Properties of the particle distribution in Pb–Pb collisions at sNN=5.02 TeV and sNN=2.76 TeV

Frontiers in Physics

Physics

Bao-Chun Li¹  Yan-Feng Geng¹ 

[1] College of Physics and Electronics Engineering, Shanxi University, Taiyuan, Shanxi, China;Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, China;

关键词: Tsallis statistics;    multisource production;    transverse momentum spectra;    nuclear modification factor;    high-energy heavy-ion collisions;   

DOI  :  10.3389/fphy.2023.1257937

 received in 2023-07-13, accepted in 2023-08-24,  发布年份 2023

来源: Frontiers

【 摘 要 】

Properties of the particle distribution in high energy heavy-ion collisions are important for understanding the particle production. In Tsallis statistics with a multisource production, we study the transverse momentum spectra of D0, D+, D*+, Ds+, J/ψ in Pb–Pb collisions at sNN = 5.02 TeV and charged particles in Pb–Pb collisions at sNN = 2.76 TeV. A good agreement can be observed between the results obtained in the model and the experimental results of ALICE and CMS collaboration. The nuclear modification factor RAA is reproduced. Properties reflected in the multiparticle system are discussed by the parameters provided in the improved model. It is found that the temperature T and the tft/τ increase with the centrality for the same particle due to the excitation degree of the multiparticle system. The non-equilibrium degree at sNN = 5.02 TeV is larger than that at sNN = 2.76 TeV. It shows that the system at the larger collision energy deviates farther from the equilibrium state.

【 授权许可】

Unknown   
Copyright © 2023 Geng and Li.