Chiral phase transition in an extended NJL model with higher-order multi-quark interactions

被引：59
|
作者：
Kashiwa, Kouji
Kouno, Hiroaki [1 ]
Sakaguchi, Tomohiko
Matsuzaki, Masayuki
Yahiro, Masanobu
机构：
[1] Saga Univ, Dept Phys, Saga 8408502, Japan
[2] Kyushu Univ, Grad Sch Sci, Dept Phys, Fukuoka 8128581, Japan
[3] Fukuoka Univ Educ, Dept Phys, Fukuoka 8114192, Japan
来源：
PHYSICS LETTERS B | 2007年 / 647卷 / 5-6期
关键词：
D O I：
10.1016/j.physletb.2007.01.061
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The chiral phase transition is studied in an extended Nambu-Jona-Lasinio model with eight-quark interactions. Equations for scalar and vector quark densities, derived in the mean field approximation, are nonlinear and mutually coupled. The scalar type nonlinear term hastens the restoration of chiral symmetry, while the scalar-vector mixing term makes the transition sharper. The scalar type nonlinear term shifts the critical endpoint toward the values predicted by lattice QCD simulations and the QCD-like theory. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：446 / 451
页数：6
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