Figure 7

Average transverse momentum in the \pt-range 0--10 \gevc for \xexe collisions at \sqrs = 5.44 \tev (squares) and \pbpb collisions at \sqrs = 5.02 \tev (diamonds) for nine centrality classes (top) and their ratios (bottom). The vertical brackets indicate systematic uncertainties. The hashed areas show results from hydrodynamical calculations by Giacalone et al. .