Infrared singularities in multi-leg scattering amplitudes
High Energy Physics - Phenomenology
2014-07-22 v1 High Energy Physics - Theory
Abstract
I discuss the state-of-the-art knowledge of long-distance singularities in multi-leg gauge-theory scattering amplitudes and report on an on-going calculation of the three-loop soft anomalous dimension through the renormalization of correlators of semi-infinite Wilson lines. I also discuss the non-Abelian exponentiation theorem that has been recently generalised to multiple Wilson lines and demonstrate its application in computing the soft anomalous dimension. Finally, I present recent results for multiple-gluon-exchange webs and discuss their analytic structure.
Cite
@article{arxiv.1407.5164,
title = {Infrared singularities in multi-leg scattering amplitudes},
author = {Einan Gardi},
journal= {arXiv preprint arXiv:1407.5164},
year = {2014}
}
Comments
16 page, 5 figures