Paris NN potential constrained by recent antiprotonic-atom data and np total cross sections
Journal Article
·
· Physical Review. C, Nuclear Physics
- Laboratoire de Physique Nucleaire et de Hautes Energies, Groupe Theorie, IN2P3-CNRS, Universites Pierre and Marie Curie et Paris Diderot, 4 Place Jussieu, F-75252 Paris, Cedex (France)
- Soltan Institute for Nuclear Studies, Warsaw (Poland)
We report on an updated Paris NN optical potential. The long- and intermediate-range real parts are obtained by G-parity transformation of the Paris NN potential based on a theoretical dispersion-relation treatment of the correlated and uncorrelated two-pion exchange. The short-range imaginary potential parametrization results from the calculation of the NN annihilation box diagram into two mesons with a nucleon-antinucleon intermediate state in the crossed channel. The parametrized real and imaginary short range parts are determined by fitting not only the existing experimental data included in the 1999 version of the Paris NN potential, but also the recent antiprotonic-hydrogen data and np total cross sections. The description of these new observables is improved. Only this readjusted potential generates an isospin zero {sup 1}S{sub 0}, 52 MeV broad quasibound state at 4.8 MeV below the threshold. Recent BES data on J/{psi} decays could support the existence of such a state.
- OSTI ID:
- 21286923
- Journal Information:
- Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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