Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Glueballs, hybrid and exotic mesons   We review lattice QCD results for glueballs (including a discussion of mixing
with scalar mesons), hybrid mesons and exotic mesons (such as $B_s B_s$
molecules).

14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat