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Nambu--Jona-Lasinio (NJL) model with Kobayashi-Maskawa-'t Hooft (KMT) term isone of low energy effective theory of QCD which includes the $U_A(1)$ anomaly.We investigate nonet meson properties in this model with three flavors ofquarks. We employ two type of regularizations the dimensional and sharp cutoffones. The model parameters are fixed phenomenologically for eachregularization. Evaluating the kaon decay constant, the $\eta$ meson mass andthe topological susceptibility, we show the regularization dependence of theresults and discuss the applicability of the NJL model.

Nonet meson properties in Nambu--Jona-Lasinio model with dimensional versus cutoff regularization