# Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2018 Impact factor 0.961

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (4): 54

• NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH •

### Ω and φ production in Au+Au collisions at =11.5 and 7.7 GeV in a dynamical quark coalescence model

Xiao-Hai Jin 1,2 • Jin-Hui Chen 1 • Yu-Gang Ma 1,3 • Song Zhang 1 • Chun-Jian Zhang 1,2 • Chen Zhong 1

1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
3 ShanghaiTech University, Shanghai 200031, China
• Contact: Jin-Hui Chen E-mail:chenjinhui@sinap.ac.cn
• Supported by:

This work was supported in part by the Major State Basic Research Development Program in China (Nos. 2014CB845400 and 2015CB856904), and the National Natural Science Foundation of China (Nos. 11775288, 11421505, and 11520101004).

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Xiao-Hai Jin, Jin-Hui Chen, Yu-Gang Ma, Song Zhang, Chun-Jian Zhang, Chen Zhong. Ω and φ production in Au+Au collisions at =11.5 and 7.7 GeV in a dynamical quark coalescence model.Nuclear Science and Techniques, 2018, 29(4): 54

Abstract:

The Ω and φ production in relativistic heavy-ion collisions is studied in a dynamical quark coalescence model using the phase space information of strange quarks from a multiphase transport (AMPT) model. Enhanced local parton density fluctuation is implemented in the AMPT to simulate the QCD phase transition dynamics. By studying the transverse momentum pT spectra and the elliptic flow of the multi-strangeness particles, such as Ω and φ, and the Ω/φ ratio as a function of pT in the AMPT, we find that the new development improves the description of experimental data. The study motivates further experimental investigations of Ω and φ production in phase II of the Beam Energy Scan program at RHIC.