Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Axial Vector Couplings of the Nucleon in Chiral Quark Model
  Incorporating $ U(1)_A$ Anomaly Effects   Renormalization of the axial vector currents due to Goldstone loops is
studied in a simple extension of Manohar - Georgi chiral quark model which
incorporates $U(1)_A$ anomaly effects. The polarized strage quark sea in the
polarized nucleon results from different renormalization of the flavor singlet
and octet currents and is in reasonable agreement with the experiment.

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The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: physics