Scalar mesons in the Nambu–Jona-Lasinio model with ’t Hooft interaction
نویسنده
چکیده
We calculate the mass spectrum of the scalar meson nonet in the Nambu–JonaLasinio model (NJL model) with the ’t Hooft interaction. We also include corrections connected with meson loops in our analysis. The masses of the pseudoscalar and scalar meson nonets are in a satisfactory agreement with experimental data except for the mass of the f0(980) scalar meson. In order to describe this mass more correctly, it is necessary to consider the mixing of σ and f0 mesons with the glueball state. The solution of this problem is delayed until our subsequent work.
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