Fig. 22.

Comparison with the measurement [71, 72] of the inclusive jet multiplicity in Z $+$jets (upper) and W $+$jets (lower) events predicted by mg5_amc $+$ pythia8 with $k_{\mathrm{T}}$–MLM merging (left) and FxFx merging (right) for the different tunes. 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