Fig. 13.

The average values of charged particle scalar $\sum p_{\mathrm{T}}$ density, $⟨\sum p_{\mathrm{T}}/\mathit{\delta }\mathit{\eta }\mathit{\delta }\mathit{\varphi }⟩$, as a function of $Z$-boson transverse momentum, $p_{\mathrm{T}}^{\mathrm{Z}}$, in the transverse, toward and away regions (a), and in the trans-max, trans-min and trans-diff regions (b). The results are plotted at the center of each $p_{\mathrm{T}}^{\mathrm{Z}}$ bin. The error bars depict combined statistical and systematic uncertainties