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

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2017,（8）
• 页码范围: 71-77
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1137/41/8/084101

摘要

Within the framework of a multiphase transport model,we study the production and properties of Ω and φ in 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-)/[2N(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.