Photon or meson formation in $J/\psi$ decays into $p {\overline{p}}$

22 Jun 2018 Dedonder J. -P. Loiseau B. Wycech S.

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... (read more)

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  • HIGH ENERGY PHYSICS - PHENOMENOLOGY
  • HIGH ENERGY PHYSICS - EXPERIMENT
  • NUCLEAR THEORY