山西大学学报（自然科学版）2025，Vol.48Issue(3)：550-557,8.DOI:10.13451/j.sxu.ns.2023147
200 GeV的Au+Au碰撞中粲奇异介子的动力学冻结性质
Kinetic Freeze-out Properties of Charm-strange Mesons in Au+Au Collisions at 200 GeV
摘要
Abstract
The transverse momentum spectra of charm-strange meson DS±by model research in Au+Au collisions at 200 GeV is studied.The non-extensive Tsallis statistic model,Blast-wave model and Tsallis Blast-wave model are applied to analyze the particle distributions in various centrality bins.They are compared with the STAR experiment results.The appropriate range of the trans-verse momentum and the kinetic freeze-out parameters in each model are studied.The non-extensive parameter q and the kinetic freeze-out temperature rise with the centrality percentage.The mean radial flow decreases with the centrality percentage.Fireballs produced in central collisions survive longer and have a longer evolution time than those produced in peripheral collisions.Com-pared with the light hadrons,DS±freeze out earlier and has smaller radial velocity and higher kinetic freeze-out temperature.Particles are created in earlier stage due to the larger mass and carry the information of Quark-Gluon Plasma(QGP).These freeze-out proper-ties can help us to better understand the evolution of the matter in high-energy nucleus collisions.关键词
高能核-核碰撞/Tsallis冲击波模型/DS±粒子谱/动力学冻结Key words
nucleus-nucleus collision at high energies/Tsallis Blast-wave model/DS±spectra/kinetic freeze-out分类
数理科学引用本文复制引用
白慧,李保春..200 GeV的Au+Au碰撞中粲奇异介子的动力学冻结性质[J].山西大学学报（自然科学版）,2025,48(3):550-557,8.基金项目
国家自然科学基金(11575103) （11575103）
山西省自然科学基金(202103021224036) （202103021224036）
