Description of $$\overline N $$ N scattering and annihilation processes with hadronic models

Abstract

A consistent description of the ¯NN scattering and annihilation with a hadronic model is presented. The elastic ¯NN interaction is obtained from the Bonn NN potential via aG-parity transformation. For the annihilation part, a consistent, partly microscopic description is constructed treating the most important two meson channels explicitly and accounting for the rest by a phenomenological optical potential of Gaussian form. Transitions from the antibaryon-baryon sector to the meson sector are mediated via the exchange of N, Δ, Λ, Σ and Y* baryons. Results are compared with former calculations and the experimental data.