Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pair structure of heavy tetraquark systems   We study the pair description of heavy tetraquark systems $|QQ\bar Q \bar
Q\rangle$ in the frame of a non-relativistic potential model. By taking the two
heavy quark pairs $(Q\bar Q)$ as colored clusters, the four-quark Schr\"odinger
equation is reduced to a two-pair equation, when the inner motion inside the
pairs can be neglected. Taking into account all the Casimir scaling potentials
between two quarks and using the lattice QCD simulated mixing angle between the
two color-singlet states for the tetraquark system, we extracted a detailed
pair potential between the two heavy quark pairs.

13
The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
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The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc