Ω and φ in Au plus Au collisions at √SNN=200 and 11.5 GeV from a multiphase transport model

被引：12
作者：
Ye, Y. J. [1 ,2 ]
Chen, J. H. [1 ]
Ma, Y. G. [1 ,3 ]
Zhang, S. [1 ]
Zhong, C. [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] ShanghaiTech Univ, Shanghai 200031, Peoples R China
来源：
CHINESE PHYSICS C | 2017年 / 41卷 / 08期
基金：
中国国家自然科学基金;
关键词：
multi-strangeness particles; AMPT; RHIC; ELLIPTIC FLOW; ENERGY-DEPENDENCE; GLUON PLASMA; CASCADE;
D O I：
10.1088/1674-1137/41/8/084101
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Within the framework of a multiphase transport model, we study the production and properties of Omega and phi in Au + Au collisions with a new set of parameters for root(NN)-N-S = 200 GeV and with the original set of parameters for root(NN)-N-S = 11.5 GeV. The AMPT model with string melting provides a reasonable description at root(NN)-N-S = 200 GeV, while the default AMPT model describes the data well at root(NN)-N-S = 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 root(NN)-N-S = 11.5 GeV. The comparison of N (Omega(+)Omega(-))/[2N(phi)] 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.
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