Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Qunatum Number Exotic Mesons and Large N QCD   Exotic mesons with quantum numbers of a hybrid ($\bar{q} q g$) such as
$J^{PC} = 1^{-+}$are shown to exist as narrow resonant states in the large
$N_c$ limit of QCD. The width of these states is proportional to $1/N_c$.
Possible phenomenological implications for the world of $N_c=3$ are discussed.

21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci