Figure 7

Neutral pion nuclear modification factor $R_{\rm{AA}}$ for three different centralities ($0-5\%$, $20-40\%$, $60-80\%$) in Pb-Pb collisions at $\snn =  2.76 {TeV}$. Vertical error bars reflect statistical uncertainties, boxes systematic uncertainties. Horizontal bars reflect the bin width. The boxes around unity reflect the uncertainty of the average nuclear overlap function ($T_{AA}$) and the normalization uncertainty of the pp spectrum added in quadrature.