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题名: 2+1 flavors QCD equation of state at zero temperature within Dyson-Schwinger equations
作者: Xu, Shu-Sheng1, 3; Yan, Yan1; Cui, Zhu-Fang1, 3; Zong, Hong-Shi1, 2, 3
刊名: INTERNATIONAL JOURNAL OF MODERN PHYSICS A
出版日期: 2015-12-30
卷号: 30, 期号:36
关键词: Equation of state ; quark number density ; Dyson-Schwinger equations
DOI: 10.1142/S0217751X15502176
文章类型: Article
英文摘要: Within the framework of Dyson-Schwinger equations (DSEs), we discuss the equation of state (EOS) and quark number densities of 2 + 1 flavors, that is to say, u, d, and a quarks. The chemical equilibrium and electric charge neutrality conditions are used to constrain the chemical potential of different quarks. The EOS in the cases of 2 flavors and 2 + 1 flavors are discussed, and the quark number densities, the pressure, and energy density per baryon are also studied. The results show that there is a critical chemical potential for each flavor of quark, at which the quark number density turns to nonzero from 0; and furthermore, the system with 2 + 1 flavors of quarks is more stable than that with 2 flavors in the system. These discussions may provide some useful in to some research fields, such as the studies related to the QCD phase transitions or compact stars.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Nuclear ; Physics, Particles & Fields
研究领域[WOS]: Physics
关键词[WOS]: QUARK MATTER ; SYMMETRY-BREAKING ; PHASE-TRANSITION ; WIGNER SOLUTION ; POLYAKOV-LOOP ; PNJL MODEL ; NJL-MODEL ; DENSITY ; PHYSICS ; STARS
收录类别: SCI
项目资助者: National Natural Science Foutidation of China(11275097 ; Jiangsu Planned Projects for Postdoctoral Research Funds(1402006C) ; China Postdoctoral Science Foundation(2015M581766) ; 11475085 ; 11535005)
语种: 英语
WOS记录号: WOS:000367524800004
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16099
Appears in Collections:南极天文中心_期刊论文

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作者单位: 1.Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
2.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China
3.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
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