Factorization in One-Loop Gauge Theory
摘要
Factorization properties of one-loop gauge theory amplitudes have been used as checks on explicitly computed amplitudes and in the construction of ansatze for higher-point ones. In massless theories, such as QCD at high energies, infrared divergences complicate factorization. Here we prove that factorization in such theories is described by a set of universal functions. In particular, a proof of the universality of one-loop splitting functions as the momenta of two particles become collinear is presented. Factorization in multi-particle channels is also given. The discontinuity functions that appear in the splitting functions may also be used to obtain infrared divergent box integral functions from finite ones.
引用
@article{arxiv.hep-ph/9503236,
title = {Factorization in One-Loop Gauge Theory},
author = {Z. Bern and G. Chalmers},
journal= {arXiv preprint arXiv:hep-ph/9503236},
year = {2010}
}
备注
Minor corrections made, 51 pages including figures