Figure 15

Isolated-photon cross section ratio of pp collisions at $\sqrt{s}=7$ TeV from [49] (left) and $\sqrt{s}=13$ TeV from [67] (right) over $\sqrt{s}=5.02$ TeV in data and NLO calculation from JETPHOX for $R=0.4$. Error bars and empty boxes are the data statistical and systematic uncertainties, respectively. Filled boxes represent the theory scale (orange) and PDF (pink) uncertainties.