Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nature of the $a_1$ meson in lattice quantum chromodynamics studied with
  chiral fermions   We study the $a_1$ meson using a quenched lattice quantum chromodynamics
simulation with the truncated overlap fermions formalism based on the domain
wall fermions. The obtained lightest mass of the $a_1$ meson, 1272(45) MeV, is
consistent with the experimental value for $a_1$(1260). Thus, $a_1$(1260) can
be identified to have a simple two-body constituent-quark structure. Our
quenched simulation result of $a_1$(1420) can not explain the experimental mass
value, which suggests $a_1$(1420) is not a simple $q\bar{q}$ two quark state.

21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
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The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph