The baryon spectroscopy from Jψ decays Original Research Article

View the MathML source decay at Beijing Electron-Positron Collider (BEPC) is well known as the best place for looking for glueballs. But in fact it is also an excellent place for studying N∗ and hyperon physics. For View the MathML source, and View the MathML source the πN and ππN systems are limited to be pure isospin View the MathML source due to isospin conservation. This is a big advantage in studying N∗ resonances from View the MathML source decays, compared with the πN and γN experiments which suffer difficulty on the isospin decomposition of View the MathML source and View the MathML source. There are also plenty other decay modes of View the MathML source involving baryon-antibaryon pairs plus mesons which can be used to study N∗ and hyperon resonances, e.g., looking for the “missing” N∗ states from View the MathML source, View the MathML source, View the MathML source, etc.; studying N∗(1535) → ηp from View the MathML source and studying Λ(1405) → Σπ from View the MathML source. It provides a new way to study the internal structure of baryon resonances. The newest progress and outlook in this field are presented.