Comprehending particle production at RHIC and LHC energies using global measurements

TL;DR

This paper analyzes particle production in heavy ion collisions at RHIC and LHC energies using a two-component Glauber model, showing it effectively describes centrality-dependent multiplicity and energy densities across energies.

Contribution

It demonstrates that the two-component Glauber model accurately describes charged-particle and transverse energy densities over a broad energy range, incorporating soft and hard process contributions.

Findings

Model successfully describes data across energies and centralities.

Comparison of data ratios reveals energy and x-scaling effects.

Framework unifies understanding of particle production at RHIC and LHC.

Abstract

The centrality dependence of the charged-particle multiplicity densities ($dN_{ch}/d\eta$) and transverse energy densities ($dE_{T}/d\eta$) are investigated using the two-component Glauber approach for broad range of energies in heavy ion collisions at RHIC and LHC. A comprehensive study shows that the data is well described within the framework of two component model which includes the contribution of "soft processes" and "hard processes" for different centrality classes and energies. The data at two different energies are compared by means of the ratio of $dN_{ch}/d\eta$ (and $dE_{T}/d\eta$) to see the interplay of energy and $x$-scaling.