Related paper Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV ALICE (circles) results from $\snn =2.76$ TeV $\pbpb$ collisions compared with STAR and PHENIX results for $\snn$ = 200 GeV Au - Au collisions. Left panel: the proton-to-pion ratio. Right panel: the kaon-to-pion ratio.[png] [pdf]