Abstract
We calculate the high energy photon production from the Pb + Pb collisions for different centrality classes at sNN=2.76 TeV Large Hadron Collider (LHC) energy. The jet energy loss in the jet fragmentation, jet-photon conversion and jet bremsstrahlung is considered by using the Wang–Huang–Sarcevic (WHS) and Baier–Dokshitzer–Mueller–Peigne–Schiff (BDMPS) models. We use the (1+1)-dimensional ideal relativistic hydrodynamics to study the collective transverse flow and space–time evolution of the quark gluon plasma (QGP). The numerical results agree well with the ALICE data of the direct photons from the Pb + Pb collisions (sNN=2.76 TeV) for 0–20%, 20–40% and 40–80% centrality classes.
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