Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral Composite Asymmetric Dark Matter   The asymmetric dark matter (ADM) scenario solves the baryon-dark matter
coincidence problem when the dark matter (DM) mass is of $\mathcal{O}(1)$GeV.
Composite ADM models based on QCD-like strong dynamics are particularly
motivated since the strong dynamics naturally provides the DM mass of
$\mathcal{O}(1)$GeV and the large annihilation cross-section simultaneously. In
those models, the sub-GeV dark photon often plays an essential role in
transferring the excessive entropy in the dark sector into the visible sector,
i.e., the Standard Model sector. This paper constructs a chiral composite ADM
model where the $U(1)_D$ gauge symmetry is embedded into the chiral flavor
symmetry. Due to the dynamical breaking of the chiral flavor symmetry, the
model naturally provides the masses of the dark photon and the dark pions in
the sub-GeV range, both of which play crucial roles for a successful ADM model.

10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
16
The categories of this paper are: stat
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
9
The categories of this paper are: nlin