Figure 4

The normalized ψ(2S) yield and the ratio of normalized ψ(2S)-over-J/ ψ yields at 2.03 < ycms < 3.53 as a function of the normalized charged-particle pseudorapidity density in p–Pb collisions at √sNN = 8.16 TeV. Measurements are compared with the percolation calculation [53] coupled with comover model [5] and EPS09 nPDF [58]. Quoted is the correlated event-class normalization uncertainty