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Figure 4

Direct photon excess ratios for the combined measurements at $\sqrt{s}=2.76$ and 8 TeV including pQCD NLO predictions with CT10~, nCTEQ15~ or CTEQ6.1M~ proton PDF and GRV~ or BFG2~ FF In addition, a JETPHOX calculation~ based on NNPDF2.3QED~ proton PDF and BFG2 FF as well as a POWHEG calculation~ based on the same PDF but with the PYTHIA 8 parton shower algorithm are provided.
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