Differential measurements of the charge asymmetry in top quark pair production

The difference in angular distributions between top quarks and antiquarks, commonly referred to as the charge asymmetry, is measured in a dataset corresponding to an integrated luminosity of $4.7\,\mathrm{fb}^{-1}$, collected with the CMS detector at the LHC. In addition to the inclusive measurement, for the first time at the LHC also differential measurements of the charge asymmetry are performed. The invariant mass, the rapidity, and the transverse momentum of the ${\rm t{\bar t}}$ system are sensitive to the different processes contributing to the overall charge asymmetry and are therefore chosen as differentiating variables. The measured inclusive asymmetry of $A_{C} = 0.004 \pm 0.010(\mathrm{stat.})\,\pm 0.012~(\mathrm{syst.})$ and the measured differential asymmetries are consistent with the predictions from the standard model.