%0 Journal Article
%T Loop Calculations and OZI Rule
%A V. E. Markushin
%J Physics
%D 1998
%I arXiv
%R 10.1016/S0375-9474(99)00200-6
%X The role of two step mechanisms in the OZI rule violation in NNbar 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 (phi pi0) and (phi rho) annihilation channels three-meson doorway contributions are non-negligible and improve agreement with the data. A significant enhancement of phi production is found in the resonant rescattering mechanisms p pbar -> pi+ pi- K Kbar -> pi+ pi- phi and p pbar -> eta K Kbar -> eta phi.
%U http://arxiv.org/abs/hep-ph/9812294v1