Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraining the free parameter of the high parton density effects   The high density parton effects are strongly dependent of the spatial gluon
distribution within the proton, with radius $R$, which cannot be derived from
perturbative QCD. In this paper we assume that the unitarity corrections are
present in the HERA kinematical region and constrain the value of $R$ using the
data for the proton structure function and its slope. We obtain that the gluons
are not distributed uniformly in the whole proton disc, but behave as
concentrated in smaller regions.

36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc