![](/system/files/figures/alcaliva/2018-Aug-08-RGammaComparison.gif)
Comparison between the direct photon ratio $R_{\gamma^{(*)}}=1+\gamma^{(*)}_{\mathrm{dir}}/\gamma^{(*)}_{\mathrm{decay}}$ measured using virtual photons in the centrality range 0$-$10$\%$ to that obtained using real photons in the centrality range 0$-$20$\%$ and several theoretical model calculations (see text for references). The real photon measurement is taken from \cite{ALICEDirectPhotons}. The statistical and systematic uncertainties of the data are represented by vertical bars and boxes.
Comparison between the direct photon ratio $R_{\gamma^{(*)}}=1+\gamma^{(*)}_{\mathrm{dir}}/\gamma^{(*)}_{\mathrm{decay}}$ measured using virtual photons in the centrality range 0$-$10$\%$ to that obtained using real photons in the centrality range 0$-$20$\%$ and several theoretical model calculations (see text for references). The real photon measurement is taken from \cite{ALICEDirectPhotons}. The statistical and systematic uncertainties of the data are represented by vertical bars and boxes.