Figure 13

(a): Ratio p/$Phi$ as a function of $\pt$ for Pb-Pb collisions at $\snn$ = 2.76 TeV for four centrality intervals. (b): Ratios of p and $\Phi$ yields to charged pions as a function of $\pt$ for central Pb-Pb collisions at $\snn$ = 2.76 TeV. The p/$\pi$ ratio is presented using two $\pt$ binning schemes: the ratio with its original measured bins is shown along with a recalculated version that uses the same bins as the $\Phi$ meson $\pt$ distribution for $0.5< \pt < 5$ GeV/$c$. In order to show the similarity of the shapes of the two ratios for $\pt < 3$ GeV/$c$, the $\Phi/\pi$ ratio has been scaled so that the $\Phi$ and proton integrated yields are identical. In both panels, the statistical uncertainties are shown as bars and the total systematic uncertainties (including $\pt$-uncorrelated and $\pt$-correlated components) are shown as boxes.