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arXiv · 1010.0118

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
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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..

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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. 2010-10-01. Solar neutrino results in Super-Kamiokande-III. https://doi.org/10.1103/physrevd.83.052010

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