Figure 6

Comparison of model calculations from Refs.[59-62] with the direct photon spectra in Pb-Pb collisions at $\snn$=2.76 TeV for the 0-20% (scaled by a factor 100), the 20-40% (scaled by a factor 10) and 40-80% centrality classes. All models include a contribution from pQCD photons. For the 0-20% and 20-40% classes the fit with an exponential function is shown in addition.