Eliminating spurious poles from gauge-theoretic amplitudes

Author: 

Hodges, A

Journal: 

Journal of High Energy Physics

Publication Date: 

27 May 2013

Last Updated: 

2018-11-29T09:19:06.377+00:00

Issue: 

5

DOI: 

10.1007/JHEP05(2013)135

Volume: 

2013

page: 

n/a-

abstract: 

This note addresses the problem of spurious poles in gauge-theoretic scattering amplitudes. New twistor coordinates for the momenta are introduced, based on the concept of dual conformal invariance. The cancellation of spurious poles for a class of NMHV amplitudes is greatly simplified in these coordinates. The poles are eliminated altogether by defining a new type of twistor integral, dual to twistor diagrams as previously studied, and considerably simpler. The geometric features indicate a supersymmetric extension of the formalism at least to all NMHV amplitudes, allowing the dihedral symmetry of the super-amplitude to be made manifest. More generally, the definition of `momentum-twistor' coordinates suggests a powerful new approach to the study of scattering amplitudes.

Symplectic id: 

356584

Submitted to ORA: 

Not Submitted

Publication Type: 

Journal Article