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Measurements of the top--antitop quark pair production charge asymmetry inthe dilepton channel, characterized by two high-${p}_{\rm{T}}$ leptons(electrons or muons), are presented using data corresponding to an integratedluminosity of 20.3 $\textrm{fb}^{-1}$ from $pp$ collisions at a center-of-massenergy $\sqrt{s} = 8$~TeV collected with the ATLAS detector at the Large HadronCollider at CERN. Inclusive and differential measurements as a function of theinvariant mass, transverse momentum, and longitudinal boost of the $t\bar{t}$system are performed both in the full phase space and in a fiducial phase spaceclosely matching the detector acceptance. Two observables are studied:$A_C^{\ell \ell}$ based on the selected leptons and $A_C^{t\bar{t}}$ based onthe reconstructed $t\bar{t}$ final state. No significant deviation from theStandard Model expectations is observed.

Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at $\sqrt{s}=8$ TeV with the ATLAS detector