Figure 9

Comparison of the $R_{\rm out}/R_{\rm side}$ ratio, as a function of pair transverse momentum, with the calculation from the Therminator and (3+1)D hydro model , for 0--5\% centrality in panel (a) and 50--60\% centrality in panel (b). The comparison to the HKM model  is also shown for the central data. Closed symbols are experimental data (with statistical and systematic uncertainty), bands and dashed lines are the model calculations.