Chinese Physics C > 2017, Vol. 41 > Issue(8): 084101 DOI: 10.1088/1674-1137/41/8/084101

Ω andφin Au+Au collisions at sqrt(S_NN)=200 and 11.5 GeV from a multiphase transport model

1.
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
4.
ShanghaiTech. University, Shanghai 200031, China

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Abstract：
Within the framework of a multiphase transport model, we study the production and properties of Ω and φin Au + Au collisions with a new set of parameters for √ ^sNN=200 GeV and with the original set of parameters for √ ^sNN=11.5 GeV. The AMPT model with string melting provides a reasonable description at √ ^sNN=200 GeV, while the default AMPT model describes the data well at √ ^sNN=11.5 GeV. This indicates that the system created at top RHIC energy is dominated by partonic interactions, while hadronic interactions become important at lower beam energy, such as √ ^sNN=11.5 GeV. The comparison of N(Ω ⁺+Ω ^-)/[2 N( φ)] ratio between data and calculations further supports the argument. Our calculations can generally describe the data of nuclear modification factor as well as elliptic flow.
- multi-strangeness particles,
- AMPT,
- RHIC

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Y. J. Ye, J. H. Chen, Y. G. Ma, S. Zhang and C. Zhong. Ω and φin Au+Au collisions at sqrt( S _NN)=200 and 11.5 GeV from a multiphase transport model[J]. Chinese Physics C, 2017, 41(8): 084101. doi: 10.1088/1674-1137/41/8/084101

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Received: 2017-02-03

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Supported by National Natural Science Foundation of China (11421505,11520101004,11220101005,11275250,11322547),Major State Basic Research Development Program in China (2014CB845400,2015CB856904) and Key Research Program of Frontier Sciences of CAS (QYZDJSSW-SLH002)

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沈阳化工大学材料科学与工程学院沈阳 110142

Ω andφin Au+Au collisions at sqrt(S_NN)=200 and 11.5 GeV from a multiphase transport model

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