  The measurements of the $J/\psi \rightarrow \gamma p \overline{p}$ decays by
the BES Collaboration indicate an enhancement at the $p \overline{p}$ threshold
which, however, is not present in the J/$\psi$ decays into $\omega p
\overline{p}$ and into $\pi p \overline{p}$. Here, two processes for describing
the decays $J/\psi \rightarrow \mathcal{B} p \overline{p}$ where $\mathcal{B} =
\gamma, \omega$ are presented in some detail and the cases $\mathcal{B} =\phi,
\pi $ are briefly touched on. The first one, applied not only to the radiative
decay to reproduce the threshold peak but also to the $\omega p \overline{p}$
decay channel to improve the description of the spectrum, postulates a direct
emission of the boson before the baryon pair is formed. The second process
assumes that the boson $\mathcal{B}$ is emitted from the baryon pair following
the $J/\psi$ decay and includes for the decays into $\gamma p \overline{p}$ a
final state nucleon-antinucleon interaction based on the Paris $N \overline{N}$
potential. The reproduction of the $p \overline{p}$ distribution in the $J/\psi
\rightarrow \omega p \overline{p}$ decays needs a final state interaction
involving a $N(2050)\ 3/2^-$ resonance. The photon- and meson-emission rates
are reproduced in a semi-quantitative way.
