NEARTHRESHOLD PHENOMENA IN LOW ENERGY ANTIPROTON PHYSICS

Abstract

The experimental data on low energy [Formula: see text] elastic scattering and annihilation, and on the [Formula: see text] reaction near threshold are well-described in the framework of a simple unitary coupled channel model. Large P-wave enhancement observed in these experiments is shown to be a result of the existence of the nearthreshold bound and resonant P-states of quasinuclear nature in baryon-antibaryon systems. Other possible manifestations of such [Formula: see text] states in the experiments with low energy antiprotons are considered.