The radiative decay ϕ → γππ in a coupled-channel model and the structure of f0(980)

AbstractA coupled-channel model is used to study the nature of the scalar mesons produced in the decay ϕ → γππ. The K $$\bar K$$ molecular picture of f0(980) is found to be in a good agreement with the recent experimental data from SND and CMD-2. The structure of the light scalar mesons is elucidated by investigating the S-matrix poles and the q $$\bar q$$ spectral density.