Cosmology of extended proca-nuevo
File(s)
Published version
Author(s)
de Rham, Claudia
Garcia-Saenz, Sebastian
Heisenberg, Lavinia
Pozsgay, Victor
Type
Journal Article
Abstract
Proca-Nuevo is a non-linear theory of a massive spin-1 field which enjoys a non-linearly realized constraint that distinguishes it among other generalized vector models. We show that the theory may be extended by the addition of operators of the Generalized Proca class without spoiling the primary constraint that is necessary for consistency, allowing to interpolate between Generalized Proca operators and Proca-Nuevo ones. The constraint is maintained on flat spacetime and on any fixed curved background. Upon mixing extended Proca-Nuevo dynamically with gravity, we show that the constraint gets broken in a Planck scale suppressed way. We further prove that the theory may be covariantized in models that allow for consistent and ghost-free cosmological solutions. We study the models in the presence of perfect fluid matter, and show that they describe the correct number of dynamical variables and derive their dispersion relations and stability criteria. We also exhibit, in a specific set-up, explicit hot Big Bang solutions featuring a late-time self-accelerating epoch, and which are such that all the stability and subluminality conditions are satisfied and where gravitational waves behave precisely as in General Relativity.
Date Issued
2022-03-01
Date Acceptance
2022-02-25
Citation
Journal of Cosmology and Astroparticle Physics, 2022, 2022 (3), pp.1-50
ISSN
1475-7516
Publisher
IOP Publishing
Start Page
1
End Page
50
Journal / Book Title
Journal of Cosmology and Astroparticle Physics
Volume
2022
Issue
3
Copyright Statement
© 2022 The Author(s). Published by IOP Publishing
Ltd on behalf of Sissa Medialab. Original content from
this work may be used under the terms of the Creative Commons
Attribution 4.0 licence. Any further distribution of this work must
maintain attribution to the author(s) and the title of the work,
journal citation and DO
Ltd on behalf of Sissa Medialab. Original content from
this work may be used under the terms of the Creative Commons
Attribution 4.0 licence. Any further distribution of this work must
maintain attribution to the author(s) and the title of the work,
journal citation and DO
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000776994500001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Astronomy & Astrophysics
Cosmological perturbation theory in GR and beyond
dark energy theory
Gravitational waves in GR and beyond
modified gravity
Physical Sciences
Physics
Physics, Particles & Fields
Science & Technology
theory
Publication Status
Published
Article Number
ARTN 053
Date Publish Online
2022-03-23