New physics facing LFU and LFV tests in B physics

TL;DR

This paper reviews recent anomalies in B meson decays suggesting possible violations of lepton flavor universality and explores leptoquark models as potential explanations, highlighting both model-independent features and specific scenarios.

Contribution

It provides a comprehensive overview of LFU and LFV tests in B physics, analyzing model-independent aspects and proposing leptoquark scenarios to explain current anomalies.

Findings

Evidence of LFU violation in $R_K$ and $R_{D^{(*)}}$ measurements

Leptoquark models can accommodate current experimental anomalies

Discussion of model-independent features of LFU and LFV in B decays

Abstract

Lepton flavor universality in the Standard Model and hints of its violation in neutral ($R_K$) and charged currents $(R_{D^{(*)}})$ in $B$ decays are presented. We discuss model independent features as well as several leptoquark scenarios which are well suited to fit current values of $R_K$ and/or $R_{D^{(*)}}$.