4.2 Article

Radiative decays of scalar mesons σ(600), f 0(980) and a 0(980) in the local Nambu-Jona-Lasinio model

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CENTRAL EUROPEAN JOURNAL OF PHYSICS
卷 8, 期 4, 页码 580-586

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SCIENDO
DOI: 10.2478/s11534-009-0131-8

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radiative meson decays; local Nambu-Jona-Lasinio model

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  1. INTAS [05-1000008-8528]

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The two-photon decay widths of scalar mesons sigma(600), f (0)(980) and a (0)(980) as well a (0) -> ju(omega)gamma and f (0) -> ju(omega)gamma are calculated in the framework of the local Nambu-Jona-Lasinio model. The contributions of the quark loops (Hartree-Fock approximation) and the meson loops (next 1/N (c) -approximation where N (c) is the number of colors) are taken into account. The values of these contributions, as we show, are of the same order of magnitude. For the f (0) decay the K-loop contribution plays the dominant role. The results for two-gamma decays are in satisfactory agreement with modern experimental data. The predictions for a (0) -> ju(omega)gamma and f (0) -> ju(omega)gamma widths are given.

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