A Modified Approach for Calculating Dressed Quark Propagator at Finite Chemical Potential

作     者：ZONG Hong-Shi CHANG Lei HOU Feng-Yao SUN Wei-Min LIU Yu-Xin 

作者机构：Department of Physics Nanjing University Nanjing 210093 China Center for Particle Nuclear Astrophysics Nanjing University Nanjing 210093 China CCAST (World Laboratory) P.O. Box 8730 Beijing 100080 China Department of Physics Peking University Beijing 100871 China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2005年第44卷第3X期

页      面：519-524页

核心收录：

学科分类：07[理学] 0704[理学-天文学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：国家自然科学基金 高等学校博士学科点专项科研项目 

主　　题：chemical potential dependence Dyson-Schwinger equation approach 

摘      要：Based on the rainbow approximation of Dyson-Schwinger equation and the assumption that the full inverse quark propagator at finite chemical potential is analytic in the neighborhood of μ = 1, it is proved that the dressed quark propagator at finite chemical potential μ can be written as G0^-1 [μ] =iγ·p↑-A（p↑-^2） ＋B（p↑-^2） with p↑-μ= （p↑-p4 ＋iμ）. From the dressed quark propagator at finite chemical potential in Munczek model the bag constant of a baryon and the scalar quark condensate are evaluated. A comparison with previous results is given.