Description |
The recently available experimental data on direct photon productions from Au+Au collisions at √sNN = 200 GeV RHIC and from Pb+Pb collisions at √sNN = 2.76 TeV LHC energies have been analysed. The transverse momentum (pT) distributions have been evaluated with the assumption of an initial quark gluon plasma phase at energy densities εi=41 and 70 GeV/fm3 with initial thermalisation times τi=0.2 and 1.0 fm/c respectively for RHIC and LHC energies. |