The exclusive charmonium production process in $\overline{p}p$ annihilation with an associated ${\pi }^0$ meson $\overline{p}p\to J/\psi {\pi }^0$ is studied in the framework of QCD collinear factorization. The feasibility of measuring this reaction through the $J/\psi \to e^{+}{e}^{-}$ decay channel with the AntiProton ANnihilation at DArmstadt ($\overline{\mathsf{P}}\mathsf{ANDA}$) experiment is investigated. Simulations on signal reconstruction efficiency as well as the background rejection from various sources including the $\overline{p}p\to {\pi }^{+}{\pi }^{-}{\pi }^0$ and $\overline{p}p\to J/\psi {\pi }^0{\pi }^0$ reactions are performed with PandaRoot, the simulation and analysis software framework of the $\overline{\mathsf{P}}\mathsf{ANDA}$ experiment. It is shown that the measurement can be done at $\overline{\mathsf{P}}\mathsf{ANDA}$ with significant constraining power under the assumption of an integrated luminosity attainable in four to five months of data taking at the maximum design luminosity.

• Received 10 October 2016

DOI:https://doi.org/10.1103/PhysRevD.95.032003