On the chiral phase transition in the linear sigma model

被引：0
作者：
Tran Huu Phat
Nguyen Tuan Anh
Le Viet Hoa
机构：
[1] Vietnam Atomic Energy Commission,Department of Physics
[2] Institute for Nuclear Science and Technique,undefined
[3] Hanoi University of Education II,undefined
来源：
The European Physical Journal A - Hadrons and Nuclei | 2004年 / 19卷
关键词：
Phase Transition; Effective Action; Sigma Model; Quantum Effect; Finite Temperature;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The Cornwall-Jackiw-Tomboulis (CJT) effective action for composite operators at finite temperature is used to investigate the chiral phase transition within the framework of the linear sigma model as the low-energy effective model of quantum chromodynamics (QCD). A new renormalization prescription for the CJT effective action in the Hartree-Fock (HF) approximation is proposed. A numerical study, which incorporates both thermal and quantum effect, shows that in this approximation the phase transition is of first order. However, taking into account the higher-loop diagrams contribution the order of phase transition is unchanged.
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页码：359 / 365
页数：6
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