Abstract :
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.
