Properties of the light scalar mesons face experimental data
Abstract
The following topics are considered. 1) Confinement, chiral dynamics, and light scalar mesons. 2) Chiral shielding of the σ(600) 3)The φ meson radiative decays about nature of light scalar resonances. 4) The J/ decays about nature of light scalar resonances. 5) The a0(980)γγ and f0(980)γγ decays about nature of light scalar resonances. 6) New round in γγπ+π-, the Belle data. 7) The a0(980)-f0(980) mixing: theory and experiment. Arguments in favor of the four-quark model of the a0(980) and f0(980) mesons are given.
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