactions at $T_p$ = 198 MeV. The performance of NPOL3 defined as $\epsilon_{\mathrm{D.S.}}(A_{y;\mathrm{eff}})^2$ are similar to that of the Indiana Neutron POLarimeter (INPOL) by taking into account for the counter configuration difference between these two neutron polarimeters., Comment: 28 pages, 18 figures, submitted to Nucl. Instrum. Methods Phys. Res. A

Published
2005
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190. Search for Dark Matter WIMPs using Upward Through-going Muons in Super-Kamiokande

Author

Collaboration, Super-Kamiokande, Desai, S., Ashie, Y., Fukuda, S., Fukuda, Y., Ishihara, K., Itow, Y., Koshio, Y., Minamino, A., Miura, M., Moriyama, S., Nakahata, M., Namba, T., Nambu, R., Obayashi, Y., Sakurai, N., Shiozawa, M., Suzuki, Y., Takeuchi, H., Takeuchi, Y., Yamada, S., Ishitsuka, M., Kajita, T., Kaneyuki, K., Nakayama, S., Okada, A., Ooyabu, T., Saji, C., Earl, M., Kearns, E., Stone, J. L., Sulak, L. R., Walter, C. W., Wang, W., Goldhaber, M., Barszczak, T., Casper, D., Cravens, J. P., Gajewski, W., Kropp, W. R., Mine, S., Liu, D. W., Smy, M. B., Sobel, H. W., Sterner, C. W., Vagins, M. R., Ganezer, K. S., Hill, J., Keig, W. E., Kim, J. Y., Lim, I. T., Ellsworth, R. W., Tasaka, S., Guillian, G., Kibayashi, A., Learned, J. G., Matsuno, S., Takemori, D., Messier, M. D., Hayato, Y., Ichikawa, A. K., Ishida, T., Ishii, T., Iwashita, T., Kameda, J., Kobayashi, T., Maruyama, T., Nakamura, K., Nitta, K., Oyama, Y., Sakuda, M., Totsuka, Y., Suzuki, A. T., Hasegawa, M., Hayashi, K., Inagaki, T., Kato, I., Maesaka, H., Morita, T., Nakaya, T., Nishikawa, K., Sasaki, T., Ueda, S., Yamamoto, S., Haines, T. J., Dazeley, S., Hatakeyama, S., Svoboda, R., Blaufuss, E., Goodman, J. A., Sullivan, G. W., Turcan, D., Scholberg, K., Habig, A., Jung, C. K., Kato, T., Kobayashi, K., Malek, M., Mauger, C., McGrew, C., Sarrat, A., Sharkey, E., Yanagisawa, C., Toshito, T., Mitsuda, C., Miyano, K., Shibata, T., Kajiyama, Y., Nagashima, Y., Takita, M., Yoshida, M., Kim, H. I., Okazawa, H., Ishizuka, T., Choi, Y., Seo, H. K., Gando, Y., Hasegawa, T., Inoue, K., Shirai, J., Suzuki, A., Koshiba, M., Hashimoto, T., Nakajima, Y., Nishijima, K., Harada, T., Ishino, H., Morii, M., Nishimura, R., Watanabe, Y., Kielczewska, D., Zalipska, J., Gran, R., Shiraishi, K. K., Washburn, K., and Wilkes, R. J.

Subjects
High Energy Physics - Experiment, Astrophysics
Abstract

We present the results of indirect searches for Weakly Interacting Massive Particles (WIMPs) with 1679.6 live days of data from the Super-Kamiokande detector using neutrino-induced upward through-going muons. The search is performed by looking for an excess of high energy muon neutrinos from WIMP annihilations in the Sun, the core of the Earth, and the Galactic Center, as compared to the number expected from the atmospheric neutrino background. No statistically significant excess was seen. We calculate flux limits in various angular cones around each of the above celestial objects. We obtain conservative model-independent upper limits on WIMP-nucleon cross-section as a function of WIMP mass and compare these results with the corresponding results from direct dark matter detection experiments., Comment: 10 pages, 14 figures, Submitted to Phys. Rev. D

Published
2004
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191. Weak ferromagnetism with very large canting in a chiral lattice: (pyrimidine)2FeCl2

Author

Feyerherm, R., Loose, A., Ishida, T., Nogami, T., Kreitlow, J., Baabe, D., Litterst, F. J., Suellow, S., Klauss, H. -H., and Doll, K.

