Publication

What do gravitons say about (unimodular) gravity?

Mario Herrero Valea
2018
Journal Articles

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.

Official source

https://infoscience.epfl.ch/entities/publication/5c4f1748-4902-47e9-87fc-796fc0483679

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Mario Herrero Valea
2018
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5c4f1748-4902-47e9-87fc-796fc0483679

About this result

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