Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Overview on All Reactions Linked to GPDs   A short overview is given on how generalized parton distributions (GPDs)
enter in a variety of hard exclusive processes such as deeply virtual Compton
scattering (DVCS) and hard meson electroproduction reactions on the nucleon. We
firstly discuss the links between GPDs and elastic nucleon form factors which
represent powerful constraints on parametrizations of GPDs. Subsequently, we
show some key observables which are sensitive to the various hadron structure
aspects of the GPDs, and which are at present under experimental investigation
at different facilities (HERMES, H1/ZEUS, JLab and Compass), or will be
addressed by experiments in the near future.

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The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom