Loop Calculations and OZI Rule

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.

9 pages, LaTeX, axodraw, 2 PostScript figures, submitted to Nuclear Physics A

References in corpus (3)

• Proton-Antiproton Annihilation and Meson Spectroscopy with the Crystal Barrel
• OZI Rule Violation in p pbar Annihilation into phi pi pi by Two Step Processes
• Measurements of the reaction $\bar{p}p\to \varphi \eta$ of antiproton annihilation at rest at three hydrogen target densities

Cited by in corpus (1)

• $\varphi$ and $\omega$ Meson Production in pp Reactions at $p_{lab}$=3.67 GeV/c