Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Molecular Quarkonium   I discuss topics related to four-quark states of the `molecular quarkonium'
type, i.e. resonances that could be considered as (dominantly) made from a
heavy meson and antimeson. Of the so far observed resonances such picture is
very likely applicable to the state X(3872), and I also discuss its possible
relevance to the peak near the $D^* {\bar D}^*$ threshold in $e^+e^-$
annihilation.

35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga