用狄拉克δ函数近似值法处理费米子自能紫外积分发散问题  

Treatment of the ultra-violet integral divergence of the self-energy for fermions with the method of approximate values of Dirac δ function

作　　者：王宗祥[1] 

机构地区：[1]大庆石油学院化学化工学院,黑龙江大庆163318

出　　处：《大学物理》2007年第10期5-8,11,共5页College Physics

摘　　要：用狄拉克δ函数近似值法的扩展规则导出了电子自能的正规化公式,其形式与文献中用Pauli-Villars法和空-时维度法所得公式大致相似.同时还推导了重整化自能公式,与文献中的完全相同.最后建立了相对项拉氏密度公式.With the extension rule of the method of approximate values ot Dirac δ functiona set regularization equations for the electron self-energy is developed. The equations are similar to those in reference books such as the Pauli-Villars as well as the dimensional regularization equations. The renormalized self-energy equation for electrons is as well developed which is the same as that in reference books. Finally the counterterm Lagrangian equation is confirmed.

关 键 词：量子场相互作用 费米子自能 紫外发散 狄拉克δ函数 

分 类 号：O412.3[理学—理论物理] O413.3[理学—物理]