# Search for Proton Decay through p --> ν̄K + in a Large Water Cherenkov Detector

@article{Hayato1999SearchFP,
title={Search for Proton Decay through p --> $\nu$̄K + in a Large Water Cherenkov Detector},
author={Super-Kamiokande Collaboration Y. Hayato and Matthew Earl and et.al.},
journal={Physical Review Letters},
year={1999},
volume={83},
pages={1529-1533}
}
• Published 1999
• Physics
• Physical Review Letters
We present results of a search for proton decays, $p \to \bar{\nu} K^+$, using data from a 33 kton$\cdot$year exposure of the Super-Kamiokande detector. Two decay modes of the kaon, $K^+ \to \mu^+ \nu_{\mu}$ and $K^+ \to \pi^+ \pi^0$, were studied. The data were consistent with the background expected from atmospheric neutrinos; therefore a lower limit on the partial lifetime of the proton $\tau / B(p \to \bar{\nu} K^+)$ was found to be $6.7 \times 10^{32}$ years at 90% confidence level.
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