Invoking Chiral Vector Leptoquark to explain LFU violation in B Decays

TL;DR

This paper proposes a chiral vector leptoquark model that can simultaneously explain multiple lepton flavor universality violations observed in B meson decays, aligning with recent experimental anomalies.

Contribution

It introduces a chiral vector leptoquark framework that consistently accounts for several LFU violation measurements in B decays, fitting experimental data.

Findings

The model explains the $R_{J/}$ anomaly.

It accounts for $R_{K^{(*)}}$ and $R_{D^{(*)}}$ deviations.

The proposed leptoquark model remains consistent with other constraints.

Abstract

LHCb has recently reported more than $2\sigma$ deviation from the Standard Model prediction in the observable $R_{J/\psi}$. We study this anomaly in the framework of a vector leptoquark along with other lepton flavor universality violating measurements which include $R_{K^{(*)}}$, and $R_{D^{(*)}}$. We show that a chiral vector leptoquark can explain all the aforementioned anomalies consistently while also respecting other experimental constraints.