Particle productions in $p\bar{p}$ collisions in the PACIAE 4.0 model

TL;DR

This paper uses the PACIAE 4.0 model to analyze particle production in $par{p}$ collisions, showing good agreement with experimental data and exploring the effects of initial state matter-antimatter differences on particle spectra.

Contribution

The study extends the PACIAE 4.0 model to $par{p}$ collisions and systematically compares initial state effects on particle production, demonstrating the model's reliability across different collision types.

Findings

Model accurately reproduces $dN_{ch}/d a$ and $p_T$ spectra.

Initial state matter-antimatter differences affect low-energy nucleon production.

Model is versatile for high-energy collision studies.

Abstract

We investigate the particle production in proton-antiproton ($p\bar{p}$) collisions using the PACIAE 4.0 model. The pseudorapidity density distributions ($dN_{\text{ch}}/d\eta$) and transverse momentum ($p_T$) spectra of charged particles from nonsingle diffractive (NSD) $p\bar{p}$ collisions agree well with the experimental data when using model parameters previously determined from nonsingle diffractive proton-proton ($pp$) collisions. Furthermore, we systematically compare results from both inelastic (INEL) and nonsingle diffractive $p\bar{p}$ and $pp$ collisions at the same energy to study the effect of the initial state (matter vs. antimatter) on the transverse momentum spectra of identified particles. Our results show that the net baryon-number difference in the initial state significantly enhances nucleon production at low collision energies, while its effect becomes negligible for high-multiplicity particles or at high collision energies, as expected. These findings further prove that the PACIAE 4.0 model is a versatile and reliable tool for studying high-energy collision physics.