Measured nuclear modification factor for the \pai (empty symbols) and \e meson (full symbols) in the (a) 0--10\% and (b) 20--50\% centrality classes, compared to ALICE $\pi^{\pm}$ and $K^{\pm}$  (open and full diamonds) in the same centrality classes. The boxes around unity represent quadratic sum of the uncertainty on $\langle \TAA \rangle$ and on the pp spectrum normalization uncertainty.