Partial wave analysis of $J/\psi \to \gamma \eta \eta$

TL;DR

This study performs a detailed partial wave analysis of $J/$ decays to $$ using a large dataset, identifying key scalar and tensor meson contributions and their properties.

Contribution

It introduces a comprehensive partial wave analysis of $J/$ decays to $$ with a large dataset, revealing dominant resonance components and their parameters.

Findings

Identified dominant $0^{++}$ and $2^{++}$ components from specific mesons.

Measured resonance parameters and branching fractions.

Provided detailed resonance contributions in $J/ o $ decays.

Abstract

Based on a sample of $2.25\times 10^{8}$ $J/\psi$ events collected with the BESIII detector at BEPCII, a full partial wave analysis on $J/\psi\to\gamma\eta\eta$ was performed using the relativistic covariant tensor amplitude method. The results show that the dominant $0^{++}$ and $2^{++}$ components are from the $f_0(1710)$, $f_0(2100)$, $f_0(1500)$, $f_2'(1525)$, $f_2(1810)$ and $f_2(2340)$. The resonance parameters and branching fractions are also presented.