arXiv:hep-ph/9812294·v1·High Energy Physics — Phenomenology
Loop Calculations and OZI Rule
V.E. Markushin (Paul Scherrer Institute, Switzerland)🇨🇭
Abstract
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.
Comments: 9 pages, LaTeX, axodraw, 2 PostScript figures, submitted to Nuclear Physics A