Particle decay from statistical thermal model in high energy nucleus-nucleus collision

TL;DR

This paper uses a statistical thermal model to analyze how particle yields and decay contributions vary with energy in high-energy nucleus-nucleus collisions, revealing a saturation point around 10 GeV.

Contribution

It provides a systematic analysis of particle yield ratios and decay contributions across energies, establishing baselines for hadronic observables in such collisions.

Findings

Primary hadron fraction decreases with energy and saturates around 10 GeV.

Decay contributions show different energy dependence than primary hadrons.

Results offer reference points for interpreting experimental data.

Abstract

In high energy nucleus-nucleus collisions, it is difficult to measure the contributions of resonance strong decay and weak decay to the final measured hadrons as well as the corresponding effects on some physical observables. To provide a reference from statistical thermal model, we performed a systematic analysis for the energy dependence of particle yield and yield ratios in Au + Au collisions. We found that the primary fraction of final hadrons decreases with increasing collision energy and somehow saturates around $\sqrt{s_\textrm{NN}}$ = 10 GeV, indicating a limiting temperature in hadronic interactions. The fraction of strong or weak decay for final hadrons show a different energy dependence behavior comparing to the primarily produced hadrons. These energy dependences of various particle yield and yield ratios from strong or weak decay can provide us with baselines for many hadronic observables in high energy nucleus-nucleus collisions.