PACIAE 2.0: An updated parton and hadron cascade model (program) for the relativistic nuclear collisions

TL;DR

PACIAE 2.0 is an updated computational model for simulating relativistic nuclear collisions, improving upon previous versions by incorporating newer physics and software frameworks, and validated against experimental data.

Contribution

This paper introduces PACIAE 2.0, a revised parton and hadron cascade model based on PYTHIA 6.4, with enhanced physics stages and program structure for better simulation accuracy.

Findings

Model aligns well with experimental data

Effective simulation of parton and hadron stages

Improved physics implementation

Abstract

We have updated the parton and hadron cascade model PACIAE for the relativistic nuclear collisions, from based on JETSET 6.4 and PYTHIA 5.7 to based on PYTHIA 6.4, and renamed as PACIAE 2.0. The main physics concerning the stages of the parton initiation, parton rescattering, hadronization, and hadron rescattering were discussed. The structures of the programs were briefly explained. In addition, some calculated examples were compared with the experimental data. It turns out that this model (program) works well.