The Wigner solution of quark gap equation and chiral phase transition of QCD at finite temperature and nonzero chemical potential

被引：37

作者：

Cui, Zhu-fang ^{[1
,2
,3
]}

Shi, Chao ^{[2
,3
]}

Xia, Yong-hui ^{[2
,3
]}

Jiang, Yu ^{[4
,5
]}

Zong, Hong-shi ^{[2
,3
,4
]}

机构：

[1] Nanjing Univ, Key Lab Modern Acoust, MOE, Inst Acoust, Nanjing 210093, Jiangsu, Peoples R China

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

[3] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China

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

[5] Zhejiang Normal Univ, Ctr Stat & Theoret Condensed Matter Phys, Jinhua City 321004, Zhejiang, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL C | 2013年 / 73卷 / 10期

基金：

中国国家自然科学基金;

关键词：

DYSON-SCHWINGER EQUATIONS; VECTOR INTERACTION; MODEL; CONDENSATE; CONTINUUM; DENSITY;

D O I：

10.1140/epjc/s10052-013-2612-6

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

By employing some modification to the normal NJL model, we discuss the Wigner solution of quark gap equation at finite temperature and chemical potential when the current quark mass m is nonzero. The discovery of the coexistence of the Nambu solution and the Wigner solution at finite temperature and chemical potential beyond the chiral limit is of great importance in the study of the chiral phase transition of QCD. Using the pressure difference between Nambu phase and Wigner phase (or in other words, the bag constant) as an order parameter for chiral phase transition, we draw a possible phase diagram based on our calculations.

引用

页码：1 / 8

页数：8

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