On the scalar nonet in the extended Nambu Jona-Lasinio model

Ming-Xian Su, L. Y. Xiao, H. Q. Zheng

We discuss the lightest scalar resonances, $f_0(600)$, $\kappa (800)$, $a_0(980)$ and $f_0(980)$ in the extended Nambu Jona-Lasinio model. We find that the model parameters can be tuned,…