Centrality dependence of charged-hadron pseudorapidity distributions in PbPb collisions at energies available at the CERN Large Hadron Collider in the relativistic diffusion model

Abstract

The centrality dependence of charged-hadron production in relativistic heavy-ion collisions at CERN Large Hadron Collider (LHC) energies is investigated in a nonequilibrium-statistical relativistic diffusion model (RDM) with three sources. Theoretical pseudorapidity distributions are compared with preliminary PbPb ALICE data at LHC energy of $\sqrt{{s}_{NN}}$ $=$ 2.76 TeV for seven centralities, and a previous RDM prediction for this energy is confronted with the data. Refined predictions for 5.52 TeV PbPb based on RDM parameter extrapolations are presented.