Figure 6

Scaling behaviour as a function $\sqrt{s_{\rm NN}}$ of the width of the charged-particle or -pion rapidity-density distribution with respect to the Landau-Carruthers width (top) and rapidity range (bottom). Charged-pion points from AGS and SPS are adapted from the literature [33], while the PHOBOS (filled crosses) [34] and BRAHMS (open crosses) [30] charged-hadron points are translated from the corresponding d$N_{\rm ch}$/d$\eta$ results.