RHIC-BES能区Au+Au碰撞中粒子横动量的研究  

Transverse Momentums of Particles Produced in Au+Au Collisions at RHIC-BES Energies

作　　者：张班 李保春[1] ZHANG Ban;LI Baochun(School of Physics and Electronics Engineering,Shanxi University,Taiyuan 030006,China)

机构地区：[1]山西大学物理电子工程学院,山西太原030006

出　　处：《山西大学学报（自然科学版）》2022年第5期1273-1280,共8页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(12047571,11575103);山西省自然科学基金(201701D121005)。

摘　　要：高能核碰撞中产生的末态粒子蕴含着碰撞过程中的重要信息。粒子的横动量分布是高能碰撞中的重要观测量。文章通过Boltzmann函数方法研究了束流扫描能区的多种粒子的横动量分布。比较分析了横动量分布对中心度的依赖程度以及对系统碰撞能量的依赖程度。研究发现:系统温度随碰撞中心度的升高而升高,且随粒子质量的增大也是升高的。The final-state particles produced in high-energy nuclear collisions contain important information of the collision process.The transverse momentum spectra of the particles are an important observation in the high-energy collisions.Boltzmann function method is used to study the transverse momentum distribution of multiple particles in the beam scanning energy region.The dependences of the transverse momentum distribution on the collision centrality and on the collision energy are compared and analyzed.The results indicated that the temperature increases with the increase of the collision centrality and also increases with the increase of the particle mass.

关 键 词：高能核碰撞 横动量谱 粒子产生机制 

分 类 号：O572.2[理学—粒子物理与原子核物理]