Thermodynamic properties at the kinetic freeze-out in the Au + Au and Cu + Cu collisions at the RHIC using the Tsallis distribution  

作　　者：Wei-Hao Wu Jun-Qi Tao Hua Zheng Wen-Chao Zhang Xing-Quan Liu Li-Lin Zhu Aldo Bonasera 

机构地区：[1]School of Physics and Information Technology,Shaanxi Normal University,Xi’an 710119,China [2]Key Laboratory of Quark and Lepton Physics(MOE)and Institute of Particle Physics,Central China Normal University,Wuhan 430079,China [3]Institute of Nuclear Science and Technology,Sichuan University,Chengdu 610064,China [4]Department of Physics,Sichuan University,Chengdu 610064,China [5]Cyclotron Institute,Texas A&M University,College Station,TX 77843,USA [6]Laboratori Nazionali del Sud,INFN,95123 Catania,Italy

出　　处：《Nuclear Science and Techniques》2023年第10期73-82,共10页核技术（英文）

基　　金：supported in part by the National Natural Science Foundation of China (Nos. 11905120 and 11947416);the Natural Science Foundation of the Sichuan Province (No. 2023NSFSC1322);the United States Department of Energy (#DE-FG02-93ER40773);the NNSA (No. DENA0003841 (CENTAUR))。

摘　　要：The thermodynamic properties of charged particles,such as the energy density,pressure,entropy density,particle density,and squared speed of sound at the kinetic freeze-out in the Au+Au collisions from the relativistic heavy ion collider (RHIC)beam energy scan program √S_(NN) and in the Cu+Cu collisions at √S_(NN),200 GeV are studied using the thermodynamically consistent Tsallis distribution.The energy density,pressure,and particle density decrease monotonically with the collision energy for the same collision centrality;These properties also decrease monotonically from the central to peripheral collisions at the same collision energy.While the scaled energy densityε∕T^(4) and scaled entropy density s∕T^(3) demonstrate the opposite trend with the collision energy for the same collision centrality.There is a correlation betweenε∕T^(4) and s∕T^(3) at the same centrality.In addition,the squared speed of sound was calculated to determine that all the collision energies share nearly the same value at different collision centralities.

关 键 词：Heavy-ion collision Tsallis distribution Kinetic freeze-out Energy density Entropy density Particle density Squared speed of sound Pressure 

分 类 号：O571.6[理学—粒子物理与原子核物理]