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This paper presents combinations of inclusive and differential measurementsof the charge asymmetry ($A_{\mathrm{C}}$) in top quark pair($\mathrm{t}\overline{\mathrm{t}}$) events with a lepton+jets signature by theATLAS and CMS Collaborations, using data from LHC proton-proton collisions atcentre-of-mass energies of 7 and 8 TeV corresponding to integrated luminositiesof about 5 and 20 fb$^{-1}$ for each experiment, respectively. The resultingcombined LHC measurements of the inclusive charge asymmetry are$A_{\mathrm{C}}^{\mathrm{LHC7}} = 0.005 \pm0.007 \text{ (stat)}\pm0.006 \text{(syst)}$ at 7 TeV and $A_{\mathrm{C}}^{\mathrm{LHC8}} = 0.0055 \pm0.0023\text{(stat)}\pm0.0025\text{ (syst)}$ at 8 TeV. These values, as well as thecombination of $A_{\mathrm{C}}$ measurements as a function of the invariantmass of the $\mathrm{t}\overline{\mathrm{t}}$ system at 8 TeV, are consistentwith the respective standard model predictions.

Combination of inclusive and differential  $\mathrm{t}\overline{\mathrm{t}}$ charge asymmetry measurements using ATLAS  and CMS data at $\sqrt{s} =$ 7 and 8 TeV