Feasibility study for the measurement of $\pi N$ TDAs at PANDA in $\bar{p}p\to J/\psi\pi^0$

TL;DR

This study assesses the feasibility of measuring $ar{p}p o J/Apsi\u03C0^0$ at PANDA, demonstrating that with realistic data collection, the experiment can effectively constrain $Api N$ TDAs using QCD factorization.

Contribution

It provides a detailed feasibility analysis for measuring charmonium production and $Api N$ TDAs at PANDA, including simulation results on signal detection and background rejection.

Findings

Measurement feasible within 4-5 months at maximum luminosity.

Significant constraining power on $Api N$ TDAs achievable.

Effective background suppression demonstrated through simulations.

Abstract

The exclusive charmonium production process in $\bar{p}p$ annihilation with an associated $\pi^0$ meson $\bar{p}p\to J/\psi\pi^0$ 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 PANDA (AntiProton ANnihilation at DArmstadt) experiment is investigated. Simulations on signal reconstruction efficiency as well as the background rejection from various sources including the $\bar{p}p\to\pi^+\pi^-\pi^0$ and $\bar{p}p\to J/\psi\pi^0\pi^0$ reactions are performed with PandaRoot, the simulation and analysis software framework of the PANDA experiment. It is shown that the measurement can be done at PANDA 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.