Validity of Parametrized Quark Propagator  

作　　者：ZHUJi-Zhen ZHOULi-Juan MAWei-Xing 

机构地区：[1]DepartmentofInformationandComputingScience,GuangxiUniversityofTechnology,Liuzhou545006,China [2]DepartmentofInformationandComputingScience,GuangxiUniversityofTechnology,Liuzhou545006,China//CollegeofPhysicalScienceandEngineeringTechnology,GuangxiUniversity,Nanning530004,China [3]DepartmentofInformationandComputingScience,GuangxiUniversityofTechnology,Liuzhou545006,China//InstituteofHighEnergyPhysics,theChineseAcademyofSciences,P.O.Box918,Beijing100039,China

出　　处：《Communications in Theoretical Physics》2005年第1X期117-122,共6页理论物理通讯（英文版）

基　　金：国家自然科学基金，Science Foundation of Department of Science and Technology of Guangxi，广西大学校科研和教改项目

摘　　要：Based on an extensively study of the Dyson-Schwinger equations for a fully dressed quark propagator in the "rainbow" approximation, a parametrized fully dressed quark propagator is proposed in this paper. The parametrized propagator describes a confining quark propagator in hadron since it is analytic everywhere in complex p2-plane and has no Lemmann representation. The validity of the new propagator is discussed by comparing its predictions on selfenergy functions Af(p2), Bf(p2) and effective mass Mf(p2) of quark with flavor f to their corresponding theoretical results produced by Dyson-Schwinger equations. Our comparison shows that the parametrized quark propagator is a good approximation to the fully dressed quark propagator given by the solutions of Dyson-Schwinger equations in the rainbow approximation and is convenient to use in any theoretical calculations.

关 键 词：夸克传播 DYSON-SCHWINGER方程 非干涉QCD 参数表示 高能物理 

分 类 号：O572.33[理学—粒子物理与原子核物理]