Figure 2

Normalized spectra ratios as a function of the transverse momentum in \PbPb collisions at \fivenn. Results are shown for centrality estimators based on \nch (top left), \et (top right), \ntracklets (bottom left) within $0.5 \leq |\eta| \leq 0.8$, and \nch within $-3.7\eta-1.7$ and $2.8 \eta 5.1$ (bottom right). Each panel displays normalized ratios for selected centrality classes. The centrality percentile legend in the bottom left panel applies to midrapidity estimators, while the legend in the bottom right panel applies to the forward estimator. Error bars represent statistical uncertainties. Systematic uncertainties, which are largely canceled due to their common origin in both the numerator and denominator, are not shown.