Calculation of Some Properties of Vacuum and π，σ Mesons in the Global Color Symmetry Model

作     者：ZONGHong－Shi LIUYu－Xin 等 

作者机构：DepartmentofPhysicsNanjingUniversityNanjing210093China InstituteofTheoreticalPhysicsAcademiaSinic 

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

年 卷 期：2001年第36卷第2期

页      面：187-194页

核心收录：

学科分类：07[理学] 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 南京大学校科研和教改项目 

主　　题：高能物理 真空性质 πσ介子 整体色对称模型 

摘      要：Based on the quark propagator derived in the instanton dilute liquid approximation, the quark condensate susceptibilities have been calculated at the mean-field level in a nonperturbative QCD model. The numerical results are compatible with the values obtained within other nonperturbative approaches. The calculated masses and decay constants of π and σ mesons are close to the experimental values. These results show that the instanton medium might be a good approximation of the QCD vacuum.