QCD phase diagram in chiral imbalance with self-consistent mean field approximation

被引：21

作者：

Yang, Li-Kang ^{[1
]}

Luo, Xiaofeng ^{[2
,3
]}

Zong, Hong-Shi ^{[1
,4
,5
]}

机构：

[1] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

[2] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Hubei, Peoples R China

[3] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China

[4] Nanjing Proton Source Res & Design Ctr, Nanjing 210093, Jiangsu, Peoples R China

[5] Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW D | 2019年 / 100卷 / 09期

基金：

中国国家自然科学基金;

关键词：

PARITY VIOLATION; QUANTUM; COLLISIONS; MODEL;

D O I：

10.1103/PhysRevD.100.094012

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We employ a new self-consistent mean field approximation of the Nambu-Jona-Lasinio (NJL) model, which introduces a free parameter a (a reflects the weight of different interaction channels), to study the effects of the chiral chemical potential mu(5) on QCD phase structure, especially the location of the QCD critical endpoint (CEP). We find that, at a high temperature, the critical temperature of QCD phase transition smoothly increases with mu(5) at the beginning, and then decreases rapidly. At low temperature and high baryon density region, the increase of the chiral chemical potential will reduce the critical chemical potential of phase transition. The temperature of the CEP shows a nonmonotonic dependence on the chiral chemical potential with a long plateau around the maximum. At mu(5) = 0, we found that the CEP will disappear when the a value is larger than 0.71 and will reappear when the mu(5) increases. This study is important for exploring the QCD phase structure and the location of CEP in chiral imbalanced systems.

引用

页数：7

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