Abstract
We study the impact of triple-leptoquark interactions on matter stability for two specific proton decay topologies that arise at the tree- and one-loop level if and when they coexist. We demonstrate that the one-loop level topology is much more relevant than the tree-level one when it comes to the proton decay signatures despite the usual loop-suppression factor. We subsequently present detailed analysis of the triple-leptoquark interaction effects on the proton stability within one representative scenario to support our claim, where the scenario in question simultaneously features a tree-level topology that yields three-body proton decay p → e+e+e− and a one-loop level topology that induces two-body proton decays p → π0e+ and p → π+\( \overline{\nu} \). We also provide a comprehensive list of the leading-order proton decay channels for all non-trivial cubic and quartic contractions involving three scalar leptoquark multiplets that generate triple-leptoquark interactions of our interest, where in the latter case one of the scalar multiplets is the Standard Model Higgs doublet.
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Doršner, I., Fajfer, S. & Sumensari, O. Triple-leptoquark interactions for tree- and loop-level proton decays. J. High Energ. Phys. 2022, 183 (2022). https://doi.org/10.1007/JHEP05(2022)183
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DOI: https://doi.org/10.1007/JHEP05(2022)183