A closer look at isodoublet vector leptoquark solution to $R_{D^{(*)}}$ anomaly

TL;DR

This paper explores a vector leptoquark model to explain anomalies in B-meson decays, highlighting its phenomenological implications and potential for future experimental tests at colliders.

Contribution

It introduces a SU(2)_L doublet vector leptoquark model that accounts for B decay anomalies and discusses its testable predictions in upcoming experiments.

Findings

Scalar operators favored for explaining deviations

Model predicts observable effects in B_s→ττ and B→Kττ decays

High-pT di-τ signatures at LHC can probe the model

Abstract

We discuss a model with a SU$(2)_L$ doublet vector leptoquark (LQ), motivated by the recent experimental results relating to the lepton universality of $\overline{B} \to D^{(*)} \tau \overline{\nu}_\tau$. We find that scalar operators predicted by the LQ are favored to explain the deviations, taking into account the recent LHCb result. We investigate the extensive phenomenology of the model and conclude that $B_s\to\tau \overline\tau$, $B\to K\tau\overline\tau$, $B_u\to \tau\overline \nu_\tau$ and high-$p_T$ di-$\tau$ lepton signatures at the LHC will probe the interesting parameter region in the near future.