Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dressed gluon exponentiation   Perturbative and non-perturbative aspects of differential cross-sections
close to a kinematic threshold are studied applying ``dressed gluon
exponentiation'' (DGE). The factorization property of soft and collinear gluon
radiation is demonstrated using the light-cone axial gauge: it is shown that
the singular part of the squared matrix element for the emission of an
off-shell gluon off a nearly on-shell quark is universal. We derive a
generalized splitting function that describes the emission probability and show
how Sudakov logs emerge from the phase-space boundary where the gluon
transverse momentum vanishes. Both soft and collinear logs associated with a
single dressed gluon are computed through a single integral over the
running-coupling to any logarithmic accuracy. The result then serves as the
kernel for exponentiation. The divergence of the perturbative series in the
exponent indicates specific non-perturbative corrections. We identify two
classes of observables according to whether the radiation is from an
initial-state quark, as in the Drell-Yan process, or a final-state quark,
forming a jet with a constrained invariant mass, as in fragmentation functions,
event-shape variables and deep inelastic structure functions.

32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th