Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A coordinate description of partonic processes   We review a perturbative description of amplitudes in coordinate space,
aiming at an intuitive perspective on the roles of "long" and "short"
distances. We begin with coordinate-space leading regions for fixed-angle
scattering amplitudes, and develop approximations and factorizations in analogy
to similar procedures in momentum space. There are also applications to
products of Wilson lines, including the familiar cusp amplitude. We briefly
discuss cross sections from the coordinate viewpoint, and the mechanism by
which infrared singularities cancel in inclusive cross sections.

31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph