Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tetraquarks with charm in coupled-channel formalism   The relativistic four-quark equations are found in the framework of
coupled-channel formalism. The dynamical mixing of the meson-meson states with
the four-quark states is considered. The approximate solutions of these
equations using the method based on the extraction of leading singularities of
the amplitudes are obtained. The four-quark amplitudes of cryptoexotic mesons
including the quarks of three flavours (u, d, s) and the charmed quark are
constructed. The poles of these amplitudes determine the masses of tetraquarks.
The mass values of low-lying tetraquarks are calculated.

12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th