Particle Multiplicities in Lead-Lead Collisions at the CERN Large Hadron Collider from Nonlinear Evolution with Running Coupling Corrections

2007/07/31 by Javier L. Albacete · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevlett.99.262301

published as Phys.Rev.Lett.99:262301,2007 · Version accepted for publication by Phys. Rev. Lett. Typos corrected, one figure removed and references updated

arxiv created 2007/10/22 · openalex publication_date 2007/12/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present predictions for the pseudorapidity density of charged particles produced in central Pb-Pb collisions at the LHC. Particle production in such collisions is calculated in the framework of k_t factorization. The nuclear unintegrated gluon distributions at LHC energies are determined from numerical solutions of the Balitsky-Kovchegov equation including recently calculated running coupling corrections. The initial conditions for the evolution are fixed by fitting Relativistic Heavy Ion Collider data at collision energies √s_NN=130 and 200 GeV per nucleon. We obtain dN_ch^Pb\mathrm\text\ensuremath-Pb/d\ensuremathη(√s_NN=5.5 TeV)|_\ensuremathη=0\ensuremath≈1290--1480.

Citations

• Evolution at small x_bj: The Color Glass Condensate
• Triumvirate of running couplings in small-x evolution
• Manifestations of high density QCD in the first RHIC data
• Saturation effects in deep inelastic scattering at lowQ2and its implications on diffraction
• Inclusive gluon production in deep inelastic scattering at high parton density

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