Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The QCD gluon ladders and HERA structure function   We report on the extension of the data fitting considering the QCD inspired
model based on the summation of gluon ladders applied to the $ep$ scattering.
In lines of a two Pomeron approach, the structure function $F_2$ has a hard
piece given by the model and the remaining soft contribution: a soft Pomeron
and non-singlet content. In this contribution, we carefully estimate the
relative role of the hard and the soft pieces from a global fit in a large span
of $x$ and $Q^2$.

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The categories of this paper are: q-fin
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex