On Productions of Net-baryons in Central Au-Au Collisions at RHIC Energies

TL;DR

This paper analyzes net-baryon production in central Au-Au collisions at RHIC energies using a multisource thermal model with Tsallis statistics to understand particle distributions and underlying mechanisms.

Contribution

It introduces a comprehensive framework combining Tsallis statistics and a multisource thermal model to analyze net-baryon production and distributions at RHIC energies.

Findings

Effective temperature and entropy index extracted from pT distributions.

Rapidity shift and contribution ratios derived from model parameters.

3D scatter plots reveal different characteristics for various particles.

Abstract

The transverse momentum and rapidity distributions of net-baryons (baryons minus anti-baryons) produced in central gold-gold (Au-Au) collisions at 62.4 and 200 GeV are analyzed in the framework of a multisource thermal model. Each source in the model is described by the Tsallis statistics to extract the effective temperature and entropy index from the transverse momentum distribution. The two parameters are used as input to describe the rapidity distribution and to extract the rapidity shift and contribution ratio. Then, the four types of parameters are used to structure some scatter plots of the considered particles in some three-dimensional (3D) spaces at the stage of kinetic freeze-out, which are expected to show different characteristics for different particles and processes. The related methodology can be used in the analyzes of particle production and event holography, which are useful for us to better understand the interacting mechanisms.