QCD类规范的南部模型中费米子与动力学产生的介子的密度效应

Density Effects on the Fermion and the Scalar and Pseudoscalar Mesons in the QCD-Like Gauged NJL Model

将两味（Nf=2）情况下的QCD类规范的南部模型应用到核物质中并得到了费米子的能隙方程．与四费米子相互作用部分相比，胶子部分对费米子质量约有1／4的贡献．手征序参量与QCD求和规则所预言的结果符合得很好．基于能隙方程，得到了标量与赝标量介子的一系列动力学性质，理论结果很好地符合了实验．

The QCD-like gauged NJL model with flavors N_f = 2 is developed toderive the gap equation for the fermion in nuclear medium. In the free space, thegluon part in the gauged NJL model may contribute nearly 1 /4 to the fermion mass.The chiral order parameter is consistent closely with the prediction of the QCD sumrules. Based on the gap equation, the fermion mass in nuclear medium is obtainedand the dynamical properties of the scalar and pseudoscalar mesons are stUdied. Thenumerical resultS in the free space are in fair agreement with the experimental data.