Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible interpretations of the $P_c(4312)$, $P_c(4440)$, and
  $P_c(4457)$   Based on our previous QCD sum rule studies on hidden-charm pentaquark states,
we discuss possible interpretations of the $P_c(4312)$, $P_c(4440)$, and
$P_c(4457)$, which were recently observed by LHCb. Our results suggest that the
$P_c(4312)$ can be well interpreted as the $[\Sigma_c^{++} \bar D^-]$ bound
state with $J^P = 1/2^-$, while the $P_c(4440)$ and $P_c(4457)$ can be
interpreted as the $[\Sigma_c^{+} \bar D^0]$ bound state with $J^P = 1/2^-$,
the $[\Sigma_c^{*++} \bar D^{-}]$ and $[\Sigma_c^{+} \bar D^{*0}]$ bound states
with $J^P = 3/2^-$, or the $[\Sigma_c^{*+} \bar D^{*0}]$ bound state with $J^P
= 5/2^-$. We propose to measure their spin-parity quantum numbers to verify
these assignments.

37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom