Low-energy phenomenology of scalar leptoquarks at one-loop accuracy

Abstract

We perform a complete study of the low-energy phenomenology of $S_1$ and $S_3$ lepto-quarks, aimed at addressing the observed deviations in $B$-meson decays and the muon magnetic dipole moment. Leptoquark contributions to observables are computed at one-loop accuracy in an effective field theory approach, using the recently published complete one-loop matching of these leptoquarks to the Standard Model effective field theory. We present several scenarios, discussing in each case the preferred parameter space and the most relevant observables.

25 pages plus appendices, 9 figures, 6 tables. v3: added constraints from high-energy Drell-Yan, version accepted for publication by JHEP