A 331 Model for Lepton Flavor Universality Violation in $B$ Decays

TL;DR

This paper explores a 331 gauge model with an extended leptonic sector to explain observed lepton flavor universality violations in B meson decays, aiming to match experimental deviations from the Standard Model.

Contribution

It introduces a non-minimal 331 model with five leptonic triplets capable of explaining LFUV in B decays, aligning with global fit scenarios.

Findings

The model can accommodate deviations in $R_{K^{(*)}}$ and $R_{D^{(*)}}$ ratios.

Non-minimal extensions are necessary for explaining experimental anomalies.

The model aligns with model-independent global fit scenarios.

Abstract

Lepton Flavor Universality Violation (LFUV) in $B$ decays in both neutral $b\rightarrow s l^+ l^-$ and charged $b\rightarrow cl\bar{\nu}_{l}$ processes observed in the ratios $R_{K^{(*)}}$ and $R_{D^{(*)}}$ is investigated in the framework of a model based on the extended symmetry gauge $SU(3)_{C}\otimes SU(3)_{L}\otimes U(1)_{X}$ whose leptonic sector consists of five triplets. It is shown that in order to explain the experimentally observed deviations from the Standard Model in these flavor changing transitions, a non-minimal version of the model has to be considered. We investigate the ability of this model in accommodating the model-independent scenarios currently favored by global fits.