Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analysis of the scalar and axial-vector heavy diquark states with QCD
  sum rules   In this article, we study the mass spectrum of the scalar and axial-vector
heavy diquark states with the QCD sum rules in a systematic way. Once the
reasonable values are obtained, we can take them as basic parameters and study
the new charmonium-like states as the tetraquark states.

16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph