Figure 2

Charged-particle pseudorapidity density at midrapidity normalized to the number of participants,calculated with the Glauber model,for p-Pb, p-Au and d-Au collisions as a function of $\snn$, comparedto NSD ,and inelastic pp ($\ppbar$) collisions,as well as central heavy-ion collisions The curves $\propto s_{\rm NN}^{0.11}$ and $s_{\rm NN}^{0.15}$ (from ) are superimposedon the NSD pp ($\ppbar$) and central heavy-ion data, respectively, while$\propto s_{\rm NN}^{0.10}$ (from ) on the inelastic pp ($\ppbar$) data.