Phys. Rev. Lett. 81, 1158 - 1162 (1998)
Measurements of the Solar Neutrino Flux from Super-Kamiokande's First 300 Days
Y. Fukuda et al.
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Y. Fukuda1, T. Hayakawa1, E. Ichihara1, K. Inoue1, K. Ishihara1, H. Ishino1, Y. Itow1, T. Kajita1, J. Kameda1, S. Kasuga1, K. Kobayashi1, Y. Kobayashi1, Y. Koshio1, K. Martens1, M. Miura1, M. Nakahata1, S. Nakayama1, A. Okada1, M. Oketa1, K. Okumura1, M. Ota1, N. Sakurai1, M. Shiozawa1, Y. Suzuki1, Y. Takeuchi1, Y. Totsuka1, S. Yamada1, M. Earl2, A. Habig2, J. T. Hong2, E. Kearns2, S. B. Kim2 *, M. Masuzawa2 †, M. D. Messier2, K. Scholberg2, J. L. Stone2, L. R. Sulak2, C. W. Walter2, M. Goldhaber3, T. Barszczak4, W. Gajewski4, P. G. Halverson4 ‡, J. Hsu4, W. R. Kropp4, L. R. Price4, F. Reines4, H. W. Sobel4, M. R. Vagins4, K. S. Ganezer5, W. E. Keig5, R. W. Ellsworth6, S. Tasaka7, J. W. Flanagan8 §, A. Kibayashi8, J. G. Learned8, S. Matsuno8, V. Stenger8, D. Takemori8, T. Ishii9, J. Kanzaki9, T. Kobayashi9, K. Nakamura9, K. Nishikawa9, Y. Oyama9, A. Sakai9, M. Sakuda9, O. Sasaki9, S. Echigo10, M. Kohama10, A. T. Suzuki10, T. J. Haines11,4, E. Blaufuss12, R. Sanford12, R. Svoboda12, M. L. Chen13, Z. Conner13 **, J. A. Goodman13, G. W. Sullivan13, M. Mori14 ††, J. Hill15, C. K. Jung15, C. Mauger15, C. McGrew15, E. Sharkey15, B. Viren15, C. Yanagisawa15, W. Doki16, T. Ishizuka16 ‡‡, Y. Kitaguchi16, H. Koga16, K. Miyano16, H. Okazawa16, C. Saji16, M. Takahata16, A. Kusano17, Y. Nagashima17, M. Takita17, T. Yamaguchi17, M. Yoshida17, M. Etoh18, K. Fujita18, A. Hasegawa18, T. Hasegawa18, S. Hatakeyama18, T. Iwamoto18, T. Kinebuchi18, M. Koga18, T. Maruyama18, H. Ogawa18, A. Suzuki18, F. Tsushima18, M. Koshiba19, M. Nemoto20, K. Nishijima20, T. Futagami21, Y. Hayato21, Y. Kanaya21, K. Kaneyuki21, Y. Watanabe21, D. Kielczewska22,4, R. Doyle23, J. George23, A. Stachyra23, L. Wai23, J. Wilkes23, and K. Young23
1Institute for Cosmic Ray Research, University of Tokyo, Tanashi, Tokyo 188-8502, Japan
2Department of Physics, Boston University, Boston, Massachusetts 02215
3Physics Department, Brookhaven National Laboratory, Upton, New York 11973
4Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697-4575
5Department of Physics, California State University, Dominguez Hills, Carson, California 90747
6Department of Physics, George Mason University, Fairfax, Virginia 22030
7Department of Physics, Gifu University, Gifu, Gifu 501-1193, Japan
8Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822
9Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
10Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
11Physics Division, P-23, Los Alamos National Laboratory, Los Alamos, New Mexico 87544
12Physics Department, Louisiana State University, Baton Rouge, Louisiana 70803
13Department of Physics, University of Maryland, College Park, Maryland 20742
14Department of Physics, Miyagi University of Education, Sendai, Miyagi 980-0845, Japan
15Physics Department, State University of New York, Stony Brook, New York 11794-3800
16Department of Physics, Niigata University, Niigata, Niigata 950-2181, Japan
17Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
18Department of Physics, Tohoku University, Sendai, Miyagi 980-8578, Japan
19The University of Tokyo, Tokyo 113-0033, Japan
20Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
21Department of Physics, Tokyo Institute for Technology, Meguro, Tokyo 152-8551, Japan
22Institute of Experimental Physics, Warsaw University, 00-681 Warsaw, Poland
23Department of Physics, University of Washington, Seattle, Washington 98195-1560
See Also: Erratum
Received 15 April 1998
The first results of the solar neutrino flux measurement from Super-Kamiokande are presented. The results shown here are obtained from data taken between 31 May 1996, and 23 June 1997. Using our measurement of recoil electrons with energies above 6.5 MeV, we infer the total flux of 8B solar neutrinos to be 2.42±0.06(stat)-0.07+0.10(syst)×106 cm -2 s-1. This result is consistent with the Kamiokande measurement and is 36% of the flux predicted by the BP95 solar model. The flux is also measured in 1.5 month subsets and shown to be consistent with a constant rate.
©1998 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevLett.81.1158
DOI: 10.1103/PhysRevLett.81.1158
PACS: 26.65.+t, 95.85.Ry, 96.40.Tv
* Present address: Department of Physics, Seoul National University, Seoul 151-742, Korea.
† Present address: Accelerator Laboratory, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
‡ Present address: NASA, JPL, Pasadena, CA 91109.
§
** Present address: Enrico Fermi Institute, University of Chicago, Chicago, IL 60637.
†† Present address: Institute for Cosmic Ray Research, University of Tokyo, Tanashi, Tokyo 188-8502, Japan.
‡‡ Present address: Department of System Engineering, Shizuoka University Hamakita, Shizuoka 432-8561, Japan.
See Also
Erratum:
Y. Fukuda et al.,
Erratum: Measurements of the Solar Neutrino Flux from Super-Kamiokande's First 300 Days [Phys. Rev. Lett. 81, 1158 (1998)],
Phys. Rev. Lett. 81, 4279 (1998)
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