Radiative neutrino masses, lepton flavor mixing and muon $g-2$ in a leptoquark model

TL;DR

This paper introduces a leptoquark model that simultaneously explains neutrino masses, lepton flavor mixing, and the muon g-2 anomaly, aligning with experimental data and decay constraints through specific Yukawa textures.

Contribution

It proposes a novel leptoquark model with specific scalar particles and textures that accounts for multiple phenomena in particle physics.

Findings

Successfully explains muon g-2 anomaly.

Reproduces neutrino oscillation data.

Satisfies charged lepton decay constraints.

Abstract

We propose a leptoquark model with two scalar leptoquarks $S^{}_1 \left( \bar{3},1,\frac{1}{3} \right)$ and $\widetilde{R}^{}_2 \left(3,2,\frac{1}{6} \right)$ to give a combined explanation of neutrino masses, lepton flavor mixing and the anomaly of muon $g-2$, satisfying the constraints from the radiative decays of charged leptons. The neutrino masses are generated via one-loop corrections resulting from a mixing between $S^{}_1$ and $\widetilde{R}^{}_2$. With a set of specific textures for the leptoquark Yukawa coupling matrices, the neutrino mass matrix possesses an approximate $\mu$-$\tau$ reflection symmetry with $\left( M^{}_\nu \right)^{}_{ee} = 0$ only in favor of the normal neutrino mass ordering. We show that this model can successfully explain the anomaly of muon $g-2$ and current experimental neutrino oscillation data under the constraints from the radiative decays of charged leptons.