Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of the ${\psi}(1S,2S)$ and ${\eta}_{c}(1S,2S)$ weak decays into
  $DM$   Inspired by the recent measurements on the $J/{\psi}(1S)$ ${\to}$
$D_{s}{\rho}$, $D_{u}K^{\ast}$ weak decays at BESIII and the potential
prospects of the charmonium at the high-luminosity heavy-flavor experiments, we
study ${\psi}(1S,2S)$ and ${\eta}_{c}(1S,2S)$ weak decays into final states
including one charmed meson plus one light meson, considering the QCD
corrections to hadronic matrix elements with the QCD factorization. It is found
that the Cabibbo favored ${\psi}(1S,2S)$ ${\to}$ $D_{s}^{-}{\rho}^{+}$,
$D_{s}^{-}{\pi}^{+}$, $\overline{D}_{u}^{0}\overline{K}^{{\ast}0}$ decays have
branching ratios ${\gtrsim}$ $10^{-10}$, which might be accessible at the
future experiments.

35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas