Neutral current B-decay anomalies

TL;DR

This paper analyzes recent deviations in $b o s \, \ell^+\ell^-$ decays from Standard Model predictions, exploring their implications and consistency within a model-independent framework, highlighting updated experimental results and potential new physics effects.

Contribution

It provides a comprehensive, model-independent analysis of recent experimental anomalies in neutral B-decays, assessing their compatibility and implications for new physics.

Findings

Updated measurements show deviations from Standard Model predictions.

Certain observables suggest potential signs of new physics.

Compatibility analysis indicates some anomalies could be explained by new physics models.

Abstract

We discuss the implications of $b \to s \ell^+\ell^-$ measurements and their deviations with respect to the Standard Model predictions in a model-independent framework. We highlight in particular the impact of the recent updated measurements including the updated $B_s \to \phi \mu^+\mu^-$ branching ratios and angular observables, the recent CMS measurement of the branching ratio of $B_s\to\mu^+ \mu^-$, and the LHCb measured lepton flavour universality violating ratios $R_{K_S^0}$ and $R_{K^{*+}}$. In addition, we check the compatibility of the new physics effect for the theoretically clean observables with the rest of the neutral $B$ decays observables.