Fig. 20.

Charged-particle density at $\sqrt{s}=7\text{TeV}$ for particles with $p_{\mathrm{T}}>0.5\text{GeV}$ and $|\mathit{\eta }|<0.8$ in the TransMIN (top), TransMAX (middle), and TransDIF (bottom) regions, as defined by the leading charged particle, as a function of the leading charged-particle $p_{\mathrm{T}}^{\max }$. The data are compared to pythia6 using CUETP$6$S$1$-CTEQ$6$L1, to pythia8 using CUETP$8$S$1$-CTEQ$6$L1, CUETP$8$S$1$-HERAPDF1.5LO, and CUETP$8$M$1$, and to herwig++ using CUETHppS$1$. Also shown are the predictions (left) based on the CMS UE tunes at $13\text{TeV}$ (dashed lines), and the ratio of the $13\text{TeV}$ to $7\text{TeV}$ results for the five tunes (right)