Derivation of a Closed Expression of the B-S Interaction Kernel for Quark-Antiquark Bound States  

作　　者：SU Jun-Chen 

机构地区：[1]Center for Theoretical Physics, Physics College, Jilin University, Changchun 130023, China

出　　处：《Communications in Theoretical Physics》2002年第10期433-446,共14页理论物理通讯（英文版）

基　　金：国家自然科学基金，the Research Fund for the Doctoral Program of Higher Education of China

摘　　要：The interaction kernel in the Bethe-Salpeter (B-S) equation for quark-antiquark bound states is derivedfrom B-S equations satisfied by the quark-antiquark four-point Green's function. The latter equations are establishedbased on the equations of motion obeyed by the quark and antiquark propagators, the four-point Green's function andsome other kinds of Green's functions, which follow directly from the QCD generating functional. The derived B-Skernel is given by a closed and explicit expression which contains only a few types of Green's functions. This expressionis not only convenient for perturbative calculations, but also applicable for nonperturbative investigations. Since thekernel contains all the interactions taking place in the quark-antiquark bound states, it actually appears to be the mostsuitable starting point of studying the QCD nonperturbative effect and quark confinement.

关 键 词：B-S equation  INTERACTION kernel  qq BOUND state 

分 类 号：O4[理学—物理]