Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Origins of parton correlations in nucleon and multi-parton collisions   We demonstrate that perturbative QCD leads to positive 3D parton--parton
correlations inside nucleon explaining a factor two enhancement of the cross
section of multi-parton interactions observed at Tevatron at $x_i\ge 0.01$ as
compared to the predictions of the independent parton approximation. We also
find that though perturbative correlations decrease with $x$ decreasing, the
nonperturbative mechanism kicks in and should generate correlation which, at
$x$ below $10^{-3}$, is comparable in magnitude with the perturbative one for
$x\sim 0.01$.

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The categories of this paper are: bayes-an
16
The categories of this paper are: stat
2
The categories of this paper are: math
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas