Vector leptoquarks beyond tree level

• DOI: 10.1103/physrevd.101.035024
• Publication Date: 2020-02-21T16:07:31Z
• Authors: Javier Fuentes-Ma...; Gino Isidori; Matthias König; Nudžeim Selimović
• Keywords: High Energy Physics - Phenomenology; High Energy Physics - Phenomenology (hep-ph); Physics and Astronomy (miscellaneous); 530 Physics; 0103 physical sciences; FOS: Physical sciences; 10192 Physics Institute; 3101 Physics and Astronomy (miscellaneous); 01 natural sciences

5 pages, 1 figure<br/>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.<br/>