Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-04-21
Nuovo Cim. A112 (1999) 225-232
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX text, 8 pages
Scientific paper
10.1007/BF03035844
We calculate the mass spectra of the pseudoscalar and scalar meson nonets in the Nambu--Jona-Lasinio model with the 't Hooft interaction. We obtain satisfactory result for the pseudoscalar mesons. For the scalar mesons, the 't Hooft interaction somewhat increases the values of the masses. However, it is not sufficient to explain the whole scalar mass spectrum. The situation could be improved for the $\sigma$ and $f_0$ mesons through mixing with the glueball state. For the description of the masses of $a_0$ and $\kstar$ mesons, it is necessary to involve the other models. The strong decay widths of the scalar mesons are described.
Nagy Máté
Volkov Mikhail K.
Yudichev V. L.
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