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

作　　者：ZONGHong－Shi LIUYu－Xin 等 

机构地区：[1]DepartmentofPhysics,NanjingUniversity,Nanjing210093,China [2]InstituteofTheoreticalPhysics,AcademiaSinic

出　　处：《Communications in Theoretical Physics》2001年第2期187-194,共8页理论物理通讯（英文版）

基　　金：国家自然科学基金，南京大学校科研和教改项目

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.

关 键 词：高能物理 真空性质 πσ介子 整体色对称模型 

分 类 号：O572.23[理学—粒子物理与原子核物理]