Abstract
A total of 614 upward throughgoing muons of minimum energy 1.6 GeV are observed by Super-Kamiokande during 537 detector live days. The measured muon flux is compared to an expected flux of . The absolute measured flux is in agreement with the prediction within the errors. However, the zenith-angle dependence of the observed upward throughgoing muon flux does not agree with no-oscillation predictions. The observed distortion in shape is consistent with the oscillation hypothesis with and at 90% confidence level.
- Received 8 December 1998
DOI:https://doi.org/10.1103/PhysRevLett.82.2644
©1999 American Physical Society