Work

Complex factorization and recursion for one-loop amplitudes

Year: 2012

Type: article

Abstract: We consider the factorization of one-loop amplitudes at complex kinematic points. By determining the terms that are absent for real kinematics, we can construct a recursive ansatz for the purely rational pieces of one-loop amplitudes in massless theories. We illustrate this method by verifying the Bern et al. $n$-point ansatze for the single-minus one-loop amplitudes in Yang-Mills theory and by constructing the scalar contribution to the one-loop five-graviton maximal-helicity-violating scattering amplitude.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.86.085022

Authors: Sam D. Alston, David C. Dunbar, Warren B. Perkins

Institution: Swansea University

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Science and Technology Facilities Council

Award: G2990481418