Angular analysis of the decay
arXiv:2504.06346 · doi:10.1007/JHEP07(2025)069
Abstract
An angular analysis of the decay is presented, using proton-proton collision data collected with the LHCb detector between 2011 and 2018 at centre-of-mass energies of 7, 8 and 13. The combined dataset corresponds to an integrated luminosity of . Observables are determined by fitting time-integrated projections of the angular distribution in three bins of dielectron mass squared, , corresponding to , and . The results are compatible with predictions based on the Standard Model of particle physics.
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/4317/ (LHCb public pages)