Psi to N Nbar m

TL;DR

This paper discusses how charmonium decays to nucleon-antinucleon-light meson final states can inform N* spectroscopy, cross section estimates for charmonium production, and meson-nucleon coupling measurements, with comparisons to experimental data.

Contribution

It presents a novel analysis of Psi decays to N Nbar m states, linking decay data to N* spectroscopy, production cross sections, and meson-nucleon couplings, including model comparisons.

Findings

Decay data can estimate cross sections for p pbar to Psi m.

Results provide insights into N* spectroscopy and meson-nucleon couplings.

Comparison of hadron pole model with experimental data shows reasonable agreement.

Abstract

In this invited talk I discuss two recent applications of charmonium (Psi) decays to N Nbar m final states, where N is a nucleon and m is a light meson. There are several motivations for studying these decays: 1) They are useful for the study of N* spectroscopy; 2) they can be used to estimate cross sections for the associated charmonium production processes p pbar to Psi m, which PANDA plans to exploit in searches for charmonium hybrid exotics; and 3) they may allow the direct experimental measurement of NNm (meson-nucleon) strong couplings, which provide crucial input information for meson exchange models of the NN force. The latter two topics are considered in this talk, which will also compare results from a simple hadron pole model of these decays to recent experimental data.