Abstract
The centrality dependence of charged-hadron production in relativistic heavy- ion collisions at 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 √ sNN = 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.
Highlights
First results of charged-hadron production inPbPb collisions at LHC energies of √ sNN =TeV [1, 2] have recently been analyzed in a nonequilibrium-statistical relativistic diffusion model (RDM) [3].So far, the RDM calculations have been compared to central collision data
In the RDM, the underlying three sources for particle production can be traced back to a midrapidity source resulting from gluon-gluon collisions, and two forward-centered sources arising from valence quark-gluon collisions
Within the RDM, we investigate in this work the centrality and energy dependence of the three sources for particle production in collisions of symmetric systems at RHIC and LHC energies in direct comTphaeriseonnerwgyithradnagtea,caonndsipdreorveiddeheareprfeodricthtieonthfroere-cseonutrrcael scomlloisdieolncsoavtemrsaRxiHmIuCmenLeHrgCieesnoefrg√iessN
Summary
TeV [1, 2] have recently been analyzed in a nonequilibrium-statistical relativistic diffusion model (RDM) [3]. An incoherent superposition of the three sources at the interaction time – where the integration of the transport equation stops – yields good agreement with charged-particle pseudorapidity distributions at RHIC energies. It has been shown in [1, 1, 1] within the RDM that at RHIC energies of. The ingredients of the model are briefly reconsidered, the calculations of pseudorapidity distributions of charged hadrons at RHIC and LHC energies are discussed, results and the determination of the RDM parameters depending on energy and centrality are performed in the fourth section.
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