Solar neutrino measurements in Super-Kamiokande-IV

被引:210
作者
Abe, K. [1 ,32 ]
Haga, Y. [1 ]
Hayato, Y. [1 ,32 ]
Ikeda, M. [1 ]
Iyogi, K. [1 ]
Kameda, J. [1 ,32 ]
Kishimoto, Y. [1 ,32 ]
Marti, Ll. [1 ]
Miura, M. [1 ,32 ]
Moriyama, S. [1 ,32 ]
Nakahata, M. [1 ,32 ]
Nakajima, T. [1 ]
Nakayama, S. [1 ,32 ]
Orii, A. [1 ]
Sekiya, H. [1 ,32 ]
Shiozawa, M. [1 ,32 ]
Sonoda, Y. [1 ]
Takeda, A. [1 ,32 ]
Tanaka, H. [1 ]
Takenaga, Y. [1 ]
Tasaka, S. [1 ]
Tomura, T. [1 ]
Ueno, K. [1 ]
Yokozawa, T. [1 ]
Akutsu, R. [2 ]
Irvine, T. [2 ]
Kaji, H. [2 ]
Kajita, T. [2 ,32 ]
Kametani, I. [2 ]
Kaneyuki, K. [2 ,32 ]
Lee, K. P. [2 ]
Nishimura, Y. [2 ]
McLachlan, T. [2 ]
Okumura, K. [2 ,32 ]
Richard, E. [2 ]
Labarga, L. [3 ]
Fernandez, P. [3 ]
Blaszczyk, F. d. M. [4 ]
Gustafson, J. [4 ]
Kachulis, C. [4 ]
Kearns, E. [4 ,32 ]
Raaf, J. L. [4 ]
Stone, J. L. [4 ,32 ]
Sulak, L. R. [4 ]
Berkman, S. [5 ]
Tobayama, S. [5 ]
Goldhaber, M. [6 ]
Bays, K. [7 ]
Carminati, G. [7 ]
Griskevich, N. J. [7 ]
机构
[1] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Kamioka, Gifu 5061205, Japan
[2] Univ Tokyo, Res Ctr Cosm Neutrinos, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan
[3] Univ Autonoma Madrid, Dept Theoret Phys, Madrid 28049, Spain
[4] Boston Univ, Dept Phys, Boston, MA 02215 USA
[5] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada
[6] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
[7] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[8] Calif State Univ, Dept Phys, Carson, CA 90747 USA
[9] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea
[10] Duke Univ, Dept Phys, Durham, NC 27708 USA
[11] Fukuoka Inst Technol, Jr Coll, Fukuoka, Fukuoka 8110295, Japan
[12] Gifu Univ, Dept Phys, Gifu, Gifu 5011193, Japan
[13] Gwangju Inst Sci & Technol, GIST Coll, Gwangju 500712, South Korea
[14] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA
[15] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan
[16] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan
[17] Kyoto Univ, Dept Phys, Kyoto, Kyoto 6068502, Japan
[18] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi 9800845, Japan
[19] Nagoya Univ, Inst Space Earth Enviromental Res, Nagoya, Aichi 4648602, Japan
[20] Nagoya Univ, Kobayashi Maskawa Inst Origin Particles & Univ, Nagoya, Aichi 4648602, Japan
[21] Natl Ctr Nucl Res, PL-00681 Warsaw, Poland
[22] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA
[23] Okayama Univ, Dept Phys, Okayama, Okayama 7008530, Japan
[24] Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan
[25] Univ Regina, Dept Phys, 3737 Wascana Pkwy, Regina, SK S4S 0A2, Canada
[26] Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea
[27] Shizuoka Univ Welf, Dept Informat Social Welf, Yaizu, Shizuoka 4258611, Japan
[28] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea
[29] Tokai Univ, Dept Phys, Hiratsuka, Kanagawa 2591292, Japan
[30] Univ Tokyo, Bunkyo Ku, Tokyo 1130033, Japan
[31] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
[32] Univ Tokyo, Univ Tokyo Inst Adv Study, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan
[33] Univ Toronto, Dept Phys, 60 St, Toronto, ON M5S 1A7, Canada
[34] TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada
[35] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China
[36] Univ Washington, Dept Phys, Seattle, WA 98195 USA
[37] BMCC CUNY, Dept Sci, New York, NY USA
基金
欧盟地平线“2020”; 新加坡国家研究基金会; 美国国家科学基金会;
关键词
OSCILLATIONS; CALIBRATION; SEARCH; MATTER;
D O I
10.1103/PhysRevD.94.052010
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Upgraded electronics, improved water system dynamics, better calibration and analysis techniques allowed Super-Kamiokande-IV to clearly observe very low-energy B-8 solar neutrino interactions, with recoil electron kinetic energies as low as similar to 3.5 MeV. Super-Kamiokande-IV data-taking began in September of 2008; this paper includes data until February 2014, a total livetime of 1664 days. The measured solar neutrino flux is (2.308 +/- 0.020)(stat)(-0.040)(+0.039) (syst)) x 10(6)/(cm(2) sec) assuming no oscillations. The observed recoil electron energy spectrum is consistent with no distortions due to neutrino oscillations. An extended maximum likelihood fit to the amplitude of the expected solar zenith angle variation of the neutrino-electron elastic scattering rate in SK-IV results in a day/night asymmetry of (-3.6 +/- 1.6(stat) +/- 0.6(syst)%. The SK-IV solar neutrino data determine the solar mixing angle as sin(2)theta(12) = 0.327(-0.031)(+0.026), all SK solar data (SK-I, SK-II, SK III and SK-IV) measures this angle to be sin(2)theta(12) = 0.334(-0.023)(+0.027), the determined mass-squared splitting is Delta m(21)(2) = 4.8(-0.8)(+1.5) x 10(-5) eV(2).
引用
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页数:32
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