Figure 10

Projections of $R_2^{\rm (CI)}$ and $P_2^{\rm (CI)}$ correlation functions, measured in \PbPb\ collision at $\sqrt{s_{NN}} = 2.76$ TeV, for selected ranges of collisioncentrality. Projections onto the $\Delta\eta$ axis are calculated as averages of the two-dimensional correlations in the range $|\Delta \varphi| \le \pi$. Vertical bars and shaded areas represent statistical and systematic uncertainties, respectively.