Combined Description of $\overline{\mathbf{N}}\mathbf{N}$ Scattering and Annihilation With A Hadronic Model

Abstract

A model for the nucleon-antinucleon interaction is presented which is based on meson-baryon dynamics. The elastic part is the $G$-parity transform of the Bonn $NN$ potential. Annihilation into two mesons is described in terms of microscopic baryon-exchange processes including all possible combinations of $\pi ,\eta ,\rho ,\omega ,a_0,f_0,a_1,f_1,a_2,f_2,K,K^{\ast }$. The remaining annihilation part is taken into account by a phenomenological energy- and state independent optical potential of Gaussian form. The model enables a simultaneous description of nucleon-antinucleon scattering and annihilation phenomena with fair quality.

Comments: revised version, REVTEX, 9 pages, 10 figures available from this URL ftp://ikp113.ikp.kfa-juelich.de/pub/kph140/nucl-th.9411014.uu