Subjects
Condensed Matter
Abstract

The transition metal coordination compound (pyrimidine)2FeCl2 crystallizes in a chiral lattice, space group I 4_1 2 2 (or I4_3 2 2). Combined magnetization, Mossbauer spectroscopy and powder neutron diffraction studies reveal that it is a canted antiferromagnet below T_N = 6.4 K with an unusually large canting of the magnetic moments of 14 deg. from their general antiferromagnetic alignment, one of the largest reported to date. This results in weak ferromagnetism with a ferromagnetic component of 1 mu_B. The large canting is due to the interplay between the antiferromagnetic exchange interaction and the local single-ion anisotropy in the chiral lattice. The magnetically ordered structure of (pyrimidine)2FeCl2, however, is not chiral. The implications of these findings for the search of molecule based materials exhibiting chiral magnetic ordering is discussed., Comment: 6 pages, 5 figures

Published
2003
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192. Tracking Performance of the Scintillating Fiber Detector in the K2K Experiment

Author

Kim, B. J., Iwashita, T., Ishida, T., Jeon, E. J., Yokoyama, H., Aoki, S., Berns, H. G., Bhang, H. C., Boyd, S., Fujii, K., Hara, T., Hayato, Y., Hill, J., Ishii, T., Ishino, H., Jung, C. K., Kearns, E., Kim, H. I., Kim, J. H., Kim, J. Y., Kim, S. B., Kobayashi, T., Matsuno, S., Mine, S., Nakamura, K., Nakamura, M., Nishikawa, K., Otaki, T., Oyama, Y., Park, H., Sakuda, M., Scholberg, K., Sharkey, E., Stone, J. L., Suzuki, A., Takenaka, K., Tamura, N., Tanaka, Y., Walter, C. W., Wilkes, J., Yoo, J., and Yoshida, M.

Subjects
High Energy Physics - Experiment
Abstract

The K2K long-baseline neutrino oscillation experiment uses a Scintillating Fiber Detector (SciFi) to reconstruct charged particles produced in neutrino interactions in the near detector. We describe the track reconstruction algorithm and the performance of the SciFi after three years of operation., Comment: 24pages,18 figures, and 1 table. Preprint submitted to NIM

Published
2002
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193. Analyzing power of the ${\vec p}p \to pp{\pi}^0$ reaction at beam energy of 390 MeV

Author

Maeda, Y., Segawa, M., Yoshida, H. P., Nomachi, M., Shimbara, Y., Sugaya, Y., Yasuda, K., Tamura, K., Ishida, T., Yagita, T., and Kacharava, A.

Subjects
Nuclear Experiment
Abstract

The analyzing power of ${\vec p}p\to pp{\pi}^0$ reaction has been measured at the beam energy of 390 MeV. The missing mass technique of final protons has been applied to identify the $\pi^0$ production event. The dependences of the analyzing power on the pion emission-angle and the relative momentum of the protons have beenobtained. The angular dependence could be decomposed by the Legendre polynomial and the relative contribution of the $P_{21}$ to $P_{11}$ function is less than 20%. The P-state amplitude is found to be the dominant component of the $\pi$ production near the threshold. The momentum dependence of the analyzing power has been studied to obtain the information about the pion production mechanism. It has been deduced that the pion production due to the long range interaction plays an important role in the momentum dependence of the P-state amplitude., Comment: 7 pages, Latex, 3 Postscript figures, Submitted to Phys. Lett. B

Published
2001

194. Near Muon Range Detector for the K2K Experiment -Construction and Performance-

Author

K2K MRD Group, Ishii, T., Inagaki, T., Breault, J., Chikamatsu, T., Choi, J. H., Hasegawa, T., Hayato, Y., Ishida, T., Jang, H. I., Jang, J. S., Jeong, E. M., Kato, I., Kibayashi, A., Kim, B. J., Kim, H. I., Kim, J. Y., Kim, S. B., Kobayashi, T., Kropp, W., Lee, H. K., Lee, S. B., Lim, I. T., Ma, K. J., Maruyama, T., Mine, S., Nakamura, K., Nakamura, M., Nakano, I., Nishikawa, K., Oyama, Y., Pac, M. Y., Sakai, A., Sakuda, M., Shiino, K., Tauchi, K., Tumakov, V., Yoo, J., and You, S. Y.

