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arXiv · 1910.13474

Vector Leptoquarks Beyond Tree Level

Javier Fuentes-Martin·Gino Isidori·Matthias König·Nudzeim Selimovic
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Abstract

Models with massive vector leptoquarks, resulting from an $SU(4)$ gauge symmetry spontaneously broken at the TeV scale, are of great phenomenological interest given the current "anomalies" in semileptonic $B$ decays. We analyze the relations between low- and high-energy observables in such class of models to next-to-leading order accuracy in the $SU(4)$ gauge coupling $g_4$. For large values of $g_4$, motivated by recent $B$-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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Javier Fuentes-Martin, Gino Isidori, Matthias König, Nudzeim Selimovic. 2019-10-29. Vector Leptoquarks Beyond Tree Level. https://doi.org/10.1103/physrevd.101.035024

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