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Title: Does the proton decay to an antineutrino and a kaon?
Plain: Supersymmetric unified theories favor a different decay of the proton, into an antineutrino and a charged kaon. Detecting the kaon needs detectors with good tracking.
Precise: Measure or bound tau(p -> anti-nu K+)/B, currently $> \sim 5.9e33\,\mathrm{yr}$ (Super-Kamiokande, 2014). Minimal SUSY $\mathrm{SU}(5)$ with dimension-5 operators predicts values near or below this; an answer is a detection or a limit $\sim 1e34\text{ to }1e35\,\mathrm{yr}$.
Settled by: DUNE liquid-argon tracking, Hyper-Kamiokande and JUNO searches for p -> anti-nu K+.
Kind: well-posed
Answer type: yes-no
References: (empty)
Literature status: open
Status note: (empty)
Posed since: 1982