Abstract
Using light-cone sum rule techniques, we estimate the form factors which parametrise the hadronic matrix elements that are relevant for semi-leptonic three-body proton decays. The obtained form factors allow us to determine the differential rate for the decay of a proton (p) into a positron (e+), a neutral pion (π0) and a graviton (G), which is the leading proton decay channel in the effective theory of gravitons and Standard Model particles (GRSMEFT). The sensitivity of existing and next-generation neutrino experiments in detecting the p → e+π0G signature is studied and the phenomenological implications of our computations for constraints on the effective mass scale that suppresses the relevant baryon-number violating GRSMEFT operator are discussed.
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Haisch, U., Hala, A. Semi-leptonic three-body proton decay modes from light-cone sum rules. J. High Energ. Phys. 2021, 144 (2021). https://doi.org/10.1007/JHEP11(2021)144
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DOI: https://doi.org/10.1007/JHEP11(2021)144