https://doi.org/10.1140/epja/i2019-12691-8
Regular Article - Theoretical Physics
Particle decay from statistical thermal model in high-energy nucleus-nucleus collisions
1
School of Physics & Electronic Engineering, Xinyang Normal University, 464000, Xinyang, China
2
Key Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, 430079, Wuhan, China
* e-mail: ning.yuchina@gmail.com
Received:
22
October
2018
Accepted:
8
January
2019
Published online:
22
February
2019
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 
GeV, indicating a limiting temperature in hadronic interactions. The fraction of strong or weak decay for final hadrons shows 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.
© SIF, Springer-Verlag GmbH Germany, part of Springer Nature, 2019
