Fig. 5.

Distributions of the scalar $p_{\mathrm{T}}$ sum density of charged particles, $\sum p_{\mathrm{T}}/\mathit{\delta }\mathit{\eta }\mathit{\delta }\mathit{\varphi }$, in three different $Z$-boson transverse momentum, $p_{\mathrm{T}}^{\mathrm{Z}}$, intervals, in the toward (a) and transverse (b) regions. The error bars depict combined statistical and systematic uncertainties