Measurement of the Flux and Zenith-Angle Distribution of Upward Through-Going Muons in Kamiokande II+III
1998; American Physical Society; Volume: 81; Issue: 10 Linguagem: Inglês
10.1103/physrevlett.81.2016
ISSN1092-0145
AutoresS. Hatakeyama, T. Hara, Y. Fukuda, T. Hayakawa, K. Inoue, K. Ishihara, H. Ishino, S. Joukou, T. Kajita, S. Kasuga, Y. Koshio, T. Kumita, Koji Matsumoto, M. Nakahata, K. Nakamura, K. Okumura, Akito Sakai, M. Shiozawa, J. Suzuki, Y. Suzuki, T. Tomoeda, Y. Totsuka, Keiko Hirata, K. Kihara, Y. Oyama, M. Koshiba, K. Nishijima, Takashi Horiuchi, K. Fujita, M. Koga, T. Maruyama, Y. Suzuki, M. Mori, T. Suda, Y. Suzuki, T. Ishizuka, K. Miyano, H. Okazawa, Y. Nagashima, M. Takita, Tomohiro Yamaguchi, Y. Hayato, K. Kaneyuki, T. Suzuki, Y. Takeuchi, T. Tanimori, S. Tasaka, E. Ichihara, Seigo Miyamoto, K. Nishikawa,
Tópico(s)Particle physics theoretical and experimental studies
ResumoThe flux of upward through-going muons of minimum (mean) threshold energy >1.6 (3.0) GeV is measured, based on a total of 372 events observed by the Kamiokande II+III detector during 2456 detector live days. The observed muon flux was Φobs=[1.94±0.10(stat.)−0.06+0.07sys.)]×10−13cm−2s−1sr−1, which is compared to an expected value of Φtheo=[2.46±0.54(theo.)]×10−13cm−2s−1sr−1. The observation is in agreement with the prediction within the errors. The zenith-angle dependence of the observed upward through-going muons supports the previous indication of neutrino oscillations made by Kamiokande using sub- and multi-GeV atmospheric neutrino events.Received 2 June 1998DOI:https://doi.org/10.1103/PhysRevLett.81.2016©1998 American Physical Society
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