Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: QCD-oriented nondiagonal GVDM   The nondiagonal generalized vector dominance model (GVDM) of photoabsorption
is elaborated using QCD-motivated picture of the (gamma)-(q,anti q) -
transition and subsequent meson dominated scattering of the (q, anti q)-pair on
the nucleon. The relativistic constituent quark model for a description of the
meson (q, anti q)-wave functionsis used. The meson-nucleon scattering is
calculated in the two-gluon exchange approximation. It is shown that the
destructive interference effects and corresponding cancellations in the
photoabsorption cross section formula are small, so the GVDM predictions are
incorrect if no extra cut-off factors in GVDM formulas are introduced.

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The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin