Annihilation of nonrelativistic protons
Dal'karov O. D. , Tyapaev R. T., Shapiro I. S.
The cross sections for annihilation ρρ(σα), pp elastic scattering (ae), and pp—*nn charge exchange (ac) are calculated with realistic one-boson-exchange potentials. The level spectrum of quasinuclear baryonium is also calculated. It is the strong nuclear attraction between the nucleon TV and the antinucleon N which gives rise to both the large observed annihilation cross section and the rich spectrum of comparatively narrow quasinuclear states (their widths range from a few MeV to several tens of MeV).