Charged particle (pseudo-)rapidity distributions in proton+anti-proton/proton+proton and Pb+Pb/Au+Au collisions from SPS to LHC energies from UrQMD

TL;DR

This paper uses the UrQMD model to analyze charged particle pseudorapidity distributions in various high-energy collisions, showing good agreement with experimental data from SPS to LHC energies.

Contribution

It provides a comprehensive simulation study of charged particle distributions across a wide energy range using UrQMD, extending previous analyses to LHC energies.

Findings

UrQMD accurately reproduces pseudorapidity distributions up to Tevatron energies.

Charged particle multiplicities increase with collision energy.

The model's predictions align well with experimental data.

Abstract

We present results for final state charged particle (pseudo-)rapidity distributions in $\rm{p}$ + $\bar{\rm{p}}$ / $\rm{p}$ + $\rm{p}$ and Pb+Pb/Au+Au at ultra high energies (17.3 GeV $\leq$ $\sqrt{s_{\rm{NN}}}$ $\leq$ 14 TeV) from the Ultra-relativistic Quantum Molecular Dynamics (UrQMD-v2.3) model. In addition, excitation functions of produced charged particle multiplicities ($N_{\rm{ch}}$) and pseudorapidity spectra are investigated up to LHC energies. Good agreement is observed between UrQMD and measured pseudorapidity distributions of charged particles up to the highest Tevatron and Sp$\bar{\rm{p}}$S energies.