Meson Production in Antinucleon Annihilation on Nuclei

Abstract

Abstract. Pion production in coherent antiproton annihilation reactions on nuclei is studied in a fully quantum mechanical description. The elementary elastic NN and the NN → nπ annihilation vertices are obtained from a t-matrix accounting for coupled channels effects. The theoretical amplitudes are used to derive a microscopic NA optical model potential and the meson production vertices. Pion nucleus final state interaction are taken into account by adding higher pion-nucleon resonances beyond the ∆-resonance. Nuclear structure aspects are described by HFB-theory. Results for pA, πA and meson production cross sections are presented.