Phys. Rev. Lett. 81, 2016–2019 (1998)Measurement of the Flux and Zenith-Angle Distribution of Upward Through-Going Muons in Kamiokande II+IIIReceived 2 June 1998; published in the issue dated 7 September 1998 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±0.10(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. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.2016
DOI:
10.1103/PhysRevLett.81.2016
PACS:
14.60.Pq, 96.40.Tv
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