CGC initial conditions at RHIC and LHC

TL;DR

This paper uses Monte Carlo kT-factorization with KLN and BK gluon distributions to analyze particle multiplicities and transverse energy in heavy-ion collisions at RHIC and LHC, comparing predictions to experimental data.

Contribution

It introduces a detailed Monte Carlo approach with specific gluon distributions to improve understanding of initial conditions in heavy-ion collisions at RHIC and LHC.

Findings

Good agreement with experimental multiplicity data

Predicted transverse energy matches ALICE measurements

Provides insights into gluon distributions at high energies

Abstract

Monte-Carlo implementations of kT -factorization formula with both KLN and running-coupling BK unintegrated gluon distributions for nucleus-nucleus collisions are used to analyze recent experimental data on the particle multiplicities from RHIC(Au+Au@200GeV) and LHC(Pb+Pb@2.76TeV). We also compare the predicted transverse energy at midrapidity to new data from ALICE.