Examining the model dependence of the determination of kinetic freeze-out temperature and transverse flow velocity in small collision system  

作　　者：Hai-Ling Lao Fu-Hu Liu Bao-Chun Li Mai-Ying Duan Roy A.Lacey 

机构地区：[1]Institute of Theoretical Physics & State Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University [2]Departments of Chemistry & Physics,Stony Brook University

出　　处：《Nuclear Science and Techniques》2018年第11期254-270,共17页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.11575103 and 11747319);the Shanxi Provincial Natural Science Foundation(No.201701D121005);the Fund for Shanxi ‘‘1331 Project’’ Key Subjects Construction;the US DOE(DE-FG02-87ER40331.A008)

摘　　要：The transverse momentum distributions of the identified particles produced in small collision systems at the Relativistic Heavy Ion Collider(RHIC) and Large Hadron Collider(LHC) have been analyzed by four models. The first two models utilize the blast-wave model with different statistics. The last two models employ certain linear correspondences based on different distributions.The four models describe the experimental data measured by the Pioneering High Energy Nuclear Interaction eXperiment, Solenoidal Tracker at RHIC, and A Large Ion Collider Experiment collaborations equally well. It is found that both the kinetic freeze-out temperature and transverse flow velocity in the central collisions are comparable with those in the peripheral collisions. With the increase of collision energy from that of the RHIC to that of the LHC,the considered quantities typically do not decrease. Comparing with the central collisions, the proton–proton collisions are closer to the peripheral collisions.The transverse momentum distributions of the identified particles produced in small collision systems at the Relativistic Heavy Ion Collider(RHIC) and Large Hadron Collider(LHC) have been analyzed by four models. The first two models utilize the blast-wave model with different statistics. The last two models employ certain linear correspondences based on different distributions.The four models describe the experimental data measured by the Pioneering High Energy Nuclear Interaction eXperiment, Solenoidal Tracker at RHIC, and A Large Ion Collider Experiment collaborations equally well. It is found that both the kinetic freeze-out temperature and transverse flow velocity in the central collisions are comparable with those in the peripheral collisions. With the increase of collision energy from that of the RHIC to that of the LHC,the considered quantities typically do not decrease. Comparing with the central collisions, the proton–proton collisions are closer to the peripheral collisions.

关 键 词：KINETIC FREEZE-OUT TEMPERATURE Transverse flow velocity SMALL COLLISION system Central COLLISIONS Peripheral COLLISIONS 

分 类 号：TL[核科学技术]