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Generalised scalar-tensor theories and self-tuning

Copeland, Edmund J.; Ghataore, Sukhraj; Niedermann, Florian; Padilla, Antonio

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Authors

Sukhraj Ghataore

Florian Niedermann



Contributors

Abstract

We explore a family of generalised scalar-tensor theories that exhibit self-tuning to low scale anti de Sitter vacua, even in the presence of a large cosmological constant. We are able to examine the linearised fluctuations about these vacua and compute the corresponding amplitude. Thanks to a subtle interplay between a weak scalar coupling and a low scalar mass, it is possible to exhibit self-tuning and compatibility with solar system tests of gravity without resorting to non-linearities and unreliable screening mechanisms. The weakness of the scalar coupling and the correspondingly slow response to vacuum energy phase transitions may present some interesting possibilities for connecting early universe inflation to the cancellation of vacuum energy.

Citation

Copeland, E. J., Ghataore, S., Niedermann, F., & Padilla, A. (2022). Generalised scalar-tensor theories and self-tuning. Journal of Cosmology and Astroparticle Physics, 2022(3), Article 004. https://doi.org/10.1088/1475-7516/2022/03/004

Journal Article Type Article
Acceptance Date Feb 7, 2022
Online Publication Date Mar 1, 2022
Publication Date 2022-03
Deposit Date May 19, 2022
Publicly Available Date May 19, 2022
Journal Journal of Cosmology and Astroparticle Physics
Electronic ISSN 1475-7516
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 2022
Issue 3
Article Number 004
DOI https://doi.org/10.1088/1475-7516/2022/03/004
Keywords Astronomy and Astrophysics
Public URL https://nottingham-repository.worktribe.com/output/7832858
Publisher URL https://iopscience.iop.org/article/10.1088/1475-7516/2022/03/004
Additional Information Article Title: Generalised scalar-tensor theories and self-tuning; Journal Title: Journal of Cosmology and Astroparticle Physics; Article Type: paper; Copyright Information: © 2022 The Author(s); Date Received: 2021-12-21; Date Accepted: 2022-02-07; Online publication date: 2022-03-01

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