Proton and Lambda-Hyperon Production in Nucleus-Nucleus Collisions

TL;DR

This paper compares experimental data on proton and Lambda-hyperon production in nucleus-nucleus collisions with Quark-Gluon String Model predictions, including various effects, achieving 20-30% agreement, and extends predictions to LHC energies.

Contribution

It introduces detailed modeling of string junction diffusion, nuclear interactions, and screening effects within the Quark-Gluon String Model for hyperon production.

Findings

20-30% agreement between model and data

Inclusion of string junction and screening effects

Predictions provided for LHC energies

Abstract

The experimental data on net proton and net Lambda-hyperon spectra obtained by the NA35 Collaboration, as well as the inclusive densities of Lambda and bar-Lambda obtained by NA49, NA57, and STAR collaborations, are compared with the predictions of the Quark-Gluon String Model. The contributions of String Junction diffusion, interactions with nuclear clusters, and the inelastic screening corrections are accounted for. The level of numerical agreement of the calculations with the experimental data is of about 20-30%. The predictions for LHC are also presented.