2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/178825A coupled channel model is used to study the nature of the scalar mesons produced in the decay phi - gamma pi pi. The KKbar 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 qqbar spectral density.20 pages, 18 PostScript figuresHigh Energy Physics - Phenomenologytext