Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Progress on the infrared structure of multi-particle gauge theory
  amplitudes   I will review some of the recent intense activity concerning infrared and
collinear divergences in gauge theory amplitudes. The central quantity in these
studies is the multi-particle soft anomalous dimension matrix, which is
completely known at two loops for both massless and massive particles, and
whose properties are currently being studied at three-loops and beyond. I will
describe how, in the massless case, the simple dipole-like structure of the
anomalous dimension up to two loops can be exploited in the high-energy limit
to study effects that go beyond the standard form of Regge factorization.
Furthermore, I will briefly review some of the techniques that have recently
been developed to compute the soft anomalous dimension at high orders in
perturbation theory, and I will give some examples of applications, including a
result valid to all orders in perturbation theory for a specific class of
diagrams.

37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio