Leptoquark models for the $B$-physics anomalies

TL;DR

This paper proposes a leptoquark model with light right-handed neutrinos to explain anomalies in B-meson decays observed at LHCb, BaBar, and Belle, and discusses testable predictions and recent experimental findings.

Contribution

It introduces a novel leptoquark model that simultaneously explains multiple B-physics anomalies and makes predictions for future experimental tests.

Findings

The model accommodates observed deviations in $R_K$ and $R_{D^{(*)}}$.

Predictions for $R_{K^ ext{*}}$ deviations at LHCb.

Discussion of testable implications for ongoing experiments.

Abstract

The $B$-physics experiments at LHCb, BaBar and Belle hint towards deviations from Lepton Flavor Universality in both the tree-level and loop-induced $B$ meson semileptonic decays. We propose a leptoquark model with light right-handed neutrinos which can accommodate both $R_K^\mathrm{exp}<R_K^\mathrm{SM}$ and $R_{D^{(\ast)}}^\mathrm{exp}>R_{D^{(\ast)}}^\mathrm{SM}$. We discuss several of its predictions which can be tested in modern day experiments. We also comment on the recent finding at LHCb, namely $R_{K^\ast}^{\mathrm{exp}}<R_{K^\ast}^\mathrm{SM}$.