Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Partial wave analysis of $J/\psi \to \gamma \eta^{\prime} \eta^{\prime}$   Using a sample of $(10.09~\pm~0.04)\times10^{9} ~J/\psi$ events collected
with the BESIII detector, a partial wave analysis of
$J/\psi\to\gamma\eta^{\prime}\eta^{\prime}$ is performed. The masses and widths
of the observed resonances and their branching fractions are reported. The main
contribution is from $J/\psi\rightarrow\gamma f_0(2020)$ with
$f_0(2020)\rightarrow\eta^{\prime}\eta^{\prime}$, which is found with a
significance of greater than 25$\sigma$. The product branching fraction ${\cal
B}\left(J/\psi\rightarrow\gamma f_0(2020)\right)\cdot{\cal
B}\left(f_0(2020)\rightarrow\eta^{\prime}\eta^{\prime}\right)$ is measured to
be $(2.63\pm0.06({\rm stat.})^{+0.31}_{-0.46}({\rm syst.}))\times10^{-4}$.

22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph