Speaker
Description
Same- and opposite-sign charge asymmetries are measured in top-quark pair events in which a b-hadron decays semileptonically to a muon, using data corresponding to an integrated luminosity of 139 fb−1 from proton–proton collisions at a centre-of-mass energy of √s = 13TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. The charge asymmetries are based on the charge of the lepton from the top-quark decay and the charge of the muon from the semileptonic decay of a b-hadron and are measured in a fiducial region corresponding to the experimental acceptance. The measurement investigates the excess over the Standard Model reported by the D0 experiment and looks to improve upon the statistically limited √s = 8TeV measurements made at ATLAS using the full Run 2 dataset and new analysis techniques.
