Search for baryonium and the physics at FAIR

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.