Tests of Lepton Flavour Universality with $b \rightarrow s\ell \ell$ transitions at LHCb

TL;DR

This paper reviews recent LHCb results testing lepton flavour universality through semileptonic $b ightarrow s\,ell \,ell$ decays, which are sensitive probes for potential new physics beyond the Standard Model.

Contribution

It summarizes recent experimental findings from LHCb that investigate potential violations of lepton flavour universality in $b ightarrow s\ell \ell$ transitions.

Findings

Evidence of deviations from Standard Model predictions in certain decay channels.

Constraints on new physics models from measured branching fractions and angular distributions.

Confirmation of lepton flavour universality in some decay modes.

Abstract

Semileptonic $b \rightarrow s\ell \ell$ processes constitute a good probe for new physics phenomena: new particles contributing to the loops could affect branching fractions and angular distributions, and have different couplings to different lepton families, thus violating lepton flavour universality. Recent results from the LHCb experiment are reviewed.