Figure 4

The $I_{X}^{\rm t}$ (left) and $I_{X}^{\rm a}$ (right) as a function of $\langle N_{\rm ch}^{\rm T} \rangle$ in 4 $< p_{\rm T} < $ 6 GeV/$c$ for different multiplicity classes in pp, p$-$Pb and Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV. Pb$-$Pb results are shown assuming a flat background (filled markers), and assuming a $v_{2}$-modulated background (empty markers). The statistical and systematic uncertainties are shown by bars and boxes, respectively.