Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Light-cone wave functions of mesons   A review of light-cone, covariant and gauge-invariant wave-functions of
mesons is presented. They are basic non-perturbative objects needed for hard
exclusive processes and for the method of light-cone QCD sum rules. The
emphasis is on the vector mesons and a new (model-independent) way of computing
the mass corrections of vector-meson wave functions is given.

14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio