1999
article
The Super-Kamiokande Collaboration
T. Futagami, T. Hayakawa, K. Inoue, K. Ishihara, H. Ishino, Y. Itow, T. Kajita, J. Kameda, S. Kasuga, Kazuyoshi Kobayashi, Yoshiyuki Kobayashi, Y. Koshio, M. Miura, M. Nakahata, S. Nakayama, Y. Obayashi, Atsushi Okada, K. Okumura, N. Sakurai, M. Shiozawa, Yoshihiro Suzuki, H. Takeuchi, Y. Takeuchi, Y. Totsuka, S. Yamada, M. Earl, A. Habig, E. Kearns, M. D. Messier, K. Scholberg, J. L. Stone, Lawrence Sulak, C. W. Walter, M. Goldhaber, T. Barszczak, D. Casper, W. Gajewski, W. R. Kropp, S. Mine, M. Smy, H. W. Sobel, M. R. Vagins, K. S. Ganezer, W. E. Keig, R. W. Ellsworth, S. Tasaka, A. Kibayashi, S. Matsuno, V. J. Stenger, D. Takemori, Takehiko Ishii, J. Kanzaki, T. Kobayashi, K. Nakamura, Kiyoshi Nishikawa, Y. Oyama, Akito Sakai, M. Sakuda, O. Sasaki, S. Echigo, M. Kohama, Y. Suzuki, T. J. Haines, E. Blaufuss, B. K. Kim, R. Sanford, R. Svoboda, M. L. Chen, J. A. Goodman, G. W. Sullivan, J. Hill, C. K. Jung, K. Martens, C. Mauger, C. McGrew, E. Sharkey, W. Doki, Makoto Kirisawa, S. Inaba, H. Okazawa, M. Takahashi, Koji Higuchi, Y. Nagashima, M. Takita, Tomohiro Yamaguchi, Makoto Yoshida, S. B. Kim, Masato Eto, T. Hasegawa, S. Hatakeyama, T. Iwamoto, M. Koga, T. Maruyama, H. Ogawa, J. Shirai, F. Tsushima, M. Koshiba, Yoshikiyo Hatakeyama, Masafumi Koike, M. Nemoto, K. Nishijima, H. Fujiyasu, Y. Hayato, Y. Kanaya, K. Kaneyuki, Y. Watanabe, D. Kiełczewska, A. L. Stachyra, R. J. Wilkes
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Le résumé fourni par la source
A total of 614 upward through-going muons of minimum energy 1.6 GeV are observed by Super-Kamiokande during 537 detector live days. The measured muon flux is (1.74 ± 0.07(stat.) ± 0.02(sys.)) × 10 −13 cm −2 s −1 sr −1 compared to an expected flux of (1.97 ± 0.44(theo.)) × 10 −13 cm −2 s −1 sr −1 . The absolute measured flux is in agreement with the prediction within the errors. However, the zenith angle dependence of the observed upward through-going muon flux does not agree with no-oscillation predictions. The observed distortion in shape is consistent with the �µ ↔ �� oscillation hypothesis with sin 2 2� > 0.4 and 1 × 10 −3 < �m 2 < 1 × 10 −1 eV 2 at 90 % confidence level.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Scientific Research and DiscoveriesAstrophysics and Cosmic PhenomenaParticle physics theoretical and experimental studies