Loop calculations and OZI rule Original Research Article

The role of two step mechanisms in the OZI rule violation in View the MathML source annihilation at low energies is reviewed. The full calculation of two-meson doorway mechanisms shows that the off-mass-shell contributions are important. Moreover, for the Φπ0 and Φϱ annihilation channels three-meson doorway contributions are non-negligible and improve agreement with the data. A significant enhancement of Φ production is found in the resonant rescattering mechanisms View the MathML source and View the MathML source.