Particle production sources at LHC energies

TL;DR

This paper investigates particle production sources at RHIC and LHC energies using a relativistic diffusion model, analyzing charged-hadron distributions across various collision types and energies to understand the role of gluon-gluon interactions.

Contribution

It applies a nonequilibrium-statistical relativistic diffusion model with three sources to analyze particle production in different collision systems at high energies.

Findings

Midrapidity source size increases with energy.

Gluon-gluon collisions dominate particle production at LHC energies.

The model describes charged-hadron distributions well across systems.

Abstract

Particle production sources at RHIC and LHC energies are investigated in pseudorapidity space. A nonequilibrium-statistical relativistic diffusion model (RDM) with three sources is applied to the analysis of charged-hadron distributions in AuAu collisions at RHIC energies, in PbPb collisions at the current LHC energy of 2.76 TeV, in pPb at 5.02 TeV, and in pp. The size of the midrapidity source relative to the fragmentation sources in heavy-ion collisions is investigated as function of the incident energy. At LHC energies, the midrapidity value is mostly determined by particle production from gluon-gluon collisions.