Combined explanations of $B$-physics anomalies, $(g-2)_{e, \mu}$ and neutrino masses by scalar leptoquarks

TL;DR

This paper proposes a model extending the Standard Model with TeV-scale scalar leptoquarks to simultaneously explain neutrino masses, B-physics anomalies, and lepton magnetic moments, while satisfying various experimental constraints.

Contribution

It introduces a specific leptoquark model with detailed Yukawa textures that unifies explanations for multiple anomalies and neutrino oscillations.

Findings

The model successfully fits B-physics anomalies and neutrino data.

It constrains leptoquark Yukawa matrices to satisfy flavor violation limits.

The analysis identifies viable parameter space for the proposed leptoquark textures.

Abstract

We extend the contents of the standard model (SM) by introducing TeV-scale scalar leptoquarks to generate neutrino masses and explain some current observed deviations from the SM predictions, including the anomalous magnetic moments of charged leptons (electron and muon) and $B$-physics anomalies ($R_{K^{(*)}}$ and $R_{D^{(*)}}$). The model consists of $\text{SU}(2)_L$ singlet leptoquark $S_1\sim (\bar{3}, 1, 1/3)$, doublet leptoquark $\tilde{R}_2\sim (3, 2, 1/6)$ and triplet leptoquark $S_3\sim (\bar{3}, 3, 1/3)$. We combine the constraints arising from the low-energy lepton flavor violation, meson decay and mixing observables. We perform a detailed phenomenological analysis and identify the minimized texture of leptoquark Yukawa matrices to accommodate a unified explanation of the anomalies and neutrino oscillation data.