Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: GPDs and spin effects in light mesons production   Light meson electroproduction is analyzed on the basis of the handbag
approach. Our results on the cross section and spin effects are in good
agrement with experiments at HERA, COMPASS and HERMES energies. Predictions for
$A_{UT}$ asymmetry for various reactions are presented.

14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an