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Constructing gravity amplitudes from real soft and collinear factorization / David Dunbar; James H Ettle; Warren Perkins

Physical Review D, Volume: 86, Issue: 2, Start page: 026009

Swansea University Authors: David, Dunbar, Warren, Perkins

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Abstract

Soft and collinear factorisations can be used to construct expressions for amplitudes in theoriesof gravity. We generalise the “half-soft” functions used previously to “soft-lifting” functions anduse these to generate tree and one-loop amplitudes. In particular we construct expressions forMHV tree a...

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Published in: Physical Review D
ISSN: 1550-7998 1550-2368
Published: 2012
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URI: https://cronfa.swan.ac.uk/Record/cronfa8451
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Abstract: Soft and collinear factorisations can be used to construct expressions for amplitudes in theoriesof gravity. We generalise the “half-soft” functions used previously to “soft-lifting” functions anduse these to generate tree and one-loop amplitudes. In particular we construct expressions forMHV tree amplitudes and the rational terms in one-loop amplitudes in the specific context ofN = 4 supergravity. To completely determine the rational terms collinear factorisation must alsobe used. The rational terms for N = 4 have a remarkable diagrammatic interpretation as arisingfrom algebraic link diagrams.
College: College of Science
Issue: 2
Start Page: 026009