Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Results from Charmonium Decays   Recent results from BES and CLEOc experiments on charmonium decays using
J/psi, psi' and psi'' data samples collected in e+e- annihilation are reviewed,
including the measurement of the relative phase between strong and
electromagnetic decays of psi', the study of the ``rho pi puzzle'' in J/psi and
psi' decays, and the search for the non-DDbar decays of psi''. The decays of
chi_cJ produced in psi' radiative transition are also reviewed. These new
results shed light on the understanding of QCD.

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The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