Subjects
High Energy Physics - Experiment
Abstract

A muon range detector (MRD) has been constructed as a near detector for the KEK-to-Kamioka long-baseline neutrino experiment (K2K). It monitors the neutrino beam properties at the near site by measuring the energy, angle and production point of muons produced by charged-current neutrino interaction. The detector has been working stably since the start of the K2K experiment., Comment: 18 pages, 17 eps-figures, uses elsart.cls. To be published in Nucl. Instr. and Methods A

Published
2001
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195. The JHF-Kamioka neutrino project

Author

Itow, Y., Kajita, T., Kaneyuki, K., Shiozawa, M., Totsuka, Y., Hayato, Y., Ishida, T., Ishii, T., Kobayashi, T., Maruyama, T., Nakamura, K., Obayashi, Y., Oyama, Y., Sakuda, M., Yoshida, M., Aoki, S., Hara, T., Suzuki, A., Ichikawa, A., Nakaya, T., Nishikawa, K., Hasegawa, T., Ishihara, K., and Konaka, A.

Subjects
High Energy Physics - Experiment
Abstract

The JHF-Kamioka neutrino project is a second generation long base line neutrino oscillation experiment that probes physics beyond the Standard Model by high precision measurements of the neutrino masses and mixing. A high intensity narrow band neutrino beam is produced by secondary pions created by a high intensity proton synchrotron at JHF (JAERI). The neutrino energy is tuned to the oscillation maximum at ~1 GeV for a baseline length of 295 km towards the world largest water Cerenkov detector, Super-Kamiokande. Its excellent energy resolution and particle identification enable the reconstruction of the initial neutrino energy, which is compared with the narrow band neutrino energy, through the quasi-elastic interaction. The physics goal of the first phase is an order of magnitude better precision in the nu_mu to nu_tau oscillation measurement (delta(Delta m_23^2)=10^-4 eV^2 and delta(sin^22theta_23)=0.01), a factor of 20 more sensitive search in the nu_mu to nu_e appearance (sin^22theta_{mu e} ~ 0.5sin^22theta_{13}>0.003), and a confirmation of the nu_mu to nu_tau oscillation or discovery of sterile neutrinos by detecting the neutral current events. In the second phase, an upgrade of the accelerator from 0.75 MW to 4 MW in beam power and the construction of 1 Mt Hyper-Kamiokande detector at Kamioka site are envisaged. Another order of magnitude improvement in the nu_mu to nu_e oscillation sensitivity, a sensitive search of the CP violation in the lepton sector (CP phase "delta" down to 10-20 degrees), and an order of magnitude improvement in the proton decay sensitivity is also expected., Comment: 29 pages, 23 figures

Published
2001

196. Involvement of complement activation in the pulmonary vasoactivity of polystyrene nanoparticles in pigs: unique surface properties underlying alternative pathway activation and instant opsonization

Author

Mészáros T, Kozma GT, Shimizu T, Miyahara K, Turjeman K, Ishida T, Barenholz Y, Urbanics R, and Szebeni J

Subjects
adverse drug reactions, immunotoxicity, nanoparticles, pseudoallergy, anaphylatoxins, PIM cells, phagocytosis, Medicine (General), R5-920
Abstract

Tamás Mészáros,1,2,* Gergely Tibor Kozma,2,* Taro Shimizu,3 Koga Miyahara,3 Keren Turjeman,4 Tatsuhiro Ishida,3 Yechezkel Barenholz,4 Rudolf Urbanics,1,2 János Szebeni1,2,5 1Nanomedicine Research and Education Center, Department of Pathophysiology, Semmelweis University, Budapest, Hungary; 2SeroScience Ltd, Budapest, Hungary; 3Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, Tokushima, Japan; 4Laboratory of Membrane and Liposome Research, Department of Biochemistry and Molecular Biology, Institute for Medical Research Israel-Canada (IMRIC), The Hebrew University-Hadassah Medical School, Jerusalem, Israel; 5Department of Nanobiotechnology and Regenerative Medicine, Faculty of Health, Miskolc University, Miskolc, Hungary *These authors contributed equally to this work Background: It has been proposed that many hypersensitivity reactions to nanopharmaceuticals represent complement (C)-activation-related pseudoallergy (CARPA), and that pigs provide a sensitive animal model to study the phenomenon. However, a recent study suggested that pulmonary hypertension, the pivotal symptom of porcine CARPA, is not mediated by C in cases of polystyrene nanoparticle (PS-NP)-induced reactions.Goals: To characterize PS-NPs and reexamine the contribution of CARPA to their pulmonary reactivity in pigs.Study design: C activation by 200, 500, and 750 nm (diameter) PS-NPs and their opsonization were measured in human and pig sera, respectively, and correlated with hemodynamic effects of the same NPs in pigs in vivo.Methods: Physicochemical characterization of PS-NPs included size, ζ-potential, cryo-transmission electron microscopy, and hydrophobicity analyses. C activation in human serum was measured by ELISA and opsonization of PS-NPs in pig serum by Western blot and flow cytometry. Pulmonary vasoactivity of PS-NPs was quantified in the porcine CARPA model.Results: PS-NPs are monodisperse, highly hydrophobic spheres with strong negative surface charge. In human serum, they caused size-dependent, significant rises in C3a, Bb, and sC5b-9, but not C4d. Exposure to pig serum led within minutes to deposition of C5b-9 and opsonic iC3b on the NPs, and opsonic iC3b fragments (C3dg, C3d) also appeared in serum. PS-NPs caused major hemodynamic changes in pigs, primarily pulmonary hypertension, on the same time scale (minutes) as iC3b fragmentation and opsonization proceeded. There was significant correlation between C activation by different PS-NPs in human serum and pulmonary hypertension in pigs.Conclusion: PS-NPs have extreme surface properties with no relevance to clinically used nanomedicines. They can activate C via the alternative pathway, entailing instantaneous opsonization of NPs in pig serum. Therefore, rather than being solely C-independent reactivity, the mechanism of PS-NP-induced hypersensitivity in pigs may involve C activation. These data are consistent with the “double-hit” concept of nanoparticle-induced hypersensitivity reactions involving both CARPA and C-independent pseudoallergy. Keywords: adverse drug reactions, immunotoxicity, nanoparticles, pseudoallergy, anaphylatoxins, PIM cells, phagocytosis

