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Loop amplitudes in an extended gravity theory
,
John Godwin,
Guy Jehu,
Warren Perkins
Physics Letters B, Volume: 780, Pages: 41 - 47
Swansea University Authors:
David Dunbar , John Godwin, Guy Jehu, Warren Perkins
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DOI (Published version): 10.1016/j.physletb.2018.02.046
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....
| Published in: | Physics Letters B |
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| ISSN: | 0370-2693 |
| Published: |
Elsevier BV
2018
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa36776 |
| 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. |
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| College: |
Faculty of Science and Engineering |
| Start Page: |
41 |
| End Page: |
47 |