Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vector Meson Dominance and Free Quarks   We study the electromagnetic pion form factor and the VV - AA two point
function for momenta -(600 MeV)^2 < q^2 < (600 MeV)^2 and we note the
similarity between vector meson dominance and two versions of the free
constituent quark model. The similarity is more striking when the momentum
dependence of the quark mass is taken into account. We consider the
implications for QCD and other theories.

9
The categories of this paper are: nlin
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg