Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of $D_J$ meson decays to $D^+\pi^-$, $D^0 \pi^+$ and $D^{*+}\pi^-$
  final states in pp collision   A study of $D^+\pi^-$, $D^0 \pi^+$ and $D^{*+}\pi^-$ final states is
performed using pp collision data, corresponding to an integrated luminosity of
1.0 $fb^{-1}$, collected at a centre-of-mass energy of 7 TeV with the LHCb
detector. The $D_1(2420)^0$ resonance is observed in the $D^{*+}\pi^-$ final
state and the $D^*_2(2460)$ resonance is observed in the $D^+\pi^-$, $D^0
\pi^+$ and $D^{*+}\pi^-$ final states. For both resonances, their properties
and spin-parity assignments are obtained. In addition, two natural parity and
two unnatural parity resonances are observed in the mass region between 2500
and 2800 MeV. Further structures in the region around 3000 MeV are observed in
all the $D^{*+}\pi^-$, $D^+\pi^-$ and $D^0 \pi^+$ final states.

31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th