Vector Leptoquarks Beyond Tree Level
Javier Fuentes-Martin, Gino Isidori, Matthias K\"onig, Nudzeim, Selimovic

TL;DR
This paper investigates the effects of one-loop corrections in models with massive vector leptoquarks from an $SU(4)$ gauge symmetry, highlighting significant implications for phenomenology and experimental searches.
Contribution
It provides a next-to-leading order analysis of low- and high-energy observables in vector leptoquark models, emphasizing the importance of loop corrections for large gauge couplings.
Findings
One-loop corrections significantly enhance low-energy contributions.
Large gauge couplings lead to sizeable quantum effects.
Results impact current and future leptoquark searches.
Abstract
Models with massive vector leptoquarks, resulting from an gauge symmetry spontaneously broken at the TeV scale, are of great phenomenological interest given the current "anomalies" in semileptonic decays. We analyze the relations between low- and high-energy observables in such class of models to next-to-leading order accuracy in the gauge coupling . For large values of , motivated by recent -physics data, one-loop corrections are sizeable. The main effect is an enhanced contribution at low-energy, at fixed on-shell couplings. This result has important implications for current and future high-energy searches of vector leptoquark models.
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