Figure 11

Comparison with models of ALICE measurements of ${\rm d}\nch$/${\rm d}\eta$ versus $\eta$ for the INEL event class, at $\sqrt{s} = 0.9$ (left) and 7 TeV (right): ALICE data (black circles with grey band), PYTHIA6 tune Perugia0 (red continuous line), PHOJET (blue dot-dashed line), PYTHIA6 tune Perugia 2011 (pink dashed line), PYTHIA8 4C (green dashed line), EPOS LHC (long dashed light blue line). The lower parts of the figures show ratios of data to simulation. Systematic uncertainties on ratios are indicated by coloured bands.