Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Description and interpretation of DVCS measurements   Having in mind the well-known limitations of certain models of generalized
parton distributions (GPDs), we show that the allegedly universal GPDs,
describing both deeply virtual Compton scattering (DVCS) and deeply virtual
meson production (DVMP) data, fail to describe measurements of deep inelastic
scattering. We present a new global DVCS fit that describes reasonably the
world data set, which includes now also new measurements from Hall A and CLAS
collaborations. We also explicitly illustrate that Compton form factors (CFFs)
cannot be unambiguously extracted from photon electroproduction measurements
off unpolarized proton alone and we argue that it is more reliable to interpret
such measurements in terms of certain CFF combinations, where still some care
is needed in order to estimate the propagated error.

18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int