Angular analysis of $B^0\rightarrow K^{*0}e^{+}e^{-}$ decays

TL;DR

This paper presents an angular analysis of B0 to K*0 e+ e- decays using LHCb data, testing lepton flavor universality and finding results consistent with the Standard Model.

Contribution

It provides the first detailed angular analysis of B0 to K*0 e+ e- decays at multiple energies, testing lepton flavor universality with new data.

Findings

Results are consistent with Standard Model predictions.

No evidence of lepton-flavor violation was observed.

Angular observables agree with previous measurements in muon channels.

Abstract

An angular analysis of $B^0\rightarrow K^{*0}e^{+}e^{-}$ decays is presented using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb$^{-1}$. The analysis is performed in the region of the dilepton invariant mass squared of 1.1-6.0 GeV$^{2}/c^{4}$. In addition, a test of lepton flavour universality is performed by comparing the obtained angular observables with those measured in $B^0\rightarrow K^{*0}\mu^{+}\mu^{-}$ decays. In general, the angular observables are found to be consistent with the Standard Model expectations as well as with global analyses of other $b \rightarrow s \ell^{+} \ell^{-}$ processes, where $\ell$ is either a muon or an electron. No sign of lepton-flavour-violating effects is observed.