Role of the $N^*$(1535) in the $J/\psi\to \bar{p}\eta p$ and $J/\psi\to \bar{p}K^+\Lambda$ reactions

TL;DR

This paper investigates the role of the $N^*(1535)$ resonance in specific $J/psi$ decay reactions using a unitary chiral approach, demonstrating its effectiveness in describing experimental data and supporting its dynamic generation.

Contribution

It provides evidence that the $N^*(1535)$ can be dynamically generated within a unitary chiral framework, offering a new perspective compared to phenomenological models.

Findings

The approach describes the data well, especially the cross section ratios.

Supports the dynamic generation of the $N^*(1535)$ resonance.

Highlights differences in coupling constants from different methods.

Abstract

We study the $J/\psi\to \bar{p}\eta p$ and $J/\psi\to \bar{p}K^+\Lambda$ reactions with a unitary chiral approach. We find that the unitary chiral approach, which generates the $N^*(1535)$ dynamically, can describe the data reasonably well, particularly the ratio of the integrated cross sections. This study provides further support for the unitary chiral description of the $N^*(1535)$. We also discuss some subtle differences between the coupling constants determined from the unitary chiral approach and those determined from phenomenological studies.