Published
2018

197. Plasma ropivacaine concentration after TAP block in a patient with cardiac and renal failure

Author

Ishida T, Tanaka S, Sakamoto A, Hirabayashi T, and Kawamata M

Subjects
Transversus abdominis plane block, plasma concentration of ropivacaine, cardiac and renal failure, central nervous toxicity, Anesthesiology, RD78.3-87.3
Abstract

Takashi Ishida, Satoshi Tanaka, Akiyuki Sakamoto, Takanobu Hirabayashi, Mikito Kawamata Department of Anesthesiology and Resuscitology, Shinshu University School of Medicine, Matsumoto, Nagano, Japan Abstract: We report a successful ultrasound-guided transversus abdominis plane (TAP) block as an analgesic option for minor abdominal surgery in a 66-year-old patient with cardiac, respiratory, and renal dysfunction caused by primary systemic amyloidosis. Bilateral TAP blocks with 120 mg (1.8 mg/kg) of ropivacaine provided sufficient intra- and postoperative analgesia for insertion of a continuous ambulatory peritoneal dialysis catheter. However, the plasma concentration of ropivacaine reached a maximum of 2.5 µg/mL at 15 minutes after the TAP block, a concentration that was potentially neurotoxic. Although apparent signs of local anesthetic systemic toxicity (LAST) such as convulsion or changes in an electrocardiogram were not observed, the patient became drowsy after the TAP block, which might be one of the mild symptoms of LAST. A TAP block by itself can thus be an anesthetic option for patients undergoing minor abdominal surgery. However, cardiac and renal dysfunction might influence the pharmacokinetics of a local anesthetic used, and attention should be paid to the possibility of LAST even with a low dose of a local anesthetic for patients with cardiac and renal failure. Keywords: transversus abdominis plane block, plasma concentration of ropivacaine, cardiac failure, renal dysfunction, central nervous toxicity

Published
2018

198. Development of large area SOI pixel sensor "XRPIX-X" with pinned depleted diode structure

Author

Uenomachi, M., primary, Tsuru, T. G., additional, Uchida, H., additional, Ikeda, T., additional, Matsuda, M., additional, Narita, T., additional, Izumi, D., additional, Magata, K., additional, Iwakiri, U., additional, Yukumoto, M., additional, Takeda, A., additional, Mori, K., additional, Ishida, T., additional, Nishioka, Y., additional, Shimazoe, K., additional, Takahashi, H., additional, Hagino, K., additional, Kurachi, I., additional, Arai, Y., additional, Kohmura, T., additional, Uchida, Y., additional, Tanaka, T., additional, and Suzuki, H., additional

Published
2023
Full Text
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200. Multi-Institutional Fact-Finding Study: Association between Geriatric Assessment and Reduction in Intensity of Radiotherapy for Elderly Cancer Patients without Metastasis

Author

Murofushi, K., primary, Kuribayashi, S., additional, Ohnishi, K., additional, Hayakawa, S., additional, Tsuchida, K., additional, Inoue, Y., additional, Ohkawa, A., additional, Ishida, T., additional, Machitori, Y., additional, Nakai, K., additional, and Takizawa, D., additional

Published
2023
Full Text
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