What do gravitons say about (unimodular) gravity?
Abstract We revisit the problem of constraining the weak field limit of the gravitational lagrangian from S-matrix properties. From unitarity and Lorentz invariance of the S-matrix of massless gravitons, we derive on-shell gauge invariance to consist on the transverse part of the linearised diffeomo...
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doaj-3bb52d7e97da484c8b2c8d321f2cba632020-11-24T21:52:58ZengSpringerOpenJournal of High Energy Physics1029-84792018-12-0120181212510.1007/JHEP12(2018)106What do gravitons say about (unimodular) gravity?Mario Herrero-Valea0Institute of Physics, Laboratory of Particle Physics and Cosmology, Ecole Polytechnique Fédérale de LausanneAbstract We revisit the problem of constraining the weak field limit of the gravitational lagrangian from S-matrix properties. From unitarity and Lorentz invariance of the S-matrix of massless gravitons, we derive on-shell gauge invariance to consist on the transverse part of the linearised diffeomorphisms group. Moreover, by looking to the interaction between sources, we conclude that there exist only two possible lagrangians that lead to a welldefined covariant interaction, corresponding to the weak field limits of General Relativity and Unimodular Gravity. Additionally, this result confirms the equivalence of the S-matrix of both theories around flat space-time.http://link.springer.com/article/10.1007/JHEP12(2018)106Classical Theories of GravityGauge SymmetryModels of Quantum Gravity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mario Herrero-Valea |
spellingShingle |
Mario Herrero-Valea What do gravitons say about (unimodular) gravity? Journal of High Energy Physics Classical Theories of Gravity Gauge Symmetry Models of Quantum Gravity |
author_facet |
Mario Herrero-Valea |
author_sort |
Mario Herrero-Valea |
title |
What do gravitons say about (unimodular) gravity? |
title_short |
What do gravitons say about (unimodular) gravity? |
title_full |
What do gravitons say about (unimodular) gravity? |
title_fullStr |
What do gravitons say about (unimodular) gravity? |
title_full_unstemmed |
What do gravitons say about (unimodular) gravity? |
title_sort |
what do gravitons say about (unimodular) gravity? |
publisher |
SpringerOpen |
series |
Journal of High Energy Physics |
issn |
1029-8479 |
publishDate |
2018-12-01 |
description |
Abstract We revisit the problem of constraining the weak field limit of the gravitational lagrangian from S-matrix properties. From unitarity and Lorentz invariance of the S-matrix of massless gravitons, we derive on-shell gauge invariance to consist on the transverse part of the linearised diffeomorphisms group. Moreover, by looking to the interaction between sources, we conclude that there exist only two possible lagrangians that lead to a welldefined covariant interaction, corresponding to the weak field limits of General Relativity and Unimodular Gravity. Additionally, this result confirms the equivalence of the S-matrix of both theories around flat space-time. |
topic |
Classical Theories of Gravity Gauge Symmetry Models of Quantum Gravity |
url |
http://link.springer.com/article/10.1007/JHEP12(2018)106 |
work_keys_str_mv |
AT marioherrerovalea whatdogravitonssayaboutunimodulargravity |
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1725873712626925568 |