Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Medium modification of the nucleon axial form factor   We study the modification of the nucleon axial form factor in nuclear matter.
The internal quark substructure of the nucleon is self-consistently described
by the quark meson coupling model. We find that the axial form factor of the
bound nucleon is quenched considerably from that of the free nucleon. The axial
vector coupling constant is reduced by roughly 10% at normal nuclear matter
density and the axial form factor varies within 8% for moderate momentum
transfer.

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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
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The categories of this paper are: cs
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph