Lepton non-universality in $B$-decays in the minimal leptoquark gauge model

TL;DR

This paper reviews the potential for explaining B-decay anomalies using a minimal leptoquark gauge model based on the $SU(4)_C imes SU(2)_L imes U(1)_R$ symmetry, assessing its viability without extensive model complexity.

Contribution

It provides an analysis of how well a minimal leptoquark gauge model can account for B-decay anomalies, contrasting with more elaborate models.

Findings

Identifies the parameter space where the minimal model can explain anomalies.

Highlights limitations of the minimal model in fully accounting for all anomalies.

Suggests future experimental tests to validate the model's predictions.

Abstract

The anomalies in semileptonic $B$-decays are often attributed to new physics scenarios featuring leptoquark degrees of freedom. Attempts to accommodate all the deviations at once usually result in an elaborate model building way beyond the minimal scenarios containing the desired degrees of freedom. However, as it is far from clear whether all these signals (if any) survives the future experimental scrutiny, in this contribution we decided to take the opposite standpoint and review the actual room available for various $B$-decay anomalies within the very minimal low-energy leptoquark gauge model based on the $SU(4)_{C}\otimes SU(2)_{L}\otimes U(1)_{R}$ symmetry group.