Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Open charm production at high energies and the quark Reggeization
  hypothesis   We study open charm production at high energies in the framework of the
quasi-multi-Regge-kinematics approach applying the quark-Reggeization
hypothesis implemented with Reggeon-Reggeon-particle and
Reggeon-particle-particle effective vertices. Adopting the Kimber-Martin-Ryskin
unintegrated quark and gluon distribution functions of the proton and photon,
we thus nicely describe the proton structure function F_{2,c} measured at DESY
HERA as well as the transverse-momentum distributions of D mesons created by
photoproduction at HERA and by hadroproduction at the Fermilab Tevatron.

25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph