Study of N*(1440) from J/Psi Decays

TL;DR

This paper explores the internal structure of the N*(1440) resonance using J/ψ decay processes, leveraging isospin conservation to study N* resonances through quark model calculations.

Contribution

It introduces a novel approach to investigate N*(1440) via J/ψ decays, providing insights into its internal quark structure through theoretical calculations.

Findings

Calculated decay processes involving N*(1440)

Implications for the quark structure of N*(1440)

Enhanced understanding of N* resonances in J/ψ decays

Abstract

For $J/\Psi\to\bar pp \pi^0$ and $\bar pp\pi^+\pi^-$, the $\pi^0p$ and $p\pi^+\pi^-$ systems are limited to be pure isospin 1/2 due to isospin conservation. This is a big advantage in studying $N^*$ resonances from $J/\Psi$ decays, compared with $\pi N$ and $\gamma N$ experiments. The process $J/\Psi\to\bar pN^*$ or $p\bar N^*$ provides a new way to probe the internal structure of the $N^*$ resonances. Here we report a quark model calculation for $J/\Psi\to\bar pp$, $pN^*(1440)$ and $\bar N^*N^*$. The implication for the internal structure of $N^*(1440)$ is discussed.