Measurement of the flux and zenith-angle distribution of upward through-going muons in kamiokande II + III

S. Hatakeyama, T. Hara, Y. Fukuda, T. Hayakawa, K. Inoue, K. Ishihara, H. Ishino, S. Joukou, T. Kajita, S. Kasuga, Y. Koshio, T. Kumita, K. Matsumoto, M. Nakahata, K. Nakamura, K. Okumura, A. Sakai, M. Shiozawa, J. Suzuki, Y. SuzukiT. Tomoeda, Y. Totsuka, K. S. Hirata, K. Kihara, Y. Oyama, M. Koshiba, K. Nishijima, T. Horiuchi, K. Fujita, M. Koga, T. Maruyama, A. Suzuki, M. Mori, T. Suda, A. T. Suzuki, T. Ishizuka, K. Miyano, H. Okazawa, Y. Nagashima, M. Takita, T. Yamaguchi, Y. Hayato, K. Kaneyuki, T. Suzuki, Y. Takeuchi, T. Tanimori, S. Tasaka, E. Ichihara, S. Miyamoto, K. Nishikawa

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Abstract

The 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 + ± 0.01(stat.)+0.070.06sys.]×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.

Original languageEnglish
Pages (from-to)2016-2019
Number of pages4
JournalPhysical Review Letters
Volume81
Issue number10
DOIs
Publication statusPublished - Sep 7 1998
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Hatakeyama, S., Hara, T., Fukuda, Y., Hayakawa, T., Inoue, K., Ishihara, K., Ishino, H., Joukou, S., Kajita, T., Kasuga, S., Koshio, Y., Kumita, T., Matsumoto, K., Nakahata, M., Nakamura, K., Okumura, K., Sakai, A., Shiozawa, M., Suzuki, J., ... Nishikawa, K. (1998). Measurement of the flux and zenith-angle distribution of upward through-going muons in kamiokande II + III. Physical Review Letters, 81(10), 2016-2019. https://doi.org/10.1103/PhysRevLett.81.2016