Аннотация:An analysis of the angular distribution of the decay Λ0b→Λμ+μ− is presented, using data collected with the LHCb detector between 2011 and 2016 and corresponding to an integrated luminosity of approximately 5fb−1. Angular observables are determined using a moment analysis of the angular distribution at low hadronic recoil, corresponding to the dimuon invariant mass squared range 15<q2<20GeV2/c4. The full basis of observables is measured for the first time. The lepton-side, hadron-side and combined forward-backward asymmetries of the decay are determined to be
AlFBAhFBAlhFB=−0.39±0.04stat±0.01syst,=−0.30±0.05stat±0.02syst,=+0.25±0.04stat±0.01syst.
The measurements are consistent with Standard Model predictions.