Two-flavor QCD phases and condensates at finite isospin chemical potential

被引：16
|
作者：
Zhang, Zhao [1 ]
Liu, Yu-Xin
机构：
[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
[2] CCAST, World Lab, Beijing 100080, Peoples R China
来源：
PHYSICAL REVIEW C | 2007年 / 75卷 / 03期
关键词：
D O I：
10.1103/PhysRevC.75.035201
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We study the phase structure and condensates of two-flavor QCD at finite isospin chemical potential in the framework of a confining, Dyson-Schwinger equation model. We find that the pion superfluidity phase is favored at high enough isospin chemical potential. A new gauge-invariant mixed quark-gluon condensate induced by isospin chemical potential is proposed based on operator product expansion. We investigate the sign and magnitude of this new condensate and show that it is an important condensate in QCD sum rules at finite isospin density.
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页数：8
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