The antinucleon-nucleon quasi-bound states: $J/\psi$ and atomic evidence - Université Pierre et Marie Curie Accéder directement au contenu
Communication Dans Un Congrès Année : 2005

The antinucleon-nucleon quasi-bound states: $J/\psi$ and atomic evidence

Résumé

The measurements of J/psi decays into photon, proton and antiproton show a strong enhancement at the proton-antiproton threshold not seen in the decays into neutral pion, proton and antiproton. What is the nature of this enhancement? A natural interpretation can be performed in terms of a classical model of nucleon-antinucleon interactions based on G-parity transformation. The observed proton-antiproton structure is the consequence of the strong attraction in the singlet S-wave state related predominantly to pion exchanges. Similar attractions generate near threshold: an isospin-zero virtual (or quasi-bound) state in singlet S-wave, an isospin-one quasi-bound state in triplet P-wave with total angular momentum one and an isospin-zero resonance in triplet P-wave with total angular momentum zero. These P-wave structures find support in the antiproton-atomic data.

Dates et versions

in2p3-00149646 , version 1 (28-05-2007)

Identifiants

Citer

S. Wycech, B. Loiseau. The antinucleon-nucleon quasi-bound states: $J/\psi$ and atomic evidence. Eighth International Conference on Low Energy Antiproton Physics (LEAP '05), May 2005, Bonn-Juelich, Germany. pp.131-136, ⟨10.1063/1.2130149⟩. ⟨in2p3-00149646⟩
6 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More