对称性自发破缺重正化方法

Method of the renormalization to spontaneous symmetry breaking

微扰论是粒子物理学中一种非常有用的方法,但是在计算中它有时会破坏对称性,产生对称性自发破缺。若用抵消项重正化方法,可以通过对标量系统的拉氏量密度进行处理,由量子场论中分离出有意义的物理结果,可以弥补微扰论方法的不足。文章以4阶自相互作用介子场和在标量电动力学中的两个抵消项重正化应用例子进行说明。

The perturbation theory is a very appealing method in particle physics. But some times the perturbation theory will devastate symmetry in computation,and bring about symmetry spontaneity breaking. Whereas, introduction of counterweight term may zero pertubation and the Lagrange density of self- acting term pro-ducting symmetry spotaneity breaking proceed renormalization,and make up for the weakness of the perturbation theory. The article discusses the application of the counterweight term renormalization in the meson field of four - steps self - acting and scalar QED.