Charged-hadron pseudorapidity distributions in PbPb collisions at LHC energies in the RDM

Abstract

The energy and centrality dependence of charged-hadron production in relativistic heavy-ion collisions 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 energies of 2.76 TeV. Predictions for 5.52 TeV are presented. The nearly equilibrated source at midrapidity arising from gluon-gluon collisions becomes the major origin of particle production at LHC energies. The midrapidity dip is determined by the Jacobian, plus the interplay of the three sources.