Search for baryonium and the physics at FAIR
Slawomir Wycech, Jean-Pierre Dedonder, Benoit Loiseau

TL;DR
This paper investigates the potential existence of nucleon-antinucleon quasi-bound states, using the Paris-potential model to interpret experimental evidence from J/psi decays and proposing future verification methods.
Contribution
It introduces a traditional Paris-potential model explanation for nucleon-antinucleon quasi-bound states observed in J/psi decay modes.
Findings
Prediction of broad S-wave and narrow P-wave quasi-bound states
Interpretation of experimental evidence supporting nucleon-antinucleon states
Discussion of future experimental verification methods
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.
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