Abstract
The energy 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 Au+Au data at RHIC energies of sNN=0.13 and 0.2 TeV, and computed for Pb+Pb central collisions at LHC energies of 2.76 and 5.52 TeV. The central, nearly equilibrated source arising from gluon–gluon collisions becomes the major origin of particle production at LHC energies. The midrapidity dip is determined by the interplay of the three sources.
Highlights
With energies the of√adsvNeNn=t o2f .fi7r6stTreeVsuilnts from heavy-ion collisions at LHC central Pb + Pb collisions [1,2], a new perspective on this area of research opens up
The model relies on three sources for charged-hadron production, with the midrapidity source associated with gluon–gluon collisions, and two forwardcentered fragmentation sources arising essentially from valence quark–gluon interactions
It has been shown in [7,8,9] within the relativistic diffusion model (RDM) that at RHIC energies of 0.13 TeV (0.2 TeV) the midrapidity source generates about 13% (26%) of the produced particles in a 0–6% central Au + Au collision, whereas the bulk of the particles is still produced in the two fragmentation sources
Summary
√adsvNeNn=t o2f .fi7r6stTreeVsuilnts from heavy-ion collisions at LHC central Pb + Pb collisions [1,2], a new perspective on this area of research opens up. The model relies on three sources for charged-hadron production, with the midrapidity source associated with gluon–gluon collisions, and two forwardcentered fragmentation sources arising essentially from valence quark–gluon interactions It has been shown in [7,8,9] within the relativistic diffusion model (RDM) that at RHIC energies of 0.13 TeV (0.2 TeV) the midrapidity source generates about 13% (26%) of the produced particles in a 0–6% central Au + Au collision, whereas the bulk of the particles is still produced in the two fragmentation sources. Within the RDM, I investigate in this Letter the energy dependence of the three sources for particle production in central collisions of symmetric systems, and provide predictions at LHC energies.
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