Search for baryonium and the physics at FAIR

Abstract

The existence of nucleon-antinucleon quasi-bound state is indicated in two decay modes of the J/psi meson studied by BES. We discuss an explanation in a fairly traditional Paris-potential model of the nucleon-antinucleon interactions. A broad, S-wave and a narrow P-wave quasi-bound states are predicted by this model. Some existing experimental evidence and possible verifications in the future are indicated.

arXiv comment5 pages, 4 figures, contribution to the 13th International Workshop on Meson Production, Properties and Interaction, Krakow, Poland, May 29 - June 3, 2014, to appear in EPJ Web of Conferences

References in corpus (7)

• Observation of a near-threshold enhancement in th p pbar mass spectrum from radiative J/psi-->gamma p pbar decays
• Observation of a resonance X(1835) in J/ψ--> γπ^+ π^- η^{\prime}
• Paris nucleon-antinucleon potential constrained by recent antiprotonic-atom data and antineutron-proton total cross sections
• Antiproton-Proton Channels in J/psi Decays
• Composition of the nuclear periphery from antiproton absorption
• ppbar enhancement in B and J/Psi decay
• On the structure of the X(1835) baryonium

Cited by in corpus (1)

• On the near-threshold $\bar{p}p$ invariant mass spectrum measured in $J/\psi$ and ${\psi }^{\prime }$ decays