首页|Rapidity density distributions of identified particles and light nuclei in Au+Au collisions at $\sqrt{s_{NN}}$ = 3 GeV using Boltzmann-Gibbs thermodynamics and its implication
Rapidity density distributions of identified particles and light nuclei in Au+Au collisions at $\sqrt{s_{NN}}$ = 3 GeV using Boltzmann-Gibbs thermodynamics and its implication
Guo, Miss Xiyao Xie, Miss Zhen Tao, Mr. Junqi ZHENG, Dr. HUA Zhang, Dr. Wenchao zhu, Dr. Lilin Liu, Dr. Xingquan Tan, Dr. Zhiguang Bai, Prof. Xiaozhi Zhou, Prof. Daimei
Rapidity density distributions of identified particles and light nuclei in Au+Au collisions at $\sqrt{s_{NN}}$ = 3 GeV using Boltzmann-Gibbs thermodynamics and its implication
Rapidity density distributions of identified particles and light nuclei in Au+Au collisions at $\sqrt{s_{NN}}$ = 3 GeV using Boltzmann-Gibbs thermodynamics and its implication
摘要
We investigate the rapidity density distributions of identified particles and light nuclei produced in Au+Au collisions at $\sqrt{s_{NN}}$ = 3 GeV, measured by the STAR experiment at the BNL Relativistic Heavy Ion Collider (RHIC), using a fireball model with Boltzmann-Gibbs thermodynamics. The fireball model provides a satisfactory description of the experimental data for identified mesons and baryons across all centrality classes. This overall consistency demonstrates that the fireball model provides a useful phenomenological framework for describing the measured rapidity distributions. However, the description requires species-dependent values of the effective temperature and fireball-shape parameters. While the model reasonably reproduces the rapidity density distributions of deuterons ($d$) produced in central and semi-central collisions, it fails to reproduce their rapidity density distributions in peripheral collisions, as well as those for heavier light nuclei with $A\ge 3$. These results imply that light nuclei produced in high-energy heavy-ion collisions originate from a different particle production mechanism than the identified hadrons.