On Collective Properties of Dense QCD Matter

Figure 1

Comparison between the PHENIX photon data and the present model for three centrality bins [2]. The best fit corresponds to 𝛿=0.144±0.0045. The parameter 𝜆 controls the 𝑥 dependence of the saturation momentum with the best fit value 𝜆=0.29±0.05. For each of three color bands, the 𝜂 (or 𝛿) varies as 𝜂=6.65∓0.60 (𝛿≃0.144±0.045) at 𝜆=0.29.