Nuclear modification factor of average D mesons in an anisotropic quark–gluon plasma at the LHC energies

We evaluate the nuclear modification factor ( R_AA ) of average D mesons at center of mass energies √(s_NN) = 2.76 TeV and 5.02 TeV in two centrality classes incorporating radiative energy loss in an anisotropic quark–gluon plasma (aQGP). A simple (1+1) d hydrodynamic model is used to describe the space-time evolution of the aQGP. We compare our results with the ALICE and CMS measurements and it is found that the data are consistent if the isotropization time, τ _iso , is between 2 and 4 fm/ c . We also plot the ratio of R_AA at √(s_NN) = 5.02 TeV to 2.76 TeV and find it to be consistent with the model prediction existing in the literature.