Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heavy-Quark QCD Exotica   This review presents an overview of the remarkable progress in the field of
heavy-quark exotic hadrons over the past 15 years. It seeks to be pedagogical
rather than exhaustive, summarizing both the progress and specific results of
experimental discoveries, and the variety of theoretical approaches designed to
explain these new states.

22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph