Interaction of real and virtual pp¯ pairs in J/ψ→pp¯γ(ρ,ω) decays

A. I. Milstein, S. G. Salnikov

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


The pp¯ invariant mass spectra of the processes J/ψ→pp¯ω, J/ψ→pp¯ρ, and J/ψ→pp¯γ close to the pp¯ threshold are calculated by means of the NN¯ optical potential. The potential model for NN¯ interaction in the S01 state is proposed. The parameters of the model are obtained by fitting the cross section of NN¯ scattering together with the pp¯ invariant mass spectra of the J/ψ decays. Good agreement with the available experimental data is achieved. Using our potential and the Green's function approach we also describe the peak in the ηπ+π invariant mass spectrum in the decay J/ψ→γηπ+π in the energy region near the NN¯ threshold.

Original languageEnglish
Pages (from-to)54-63
Number of pages10
JournalNuclear Physics A
Publication statusPublished - 1 Oct 2017


  • Final-state interaction
  • Hadronic form factors
  • Optical potentials
  • ETA
  • J/PSI

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