Role of the low-lying nucleon resonances in the $p\bar{p}\to \psi \eta$ reaction

Abstract

Within the effective Lagrangian approach, we study the $p\bar{p}\to \psi \eta$ [$\psi \equiv \psi (3686)$, $J/\psi$] reaction at the low energy where the contributions from nucleon pole and low-lying nucleon resonances, $N(1520)$, $N(1535)$ and $N(1650)$ are considered. All the model parameters are determined with the help of current experimental data on the decay of $\psi \to p\bar{p}\eta$. Within the model parameters, the total and differential cross sections of the $p\bar{p}\to \psi \eta$ reaction are predicted. We show that the relative phases between different amplitudes of different nucleon resonance will change significantly the angular distributions of the $\bar{p}p\to \psi \eta$ reaction. Therefore, we conclude that these reactions are suitable to study experimentally the properties of the low-lying nucleon resonance and the reaction mechanisms. We hope that these theoretical calculations can be tested by future experiments.

8 pages, 9 figures and 3 tables. Accepted by Phys. Rev. D

References in corpus (10)

• Study of psi(2S) Decays to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} and Search for p bar{p} Threshold Enhancements
• Nucleon-Meson Coupling Constants and Form Factors in the Quark Model
• Proposal for Studying $N^{\ast }$ Resonances with $\bar{p}p\to \bar{p}n{\pi }^{+}$ Reaction
• Theoretical study on pp --> p n pi+ reaction at medium energies
• Associated Charmonium Production in Low Energy p-pbar Annihilation
• Revisiting the production of charmonium plus a light meson at PANDA
• Evidence for a J/psi-ppbar Pauli Strong Coupling ?
• Phenomenological study on the $\bar{p}N\to \bar{N}N\pi \pi$ reactions
• Meson Emission Model of Psi to N Nbar m Charmonium Strong Decays
• Production of the charmoniumlike state $Y(4220)$ through the $p\bar{p}\to Y(4220){\pi }^0$ reaction