Muon $g-2$ in $U(1)_{\mu-\tau}$ Symmetric Gauged Radiative Neutrino Mass Model

TL;DR

This paper investigates the muon g-2 anomaly within a radiative neutrino mass model featuring a gauged U(1)_{μ-τ} symmetry, highlighting a Yukawa sector contribution and identifying parameter regions consistent with experimental data.

Contribution

It introduces a novel scotogenic neutrino model where the muon g-2 is primarily affected by Yukawa interactions rather than gauge sectors, with detailed numerical analysis.

Findings

Model favors normal neutrino mass hierarchy.

Achieves muon g-2 at the best fit value of 25.1×10^{-10}.

Provides a benchmark point consistent with experimental data.

Abstract

We explore muon anomalous magnetic moment (muon $g-2$) in a scotogenic neutrino model with a gauged lepton number symmetry $U(1)_{\mu-\tau}$. In this model, a dominant muon $g-2$ contribution comes not from an additional gauge sector but from a Yukawa sector. In our numerical $\Delta \chi^2$ analysis, we show that our model is in favor of normal hierarchy with some features. We demonstrate one benchmark point, satisfying muon $g-2$ at the best fit value $25.1\times10^{-10}$.