Evidence for oscillation of atmospheric neutrinos

@inproceedings{Collaboration1998EvidenceFO,
  title={Evidence for oscillation of atmospheric neutrinos},
  author={The Super-Kamiokande Collaboration and Y. Fukuda et al},
  year={1998}
}
We present an analysis of atmospheric neutrino data from a 33.0 kiloton-year (535-day) exposure of the Super–Kamiokande detector. The data exhibit a zenith angle dependent deficit of muon neutrinos which is inconsistent with expectations based on calculations of the atmospheric neutrino flux. Experimental biases and uncertainties in the prediction of neutrino fluxes and cross sections are unable to explain our observation. The data are consistent, however, with two-flavor ν µ ↔ ν τ oscillations… 

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