Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analysis of the decays $\psi^{\prime}\to {J/\psi}\pi^+\pi^-$ and
  $\eta_c^{\prime}\to {\eta_c}\pi^+\pi^-$ with the heavy quark symmetry   In this article, we study the decays $\psi^{\prime}\to {J/\psi}\pi^+\pi^-$
and $\eta_c^{\prime}\to {\eta_c}\pi^+\pi^-$ by taking into account the chiral
symmetry breaking effects, the final-state interactions and the heavy quark
symmetry. We can confront the predictions of the $\eta_c^{\prime}\to \eta_c
\pi^+\pi^-$ decay width and differential decay width with the experimental data
in the future, and obtain powerful constraints on the chiral breaking effects
and the final-state interactions, and test the heavy quark symmetry.

13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat