Radiative decays of φ - meson about nature of light scalar resonances
نویسنده
چکیده
We show on gauge invariance grounds that the fine threshold phenomenon is discovered in the radiative decays φ → γa 0 → γπ 0 η and φ → γf 0 → γπ 0 π 0. This enables to conclude that production of the lightest scalar mesons a 0 (980) and f 0 (980) in these decays is caused by the four-quark transitions, resulting in strong restrictions on the large N C expansions of the decay amplitudes. The analysis shows that these constraints give new evidences in favor of the four-quark nature of a 0 (980) and f 0 (980) mesons.
منابع مشابه
Radiative decays of φ-meson and nature of light scalar resonances
Based on gauge invariance, we show that the new threshold phenomenon is discovered in the φ radiative decays φ → γa0 → γπη and φ → γf0 → γππ. This enables to conclude that production of the lightest scalar mesons a0(980) and f0(980) in these decays is caused by the four-quark transitions, resulting in strong restrictions on the large NC expansions of the decay amplitudes. The analysis shows tha...
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