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

TL;DR

This paper analyzes the low-energy effects of scalar leptoquarks $S_1$ and $S_3$ at one-loop level, aiming to explain anomalies in B-meson decays and muon magnetic moments using effective field theory.

Contribution

It provides a comprehensive one-loop analysis of scalar leptoquarks' phenomenology, including complete matching to the Standard Model effective field theory.

Findings

Identifies parameter regions addressing B-meson decay anomalies.

Highlights leptoquark contributions to muon magnetic dipole moment.

Proposes scenarios consistent with experimental data.

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.