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Ω and ϕ production in Au + Au collisions at \(\sqrt{s_{_\mathrm{NN}}} = 11.5\)  and 7.7 GeV in a dynamical quark coalescence model

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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 \(p_{\rm T}\) spectra and the elliptic flow of the multi-strangeness particles, such as Ω and ϕ, and the \(\Omega /\phi \) ratio as a function of \(p_{\rm T}\) 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.

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Acknowledgements

We are grateful to Dr. Zi-Wei Lin for the help to implement the local parton density fluctuation effect in AMPT model.

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Authors and Affiliations

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China

    Xiao-Hai Jin, Jin-Hui Chen, Yu-Gang Ma, Song Zhang, Chun-Jian Zhang & Chen Zhong

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Xiao-Hai Jin & Chun-Jian Zhang

  3. ShanghaiTech University, Shanghai, 200031, China

    Yu-Gang Ma

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  1. Xiao-Hai Jin
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  2. Jin-Hui Chen
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  3. Yu-Gang Ma
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  4. Song Zhang
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Corresponding author

Correspondence to Jin-Hui Chen.

Additional information

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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Jin, XH., Chen, JH., Ma, YG. et al. Ω and ϕ production in Au + Au collisions at \(\sqrt{s_{_\mathrm{NN}}} = 11.5\)  and 7.7 GeV in a dynamical quark coalescence model. NUCL SCI TECH 29, 54 (2018). https://doi.org/10.1007/s41365-018-0393-1

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