Decoupling of non-strange, strange and multi-strange particles from the system in Cu-Cu, Au-Au and Pb-Pb collisions at high energies

被引：9
作者：
Waqas, M. [1 ]
Peng, G. X. [1 ,2 ,3 ]
Ajaz, Muhammad [4 ]
Wazir, Zafar [5 ]
Ismail, Abd Al Karim Haj [6 ,7 ]
机构：
[1] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China
[2] Inst High Energy Phys, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
[3] Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Peoples R China
[4] Abdul Wali Khan Univ Mardan, Dept Phys, Mardan 23200, Pakistan
[5] Ghazi Univ, Dept Phys, Dera Ghazi Khan, Pakistan
[6] Ajman Univ, Dept Math & Sci, POB 346, Ajman, U Arab Emirates
[7] Ajman Univ, Nonlinear Dynam Res Ctr NDRC, POB 346, Ajman, U Arab Emirates
来源：
CHINESE JOURNAL OF PHYSICS | 2022年 / 77卷
基金：
中国国家自然科学基金;
关键词：
Decoupling; Non-strange; Strange; Multi-strange; Kinetic freeze-out temperature; Transverse flow velocity; Transverse momentum spectra; High energy collisions; TRANSVERSE-MOMENTUM SPECTRA; PROTON-PROTON COLLISIONS; INCLUSIVE J/PSI PRODUCTION; QUARK-GLUON PLASMA; FREEZE-OUT; NUCLEUS-NUCLEUS; IDENTIFIED PARTICLES; CHARGED-PARTICLES; MESON PRODUCTION; PP COLLISIONS;
D O I：
10.1016/j.cjph.2022.03.034
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Transverse momentum spectra of the non-strange, strange and multi-strange particles in central and peripheral Copper-Copper, Gold-Gold and Lead-Lead collisions are analyzed by the blast wave model with Boltzmann Gibbs statistics. The model results are approximately in agreement with the experimental data measured by BRAHMS, STAR, SPS, NA 49 and WA 97 Collaborations in special transverse momentum ranges. Bulk properties in terms of kinetic freeze-out temperature, transverse flow velocity and freeze-out volume are extracted from the transverse momentum spectra of the particles. Separate freeze-out temperature is observed for the non-strange, strange and multi-strange particles which may be due to different reaction cross-section of the interacting particles and it reveals the triple kinetic freeze-out scenario in collisions at BRAHMS, STAR, SPS, NA 49 and WA 97 Collaborations. However the transverse flow velocity and kinetic freeze-out volume are mass-dependent, and both of them decrease for the massive particles. Furthermore, the kinetic freeze-out temperature, transverse flow velocity and kinetic freeze-out volume in central nucleus-nucleus collisions are larger than those in peripheral collisions. Besides, the larger kinetic freeze-out temperature and kinetic freeze-out volume are observed in the heaviest nuclei collisions, indicating their dependence on the size of interacting system.
引用
收藏
页码：1713 / 1722
页数：10
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