f0(980)-meson as a $$ \bar K $$ molecule in a phenomenological Lagrangian approach

We discuss a possible interpretation of the f ₀(980)-meson as a hadronic molecule —a bound state of K and mesons. Using a phenomenological Lagrangian approach we calculate the strong f ₀(980) → ππ and electromagnetic f ₀(980) → γγ decays. The compositeness condition provides a self-consistent method to determine the coupling constant between f ₀ and its constituents, K and . Form factors governing the decays of the f ₀(980) are calculated by evaluating the kaon loop integrals. The predicted f ₀(980) → ππ and f ₀(980) → γγ decay widths are in good agreement with available data and results of other theoretical approaches.