Eur. Phys. J. A (2015) 51: 18
https://doi.org/10.1140/epja/i2015-15018-y

Regular Article - Theoretical Physics

Analysis of pPb collisions at LHC energies in the relativistic diffusion model

Institut für Theoretische Physik der Universität Heidelberg, Philosophenweg 16, D-69120, Heidelberg, Germany

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Received: 23 December 2014
Revised: 23 January 2015
Accepted: 3 February 2015
Published online: 13 February 2015

Abstract

Particle production sources in pPb collisions at LHC energies are investigated in pseudorapidity space as functions of centrality. The nonequilibrium-statistical relativistic diffusion model (RDM) with three sources is applied to the analysis of preliminary charged-hadron distributions measured by the ATLAS and ALICE Collaborations in pPb collisions at 5.02TeV. The size of the midrapidity source relative to the fragmentation sources in pPb collisions is considered as a function of centrality, and incident energy. At LHC energies particle production from the mid-rapidity gluon-gluon source is larger than that from the fragmentation sources at all centralities. Conclusions regarding the statistical equilibration process are drawn.