At the end of 1995, the Frascati ϕ-factory will being delivering of the order of 500 ϕ-mesons/sec. This provides a unique opportunity to study the f0 (975) in ϕ radiative decays, even for branching ratios which in some estimates could be as low as 1x10^-6. This unique, lightest scalar meson state is poorly described by current models, and more information is essential. By Monte Carlo studies we show that the smallest expected branching ratio can easily be measured in the decay f₀->π⁰π⁰. In decays to π^+π^-, there are backgrounds from continuum processes. Interference between one of these processes and the f0 amplitude leads t very interesting and complex patterns. A complete study of the photon spectrum from e^+e^- ->π^+π^-γ at the peak, after suppression of continuum contributions by suitable kinematics and angular cuts, can determine the sign of the πf₀γ coupling even for the smallest branching ratio, thus providing a totally new piece of information for the investigation of the nature of the f0. a similar study of the decay π->η'γ shows that is branching ratio can be measured with very good accuracy, therefore measuring the gluon contents of light pseudoscalar mesons to high accuracy.
Lee et al. (Tue,) studied this question.
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