# Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (11): 164

• NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH •

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

Hai-Ling Lao 1 • Fu-Hu Liu 1 • Bao-Chun Li 1 • Mai-Ying Duan 1 • Roy A. Lacey 2

1. 1 Institute of Theoretical Physics & State Key Laboratory of
Quantum Optics and Quantum Optics Devices, Shanxi
University, Taiyuan 030006, China
2 Departments of Chemistry & Physics, Stony Brook
University, Stony Brook, NY 11794, USA
• Contact: Fu-Hu Liu E-mail:fuhuliu@163.com; fuhuliu@sxu.edu.cn
• Supported by:
This work was 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, and the US DOE (DE-FG02-87ER40331.A008).
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Hai-Ling Lao, Fu-Hu Liu, Bao-Chun Li, Mai-Ying Duan, Roy A. Lacey. Examining the model dependence of the determination of kinetic freeze-out temperature and transverse flow velocity in small collision system.Nuclear Science and Techniques, 2018, 29(11): 164
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Abstract:

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.