Phys. Rev. D
78,
032002
(2008)
[11 pages]
Solar neutrino measurements in Super-Kamiokande-II
J. P. Cravens et al. The Super-Kamiokande Collaboration
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J. P. Cravens6, K. Abe1, T. Iida1, K. Ishihara1, J. Kameda1, Y. Koshio1, A. Minamino1, C. Mitsuda1,*, M. Miura1, S. Moriyama1, M. Nakahata1,3, S. Nakayama1, Y. Obayashi1, H. Ogawa1, H. Sekiya1, M. Shiozawa1, Y. Suzuki1,3, A. Takeda1, Y. Takeuchi1, K. Ueshima1, H. Watanabe1, S. Yamada1, I. Higuchi2, C. Ishihara2, M. Ishitsuka2, T. Kajita2,3, K. Kaneyuki2, G. Mitsuka2, H. Nishino2, K. Okumura2, C. Saji2, Y. Takenaga2, S. Clark4, S. Desai4,†, F. Dufour4, E. Kearns4, S. Likhoded4, M. Litos4, J. L. Raaf4, J. L. Stone4, L. R. Sulak4, W. Wang4, M. Goldhaber5, D. Casper6, J. Dunmore6, W. R. Kropp6, D. W. Liu6, S. Mine6, C. Regis6, M. B. Smy6, H. W. Sobel3,6, M. R. Vagins6, K. S. Ganezer7, J. Hill7, W. E. Keig7, J. S. Jang8, J. Y. Kim8, I. T. Lim8, M. Fechner9, K. Scholberg9, N. Tanimoto9, C. W. Walter9, R. Wendell9, R. W. Ellsworth10, S. Tasaka11, G. Guillian12, J. G. Learned12, S. Matsuno12, M. D. Messier13, Y. Watanabe14, Y. Hayato1,15, A. K. Ichikawa15, T. Ishida15, T. Ishii15, T. Iwashita15, T. Kobayashi15, T. Nakadaira15, K. Nakamura15, K. Nitta15, Y. Oyama15, Y. Totsuka15, A. T. Suzuki16, M. Hasegawa17, K. Hiraide17, I. Kato17,‡, H. Maesaka17, T. Nakaya17, K. Nishikawa17, T. Sasaki17, H. Sato17, S. Yamamoto17, M. Yokoyama17, T. J. Haines6,18, S. Dazeley19, S. Hatakeyama19, R. Svoboda19, G. W. Sullivan20, D. Turcan20, A. Habig21, Y. Fukuda22, T. Sato22, Y. Itow23, T. Koike23, T. Tanaka23, C. K. Jung24, T. Kato24, K. Kobayashi24, M. Malek24, C. McGrew24, A. Sarrat24, R. Terri24, C. Yanagisawa24, N. Tamura25, Y. Idehara26, M. Ikeda26, M. Sakuda26, M. Sugihara26, Y. Kuno27, M. Yoshida27, S. B. Kim28, B. S. Yang28, J. Yoo28, T. Ishizuka29, H. Okazawa30, Y. Choi31, H. K. Seo31, Y. Gando32, T. Hasegawa32, K. Inoue32, Y. Furuse33, H. Ishii33, K. Nishijima33, H. Ishino34, M. Koshiba35, S. Chen36, Z. Deng36, Y. Liu36, D. Kielczewska6,37, H. Berns38, R. Gran20,38, K. K. Shiraishi38, A. Stachyra38, E. Thrane38, K. Washburn38, and R. J. Wilkes38 (The Super-Kamiokande Collaboration)
1Kamioka Observatory, Institute for Cosmic Ray Research, University of Tokyo, Kamioka, Gifu, 506-1205, Japan
2Research Center for Cosmic Neutrinos, Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
3Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
4Department of Physics, Boston University, Boston, Massachusetts 02215, USA
5Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA
6Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575, USA
7Department of Physics, California State University, Dominguez Hills, Carson, California 90747, USA
8Department of Physics, Chonnam National University, Kwangju 500-757, Korea
9Department of Physics, Duke University, Durham, North Carolina 27708, USA
10Department of Physics, George Mason University, Fairfax, Virginia 22030, USA
11Department of Physics, Gifu University, Gifu, Gifu 501-1193, Japan
12Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA
13Department of Physics, Indiana University, Bloomington, Indiana 47405-7105, USA
14Physics Division, Department of Engineering, Kanagawa University, Kana gawa, Yokohama 221-8686, Japan
15High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
16Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
17Department of Physics, Kyoto University, Kyoto 606-8502, Japan
18Physics Division, P-23, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA
19Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
20Department of Physics, University of Maryland, College Park, Maryland 20742, USA
21Department of Physics, University of Minnesota, Duluth, Minnesota 55812-2496, USA
22Department of Physics, Miyagi University of Education, Sendai, Miyagi 980-0845, Japan
23Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aic hi 464-8602, Japan
24Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800, USA
25Department of Physics, Niigata University, Niigata, Niigata 950-2181, Japan
26Department of Physics, Okayama University, Okayama, Okayama 700-8530, Japan
27Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
28Department of Physics, Seoul National University, Seoul 151-742, Korea
29Department of Systems Engineering, Shizuoka University, Hamamatsu, Shizuoka 432-8561, Japan
30Department of Informatics in Social Welfare, Shizuoka University of Welfare, Yaizu, Shizuoka, 425-8611, Japan
31Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea
32Research Center for Neutrino Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
33Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
34Department of Physics, Tokyo Institute for Technology, Meguro, Tokyo 152-8551, Japan
35The University of Tokyo, Tokyo 113-0033, Japan
36Department of Engineering Physics, Tsinghua University, Beijing, 10008 4, China
37Institute of Experimental Physics, Warsaw University, 00-681 Warsaw, Poland
38Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA
Received 14 March 2008; published 6 August 2008
The results of the second phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first phase. The solar neutrino flux spectrum and time variation as well as oscillation results are statistically consistent with the first phase and do not show spectral distortion. The time-dependent flux measurement of the combined first and second phases coincides with the full period of solar cycle 23 and shows no correlation with solar activity. The measured 8B total flux is (2.38±0.05(stat.)-0.15+0.16(sys.))×106 cm-2 s-1 and the day-night difference is found to be (-6.3±4.2(stat.)±3.7(sys.))%. There is no evidence of systematic tendencies between the first and second phases.
© 2008 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.78.032002
DOI:
10.1103/PhysRevD.78.032002
*Present address: High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan †Present address: Center for Gravitational Wave Physics, Pennsylvania State University, University Park, PA 16802, USA. ‡Present address: TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.
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