Triple-leptoquark interactions for tree- and loop-level proton decays

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 $p\to e^{+}{e}^{+}{e}^{-}$ and a one-loop level topology that induces two-body proton decays $p\to {\pi }^0{e}^{+}$ and $p\to {\pi }^{+}\bar{\nu }$. 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.

arXiv comment14 pages, 3 figures; Minor corrections and references added

References in corpus (27)

• Physics of leptoquarks in precision experiments and at particle colliders
• Simultaneous Explanation of $R(D^{(\ast )})$ and $b\to s{\mu }^{+}{\mu }^{-}$: The Last Scalar Leptoquarks Standing
• Closing the window on single leptoquark solutions to the $B$-physics anomalies
• Scalar leptoquarks from GUT to accommodate the $B$-physics anomalies
• On the single leptoquark solutions to the $B$-physics anomalies
• Asymptotic Expansions in Momenta and Masses and Calculation of Feynman Diagrams
• Improved lattice computation of proton decay matrix elements
• Simplified models with baryon number violation but no proton decay
• New Low-energy Leptoquark Interactions
• Low-energy phenomenology of scalar leptoquarks at one-loop accuracy
• Muon $g-2$ and scalar leptoquark mixing
• Leptoquarks: Neutrino masses and accelerator phenomenology
• Two-Loop Neutrino Mass Generation through Leptoquarks
• Leptoquark mechanism of neutrino masses within the grand unification framework
• Proton decay matrix elements with domain-wall fermions
• Inclusive Nucleon Decay Searches as a Frontier of Baryon Number Violation
• A common origin of $R_K$ and neutrino masses
• Proton decay into charged leptons
• Baryon Number Violation Involving Higher Generations
• Neutrino masses and mixing angles from leptoquark interactions
• Complete Lagrangian and Set of Feynman Rules for Scalar Leptoquarks
• Neutrino mass induced radiatively by supersymmetric leptoquarks
• Scalar Leptoquarks, Baryon Number Violation and Pati-Salam Symmetry
• $\Delta L=3$ processes: Proton decay and LHC
• Proton Stability in Leptoquark Models
• Proton decay at 1-loop
• Baryon and Lepton Number Violation with Scalar Bilinears