Figure 3

Deuterons \vtwo\ measured in \PbPb collisions at \snn = 5.02 TeV (red square) compared to that measured at \snn = 2.76 TeV  (light blue circles) for two centrality intervals (10--20\% and 40--50\%). Both protons and deuteron elliptic flow were measured for pseudorapidity gap between the particle of interest and the reference flow particle $|\Delta \eta| >$ 0.9. Vertical bars and boxes represent the statistical and systematic uncertainties, respectively.