# Impact of leptoquarks in semileptonic B decays

## TL;DR

This paper investigates how vector leptoquarks could explain recent anomalies in semileptonic B meson decays, constraining their couplings with existing data and exploring their potential to simultaneously address multiple observed discrepancies.

## Contribution

It provides a comprehensive analysis of vector leptoquark effects on B decay anomalies, constrains their parameters with current data, and assesses their ability to explain multiple anomalies simultaneously.

## Key findings

- Leptoquark couplings are constrained by B decay data.
- Predicted branching ratios align with observed anomalies.
- Potential for simultaneous explanation of R_D(*) and R_K anomalies.

## Abstract

We study the impact of vector leptoquarks on the recent anomalies in semileptonic $B$ meson decays such as $R_K$ and $R_{D^{(*)}}$ etc. We constrain the leptoquark couplings by using the existing data on the branching ratios of $B_s \to l^+ l^-$ and $\bar{B} \to X_s l^+ l^-$ processes, where $l=e,\mu,\tau$. We estimate the branching ratios of $\bar B \to D^{(*)} l \bar \nu_l$ processes using the constrained leptoquark parameter space. We also investigate the possibility of simultaneous explanation of $R_{D^{(*)}}$, $R_K$ anomalies in this model.