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arXiv · hep-ex/9904020

Search for proton decay through p->\barν K^+ in a large water Cherenkov detector

Kamiokande Collaboration·Y. Hayato·M. Earl
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Abstract

We present results of a search for proton decays, $p \to \barν K^+$, using data from a 33 kton$\cdot$year exposure of the Super-Kamiokande detector. Two decay modes of the kaon, $K^+ \to μ^+ ν_μ$ and $K^+ \to π^+ π^0$, were studied. The data were consistent with the background expected from atmospheric neutrinos; therefore a lower limit on the partial lifetime of the proton $τ/ B(p \to \barν K^+)$ was found to be $6.7 \times 10^{32}$ years at 90% confidence level.

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Kamiokande Collaboration, Y. Hayato, M. Earl. 1999-04-21. Search for proton decay through p->\barν K^+ in a large water Cherenkov detector. https://doi.org/10.1103/physrevlett.83.1529

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