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Solar neutrino results in Super-Kamiokande-III

  • K. Abe
  • , Y. Hayato
  • , T. Iida
  • , M. Ikeda
  • , C. Ishihara
  • , K. Iyogi
  • , J. Kameda
  • , K. Kobayashi
  • , Y. Koshio
  • , Y. Kozuma
  • , M. Miura
  • , S. Moriyama
  • , M. Nakahata
  • , S. Nakayama
  • , Y. Obayashi
  • , H. Ogawa
  • , H. Sekiya
  • , M. Shiozawa
  • , Y. Suzuki
  • , A. Takeda
  • Y. Takenaga, K. Ueno, K. Ueshima, H. Watanabe, S. Yamada, T. Yokozawa, S. Hazama, H. Kaji, T. Kajita, K. Kaneyuki, T. McLachlan, K. Okumura, Y. Shimizu, N. Tanimoto, M. R. Vagins, L. Labarga, L. M. Magro, F. Dufour, E. Kearns, M. Litos, J. L. Raaf, J. L. Stone, L. R. Sulak, W. Wang, M. Goldhaber, K. Bays, D. Casper, J. P. Cravens, W. R. Kropp, S. Mine, C. Regis, A. Renshaw, M. B. Smy, H. W. Sobel, K. S. Ganezer, J. Hill, W. E. Keig, J. S. Jang, J. Y. Kim, I. T. Lim, J. Albert, R. Wendell, T. Wongjirad, K. Scholberg, C. W. Walter, T. Ishizuka, S. Tasaka, J. G. Learned, S. Matsuno, Y. Watanabe, T. Hasegawa, T. Ishida, T. Ishii, T. Kobayashi, T. Nakadaira, K. Nakamura, K. Nishikawa, H. Nishino, Y. Oyama, K. Sakashita, T. Sekiguchi, T. Tsukamoto, A. T. Suzuki, Y. Takeuchi, A. Minamino, T. Nakaya, Y. Fukuda, Y. Itow, G. Mitsuka, T. Tanaka, C. K. Jung, G. Lopez, C. McGrew, R. Terri, C. Yanagisawa, N. Tamura, H. Ishino, A. Kibayashi, S. Mino, T. Mori, M. Sakuda, H. Toyota, Y. Kuno, M. Yoshida, S. B. Kim, B. S. Yang, T. Ishizuka, H. Okazawa, Y. Choi, K. Nishijima, Y. Yokosawa, M. Koshiba, Y. Totsuka, M. Yokoyama, S. Chen, Y. Heng, Z. Yang, H. Zhang, D. Kielczewska, P. Mijakowski, K. Connolly, M. Dziomba, E. Thrane, R. J. Wilkes
  • The University of Tokyo
  • Kyoto University
  • University of California at Irvine
  • Universidad Autónoma de Madrid
  • Boston University
  • University of Wisconsin-Madison
  • Brookhaven National Laboratory
  • California State University Dominguez Hills
  • Chonnam National University
  • Duke University
  • Fukuoka Institute of Technology
  • Gifu University
  • University of Hawai'i at Mānoa
  • Kanagawa University
  • High Energy Accelerator Research Organization, Tsukuba
  • Kobe University
  • Miyagi University of Education
  • Nagoya University
  • Stony Brook University
  • Niigata University
  • Okayama University
  • The University of Osaka
  • Seoul National University
  • Shizuoka University
  • Shizuoka University of Welfare
  • Sungkyunkwan University
  • Tokai University
  • Tsinghua University
  • University of Warsaw
  • University of Washington
  • University of Minnesota Twin Cities

Research output: Contribution to journalArticlepeer-review

378 Scopus citations

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 B8 solar flux in the 5.0 to 20 MeV total electron energy region is 2.32±0.04(stat) ±0.05(sys)×106cm-2sec-1 under the assumption of pure electron-flavor content, 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 sin12=0.30-0.01+0.02(tan12=0.42-0.02+0.04) and Δm212=6.2-1.9+1.1×10 -5eV2. Combined with KamLAND results, the best-fit oscillation parameters are found to be sin12=0.31±0. 01(tan12=0.44±0.03) and Δm212=7.6±0.2×10-5eV2. The B8 neutrino flux obtained from global solar neutrino experiments is 5.3±0.2(stat+sys) ×106cm-2s-1, while the B8 flux becomes 5.1±0.1(stat+sys)×106cm-2s-1 by adding KamLAND results. In a three-flavor analysis combining all solar neutrino experiments, the upper limit of sin13 is 0.060 at 95% C.L.. After combination with KamLAND results, the upper limit of sin13 is found to be 0.059 at 95% C.L.

Original languageEnglish
Article number052010
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume83
Issue number5
DOIs
StatePublished - Mar 24 2011

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