Fig. 19.

The normalized $\mathrm{t}\overline{\mathrm{t}}$ cross section in the lepton$+$jets channel, as a function of the transverse momentum of the top quark for leptonically decaying top quarks ($t_{\ell }$) (upper), the invariant mass of the $\mathrm{t}\overline{\mathrm{t}}$ system, m($\mathrm{t}\overline{\mathrm{t}}$) (middle), and in bins of number of additional jets (lower) from CMS $\sqrt{s}=13\text{TeV}$ analysis [69]. The data are compared with the predictions of powheg (left) and mg5_amc [FxFx] (right). In both cases, the PS simulation is done with the pythia8 tunes CUETP8M1, CP2, CP4, or CP5. Tunes CP1 and CP3 are not shown in the plot but present a similar behaviour as, respectively, tunes CP2 and CP4. The ratios of simulations to the data (MC/Data) are also shown, where the shaded band indicates the total experimental uncertainty in the data. Vertical lines drawn on the data points refer to the total uncertainty in the data. Vertical lines drawn on the MC points refer to the statistical uncertainty in the predictions. Horizontal bars indicate the associated bin width