Two-loop Splitting Amplitudes
High Energy Physics - Phenomenology
2010-11-15 v1
Abstract
Splitting amplitudes govern the behavior of scattering amplitudes at the momenta of external legs become collinear. In this talk we outline the calculation of two-loop splitting amplitudes via the unitarity sewing method. This method retains the simple factorization properties of light-cone gauge, but avoids the need for prescriptions such as the principal value or Mandelstam-Leibbrandt ones. The encountered loop momentum integrals are then evaluated using integration-by-parts and Lorentz invariance identities. We outline a variety of applications for these splitting amplitudes.
Cite
@article{arxiv.hep-ph/0407094,
title = {Two-loop Splitting Amplitudes},
author = {Z. Bern and L. J. Dixon and D. A. Kosower},
journal= {arXiv preprint arXiv:hep-ph/0407094},
year = {2010}
}
Comments
Contribution to the Proceedings of "Loops and Legs in Quantum Field Theory 2004", Zinnowitz, Usedom Island, Germany, April 2004. 5 pages, latex, espcrc2, 5 figures