Interaction of real and virtual NN- pairs in J/ψ decays

The differential decay rates of the processes J/ψ→pp- π⁰, J/ψ→pp- η, J/ψ→pp- ω, J/ψ→pp- ρ, and J/ψ→pp- γ close to the pp- threshold are calculated with the help of the NN- optical potential. We use the potential which has been suggested to fit the cross sections of NN- scattering together with all other NN- experimental data available. The pp- nvariant mass spectra of J/ψ decays are in agreement with the available experimental data. The anisotropy of the angular distributions of the decays J/ψ→pp- π⁰(η), which appears due to the tensor forces in the NN- interaction, is predicted close to the pp- threshold. This anisotropy is large enough to be investigated experimentally. Such measurements would allow one to check the accuracy of the model of NN- interaction, is predicted close to the pp- threshold. This anisotropy is large enough to be investigated experimentally. Such measurements would allow one to check the accuracy of the model of NN- interaction. Using our potential and the Green's function approach we also describe the peak in the η^′ π⁺ π^- invariant mass spectrum in the decay J/ψ → γ η^′ π⁺ π^- in the energy region near the NN- threshold.