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Loop amplitudes in an extended gravity theory

David Dunbar Orcid Logo, John Godwin, Guy Jehu, Warren Perkins Orcid Logo

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

Swansea University Authors: David Dunbar Orcid Logo, John Godwin, Guy Jehu, Warren Perkins Orcid Logo

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Abstract

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

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Published in: Physics Letters B
ISSN: 0370-2693
Published: Elsevier BV 2018
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa36776
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Abstract: We extend the $S$-matrix of gravity by the addition of the minimal three-point amplitude or equivalently adding $R^3$ terms to the Lagrangian. We demonstrate how Unitarity can be used to simply examine the renormalisability of 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 theory is complementary to the $R^4$ counter-term associated with supersymmetric Lagrangians.
College: College of Science
Start Page: 41
End Page: 47