Angular analysis of $B^0\to K^{\ast 0}{e}^{+}{e}^{-}$ decays

Abstract

An angular analysis of $B^0\to K^{\ast 0}{e}^{+}{e}^{-}$ 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 $B^0\to K^{\ast 0}\hat{I}{¼}^{+}\hat{I}{¼}^{-}$ decays. In general, the angular observables are found to be consistent with the Standard Model expectations as well as with global analyses of other $b\to s{\ell }^{+}{\ell }^{-}$ processes, where $\ell$ is either a muon or an electron. No sign of lepton-flavour-violating effects is observed.

All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://lbfence.cern.ch/alcm/public/analysis/full-details/1628 (LHCb public pages)