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Loop amplitudes in an extended gravity theory / David C. Dunbar; John H. Godwin; Guy R. Jehu; Warren B. Perkins

Physics Letters B, Volume: 780, Pages: 41 - 47

Swansea University Author: Perkins, Warren

Abstract

We extend the S-matrix of gravity by the addition of the minimal three-pointamplitude or equivalently adding R^3 terms to the Lagrangian. We demon-strate how Unitarity can be used to simply examine the renormalisabilityof this theory and determine the R^4 counter-terms that arise at one-loop.We find...

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Published in: Physics Letters B
ISSN: 03702693
Published: 2018
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa38995
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Abstract: We extend the S-matrix of gravity by the addition of the minimal three-pointamplitude or equivalently adding R^3 terms to the Lagrangian. We demon-strate how Unitarity can be used to simply examine the renormalisabilityof this theory and determine the R^4 counter-terms that arise at one-loop.We find that the combination of R^4 terms that arise in the extended theoryis complementary to the R^4 counter-term associated with supersymmetricLagrangians.
College: College of Science
Start Page: 41
End Page: 47