Measurements of $J\psi$ decays into $\omega\pi^0$, $\omega\eta$, and $\omega\eta'$

TL;DR

This paper reports new measurements of the decay branching fractions of J/ψ into ωπ⁰, ωη, and ωη' using a large dataset, providing more accurate results and insights into the electromagnetic form factor of ωπ⁰.

Contribution

The study provides the first measurements of these decay modes with higher precision than previous results, including the ωπ⁰ electromagnetic form factor.

Findings

Branching fractions are higher than previous measurements.

Electromagnetic form factor of ωπ⁰ is obtained.

Large dataset of 58 million J/ψ events used.

Abstract

Based on $5.8 \times 10^7 J\psi$ events collected with BESII at the Beijing Electron-Positron Collider (BEPC), the decay branching fractions of $J\psi\to\omega\pi^0$, $\omega\eta$, and $\omega\eta'$ are measured using different $\eta$ and $\eta'$ decay modes. The results are higher than previous measurements. The $\omega\pi^0$ electromagnetic form factor is also obtained.