We calculate the nuclear modification factor of neutral pions and the photon yield at high pT in central Au-Au collisions at the Relativistic Heavy-Ion Collider (RHIC) (√s=2000.3em0exGeV) and Pb-Pb collisions at the Large Hadron Collider (LHC) (√s=55000.3em0exGeV). A leading-order accurate treatment of jet energy loss in the medium has been convolved with a physical description of the initial spatial distribution of jets and a one dimensional hydrodynamic expansion. We reproduce the nuclear modification factor for pions RAA at RHIC, assuming an initial temperature Tᵢ=3700.3em0exMeV and a formation time τᵢ=0.26 fm/c, corresponding to dN/dy=1260. The resulting suppression depends on the particle rapidity density dN/dy but weakly on the initial temperature. The jet energy loss treatment is also included in the calculation of high pT photons. Photons coming from primordial hard N-N scattering are the dominant contribution at RHIC for pT>50.3em0exGeV, whereas at the LHC, the range 8<pT<140.3em0exGeV is dominated by jet-photon conversion in the plasma.
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Turbide et al. (2005) studied this question.
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