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Nucleon form factors at threshold.
- Source :
-
EPJ Web of Conferences . 10/18/2019, Vol. 218, p1-6. 6p. - Publication Year :
- 2019
-
Abstract
- The pp¯invariant mass spectra in the processes e+e−→ pp¯, e+e−→ nn¯, J/ψ → pp¯ω, J/ψ → pp¯ρ, and J/ψ → pp¯γ close to the pp¯is discussed. The optical potentials for NN¯pair in the superposition of S and D waves (due to tensor forces) at spin unity of the pair, as well as for NN¯pair in the S wave at spin zero of the pair, are proposed. The parameters of the potentials are obtained by fitting the cross sections of NN¯scattering together with the pp¯invariant mass spectra in e+e−→ pp¯annihilation and 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 cross section of e+e−→ 6π and the η'π+ π− invariant mass spectrum in the decay J/ψ → γη'π+π− in the energy region near the NN¯threshold. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21016275
- Volume :
- 218
- Database :
- Academic Search Index
- Journal :
- EPJ Web of Conferences
- Publication Type :
- Conference
- Accession number :
- 139291896
- Full Text :
- https://doi.org/10.1051/epjconf/201921804003