Journal article
Covariant approach to parametrized cosmological perturbations
- Abstract:
- We present a covariant formulation for constructing general quadratic actions for cosmological perturbations, invariant under a given set of gauge symmetries for a given field content. This approach allows us to analyse scalar, vector and tensor perturbations at the same time in a straightforward manner. We apply the procedure to diffeomorphism invariant single-tensor, scalar-tensor and vector-tensor theories and show explicitly the full covariant form of the quadratic actions in such cases, in addition to the actions determining the evolution of vector and tensor perturbations. We also discuss the role of the symmetry of the background in identifying the set of cosmologically relevant free parameters describing these classes of theories, including calculating the relevant free parameters for an axisymmetric Bianchi-I vacuum universe.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, pdf, 390.5KB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevD.96.064011
Authors
+ Comisión Nacional de Investigación Científica y Tecnológica
More from this funder
- Funding agency for:
- Lagos, M
- Grant:
- 1804725
+ Science and Technology Facilities Council
More from this funder
- Funding agency for:
- Tattersall, O
- Ferreira, P
- Grant:
- 1804725
- Publisher:
- American Physical Society
- Journal:
- Physical Review D More from this journal
- Volume:
- 96
- Issue:
- 6
- Pages:
- 1-25
- Publication date:
- 2017-09-17
- Acceptance date:
- 2017-06-30
- DOI:
- EISSN:
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2470-0029
- ISSN:
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2470-0010
- Keywords:
- Pubs id:
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pubs:708244
- UUID:
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uuid:dd1b9972-d3d4-4401-9dbb-bc4f3b6f247d
- Local pid:
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pubs:708244
- Source identifiers:
-
708244
- Deposit date:
-
2017-12-22
Terms of use
- Copyright holder:
- © 2017 American Physical Society
- Copyright date:
- 2017
- Notes:
- This is the author accepted manuscript following peer review version of the article. The final version is available online from American Physical Society at: 10.1103/PhysRevD.96.064011
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