Interaction of real and virtual p p bar pairs in J / ψ → p p bar γ (ρ , ω) decays
Abstract
The p p bar invariant mass spectra of the processes J / ψ → p p bar ω, J / ψ → p p bar ρ, and J / ψ → p p bar γ close to the p p bar threshold are calculated by means of the N N bar optical potential. The potential model for N N bar interaction in the S10 state is proposed. The parameters of the model are obtained by fitting the cross section of N N bar scattering together with the p p bar 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 η‧π+π- invariant mass spectrum in the decay J / ψ → γη‧π+π- in the energy region near the N N bar threshold.
- Publication:
-
Nuclear Physics A
- Pub Date:
- October 2017
- DOI:
- 10.1016/j.nuclphysa.2017.06.002
- arXiv:
- arXiv:1701.05741
- Bibcode:
- 2017NuPhA.966...54M
- Keywords:
-
- Hadronic form factors;
- Final-state interaction;
- Optical potentials;
- High Energy Physics - Phenomenology;
- Nuclear Theory
- E-Print:
- 13 pages, 12 figures