Dinucleon and Nucleon Decay to Two-Body Final States with no Hadrons in Super-Kamiokande

Abstract

Using 0.37 megaton$\cdot$years of exposure from the Super-Kamiokande detector, we search for 10 dinucleon and nucleon decay modes that have a two-body final state with no hadrons. These baryon and lepton number violating modes have the potential to probe theories of unification and baryogenesis. For five of these modes the searches are novel, and for the other five modes we improve the limits by more than one order of magnitude. No significant evidence for dinucleon or nucleon decay is observed and we set lower limits on the partial lifetime of oxygen nuclei and on the nucleon partial lifetime that are above $4\times 10^{33}$ years for oxygen via the dinucleon decay modes and up to about $4\times 10^{34}$ years for nucleons via the single nucleon decay modes.

Cited by in corpus (10)

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• GUT Physics in the era of the LHC
• Baryon-Number-Violating Nucleon and Dinucleon Decays in a Model with Large Extra Dimensions
• Improved search for invisible modes of nucleon decay in water with the SNO+ detector
• Improved Upper Limits on Baryon-Number Violating Dinucleon Decays to Dileptons
• Processes that break baryon number by two units and the Majorana nature of the neutrino
• $\Delta B=2$ neutron decay into antiproton mode $n\to \bar{p}{e}^{+}\nu (\bar{\nu })$
• Simple models with both baryon and lepton number violation by two units
• Connection between $\nu n\to \bar{\nu }\bar{n}$ reactions and $n$-$\bar{n}$ oscillations via additional Higgs triplets
• Baryon number non-conservation as Peccei-Quinn mechanism