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

Abstract

The two-photon decay widths of scalar mesons σ(600), f_0(980) and a_0(980) as well a_0 -> ρ(ω)γand f_0 -> ρ(ω)γare 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 -> ρ(ω)γand f_0 -> ρ(ω)γwidths are given.

9 pages, 2 figures, 1 table

References in corpus (5)

• High statistics study of f_0(980) resonance in gamma gamma --> pi^+ pi^- production
• Two-photon decays of hadronic molecules
• Amplitude Analysis of High Statistics Results on $\gamma \gamma \to {\pi }^{+}{\pi }^{-}$ and the Two Photon Width of Isoscalar States
• Strong and radiative decays of the scalars f0(980) and a0(980) in a hadronic molecule approach
• rho(omega)-> pi^0 pi^0 gamma, rho(omega) -> eta pi^0 gamma decays in the local quark Nambu--Jona-Lasinio model

Cited by in corpus (4)

• Decay of light scalar mesons into vector-photon and into pseudoscalar mesons
• Radiative decays of radially excited mesons ${{\pi }^0}^{\prime }$, ${{\rho }^0}^{\prime }$, ${\omega }^{\prime }$ in NJL model
• Two photon decay and photoproduction of radial excitation of pion ${\pi }_0^{\prime }$
• Hadronic structure from two photon collisions