Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The LbL contribution to the muon g-2 from the axial-vector mesons
  exchanges within the nonlocal quark model   The light-by-light contribution from the axial-vector (AV) mesons exchanges
to the muon anomalous magnetic moment is estimated in the framework of the
nonlocal chiral quark model. The preliminary answer for contributions from a1
and f1 mesons to (g-2)_mu is 0.34 x 10^(-11) and does not support the
Melnikov-Vainshtein estimate 2.2 x 10^(-11).

13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
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The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys