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arXiv · 0904.2484

Radiative decays of scalar mesons \sigma(600), f_0(980) and a_0(980) in the local Nambu-Jona-Lasinio model

M. K. Volkov·E. A. Kuraev·Yu. M. Bystritskiy
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Abstract

The two-photon decay widths of scalar mesons \sigma(600), f_0(980) and a_0(980) as well a_0 -> \rho(\omega)\gamma and f_0 -> \rho(\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/Nc -approximation where Nc is the number of colors) are taken into account. These contributions, as we show, are the values of the same order of magnitude. For the f_0 decay the K-loop contribution turns out to play the dominant role. The results for two-gamma decays are in satisfactory agreement with modern experimental data. The predictions for a_0 -> \rho(\omega)\gamma and f_0 -> \rho(\omega)\gamma widths are given.

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M. K. Volkov, E. A. Kuraev, Yu. M. Bystritskiy. 2009-04-16. Radiative decays of scalar mesons \sigma(600), f_0(980) and a_0(980) in the local Nambu-Jona-Lasinio model. https://doi.org/10.2478/s11534-009-0131-8

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