Associated Charmonium Production in Low Energy p-pbar Annihilation

Abstract

The QCD mechanisms underlying the exclusive strong decays and hadronic production amplitudes of charmonium remain poorly understood, despite decades of study and an increasingly detaled body of experimental information. One set of hadronic channels of special interest are those that include baryon-antibaryon states. These are being investigated experimentally at BES and CLEO-c in terms of their baryon resonance content, and are also of interest for the future PANDA experiment, in which charmonium and charmonium hybrids will be produced in p-pbar annihilation in association with light mesons. In this paper we develop a simple initial-state light meson emission model of the near-threshold associated charmonium production processes p pbar -> pi0 ccbar, and evaluate the differential and total cross sections for these reactions in this model. (Here we consider the ccbar states eta_c, J/psi, psi', chi_0 and chi_1.) The predicted near-threshold cross section for p pbar -> pi0 J/psi is found to be numerically similar to two previous theoretical estimates, and is roughly comparable to the (sparse) existing data for this process. The theoretical charmonium angular distributions predicted by this model are far from isotropic, which may be of interest for PANDA detector design studies.

arXiv comment6 pages, 4 figures, uses graphicx and feynmf

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Cited by in corpus (13)

• Future Prospects for Hadron Physics at PANDA
• Production of hidden-charm strange pentaquarks $P_{cs}$ from the $K^{-}p\to J/\psi \Lambda$ reaction
• Production of X(3872) at PANDA
• Revisiting the production of charmonium plus a light meson at PANDA
• Evidence for a J/psi-ppbar Pauli Strong Coupling ?
• Probing charmonium-like state $X(3915)$ through meson photoproduction
• Meson Emission Model of Psi to N Nbar m Charmonium Strong Decays
• Implication of the observed $\psi (3770)\to p\bar{p}{\pi }^0$ for studying the $p\bar{p}\to \psi (3770){\pi }^0$ process
• The signal of $Z^{\pm }(4430)$ in nucleon-antinucleon scattering
• Production of the charmoniumlike state $Y(4220)$ through the $p\bar{p}\to Y(4220){\pi }^0$ reaction
• Branching fractions for chi_cJ -> p p-bar pi^0, p p-bar eta, and p p-bar omega
• Role of the low-lying nucleon resonances in the $p\bar{p}\to \psi \eta$ reaction
• Psi to N Nbar m