Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-energy exclusive leptoproduction of vector mesons   The physics of diffractive vector meson production in virtual photon nucleon
scattering at NMC energies is reviewed. A particular attention is paid to the
physical aspects of the reaction and how they influence the observables. The
reaction is a good probe to investigate both soft exchange mechanisms and
hadronic wave functions. Extension to either HERA or ELFE kinematics is
sketched out.

10
The categories of this paper are: q-bio
2
The categories of this paper are: math
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat