Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The contribution of the hadronic component of the photon into the
  $D^*$-meson photoproduction at HERA   In the framework of the vector dominance model (VDM) new contribution into
the cross-section of $D^*$-meson photoproduction at HERA has been estimated.
This contribution is due to the interaction of the virtual vector $c\bar
c$-mesons from photon with the proton. It has been shown that the mechanism
under discussion plays the essential role for all values of transverse momentum
of $D^*$-mesons at HERA. Taking into account for the contribution of this
mechanism improves the description of the experimental cross section
distribution.

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The categories of this paper are: cs
19
The categories of this paper are: eess
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics