The three-loop cusp anomalous dimension in QCD
High Energy Physics - Phenomenology
2015-03-05 v1 High Energy Physics - Theory
Abstract
We present the full analytic result for the three-loop angle-dependent cusp anomalous dimension in QCD. With this result, infrared divergences of planar scattering processes with massive particles can be predicted to that order. Moreover, we define a closely related quantity in terms of an effective coupling defined by the light-like cusp anomalous dimension. We find evidence that this quantity is universal for any gauge theory, and use this observation to predict the non-planar -dependent terms of the four-loop cusp anomalous dimension.
Cite
@article{arxiv.1409.0023,
title = {The three-loop cusp anomalous dimension in QCD},
author = {Andrey Grozin and Johannes M. Henn and Gregory P. Korchemsky and Peter Marquard},
journal= {arXiv preprint arXiv:1409.0023},
year = {2015}
}
Comments
5 pages, 2 figures