Exploration of the Tree-Level S-Matrix of Massless Particles
High Energy Physics - Theory
2016-01-20 v1 High Energy Physics - Phenomenology
Abstract
In recent years, the BCFW construction provided a very powerful tool for computing scattering amplitudes as well as it shed light on the perturbation theory structure. In this talk, we discuss the long-standing issue of the boundary term arising when the amplitudes do not vanish as some momenta are taken to infinity along some complex direction. In particular, we provide a new set of on-shell recursion relations valid for such theories and discuss its consequences on our understanding on the perturbation theory structure of the S-Matrix.
Keywords
Cite
@article{arxiv.1201.3191,
title = {Exploration of the Tree-Level S-Matrix of Massless Particles},
author = {Paolo Benincasa},
journal= {arXiv preprint arXiv:1201.3191},
year = {2016}
}
Comments
6 pages, 1 table, contribution to the proceeding of the XVII European Workshop on String Theory