I describe a procedure by which one can transform scattering amplitudes computed in the four dimensional helicity scheme into properly renormalized amplitudes in the 't Hooft-Veltman scheme. I describe a new renormalization program, based upon that of the dimensional reduction scheme and explain how to remove both finite and infrared-singular contributions of the evanescent degrees of freedom to the scattering amplitude.
@article{arxiv.1205.4015,
title = {The Four Dimensional Helicity Scheme Beyond One Loop},
author = {William B. Kilgore},
journal= {arXiv preprint arXiv:1205.4015},
year = {2013}
}