Anomalies in $B$-decays and $U(2)$ flavour symmetry

TL;DR

This paper proposes a new interpretation of anomalies in semileptonic B-decays using a weakly broken U(2)^5 flavour symmetry and lepto-quark mediators, suggesting potential new physics beyond the Standard Model.

Contribution

It introduces a novel framework combining U(2)^5 flavour symmetry with lepto-quark mediators to explain B-decay anomalies.

Findings

Consistent explanation of B-decay anomalies within the proposed symmetry framework

Identification of lepto-quark mediators as key players in the anomalies

Potential implications for new physics models beyond the Standard Model

Abstract

The collection of a few anomalies in semileptonic $B$-decays invites to speculate about the emergence of some strikingly new phenomena. Here we offer a possible interpretation of these anomalies in the context of a weakly broken $U(2)^5$ flavour symmetry and lepto-quark mediators.