A complete basis of dimension-9 operators for three-lepton nucleon decays is constructed, matched to chiral perturbation theory, and constrained by experimental limits.
Search for Trilepton Nucleon Decay via $p \rightarrow e^+ \nu \nu$ and $p \rightarrow \mu^+ \nu \nu$ in the Super-Kamiokande Experiment
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abstract
The trilepton nucleon decay modes $p \rightarrow e^+ \nu \nu$ and $p \rightarrow \mu^+ \nu \nu$ violate $|\Delta (B - L)|$ by two units. Using data from a 273.4 kiloton year exposure of Super-Kamiokande a search for these decays yields a fit consistent with no signal. Accordingly, lower limits on the partial lifetimes of $\tau_{p \rightarrow e^+ \nu \nu} > 1.7 \times 10^{32}$ years and $\tau_{p \rightarrow \mu^+ \nu \nu} > 2.2 \times 10^{32}$ years at a $90 \% $ confidence level are obtained. These limits can constrain Grand Unified Theories which allow for such processes.
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hep-ph 2years
2025 2verdicts
UNVERDICTED 2representative citing papers
Bounds on nucleon decays to three leptons are obtained from dim-6 LEFT Wilson coefficients constrained by two-body BNV limits, yielding results several orders of magnitude different from prior phase-space estimates for Δ(B-L)=0 modes.
citing papers explorer
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Nucleon decays into three leptons: contact contributions
A complete basis of dimension-9 operators for three-lepton nucleon decays is constructed, matched to chiral perturbation theory, and constrained by experimental limits.
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Nucleon decays into three leptons: Noncontact contributions
Bounds on nucleon decays to three leptons are obtained from dim-6 LEFT Wilson coefficients constrained by two-body BNV limits, yielding results several orders of magnitude different from prior phase-space estimates for Δ(B-L)=0 modes.