自能函数和夸克的动力学质量

原子核物理评论 , 2007, 24(4): 253-257. doi: 10.3969/j.issn.1007-4627.2007.04.001

自能函数和夸克的动力学质量

蒙成举 ^1, , 潘继环 ^2, , 周丽娟 ^3, , 马维兴 ^4,

1.河池学院物理与电子工程系,广西,宜州,546300

2.河池学院物理与电子工程系,广西,宜州,546300

3.广西工学院强子物理与非微扰QCD合作研究组,广西,柳州,545006

4.中国科学院高能物理研究所,北京,100049

基金项目: 广西科技厅科研项目(0481030;0542042;0575020) 国家自然科学基金(10565001;10647002)

关键词：夸克传播子 , 自能函数 , 动力学的夸克质量

Dynamical Masses of Quarks and Self-energy Functions

Keywords： quark propagator , self-energy function , dynamical mass of quark

研究夸克的质量是QCD研究中的一个非常重要问题.因为,夸克质量是标准模型的基本输入参数,准确地确定这些参数无论对于唯象的应用还是对于理论的应用都是极其重要的.基于参数化的完全穿衣服的夸克传播子,研究了自能函数和夸克的动力学质量.理论预言了夸克质量和自能函数,其结果与文献中的经验值相符合,也与Dyson-Schwinger方程解一致.反过来这也说明了参数化的夸克传播子是成功和可靠的.

Study of mass of quark is one of the most important issues in the investigation of QCD.Because masses of quarks are fundamental QCD input parameters of standard Model,and an accurate determination of these parameters is extremely important for both phenomenological and theoretical applications.Based on the parameterized fully dressed quark propagator proposed by US,the theoretical predictions of the masses of quarks are predicted in this short note.The effective quark mass is defined by the scalar self-energy function Bf(p2) and vector self-energy function Af(p2).The results of our calculations are in agreement with the empirical values used widely in literature and also show that the parametefized form of quark propagator is an applicable and reliable approximation.

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