Scalar bispectrum beyond slow-roll in the unified EFT of inflation
Abstract
We introduce a complete formulation of the scalar bispectrum in the unified effective field theory(EFT) of inflation, which includes the Horndeski and beyond-Horndeski Gleyzes-Langlois-Piazza-Vernizzi classes, in terms of a set of simple one-dimensional integrals. These generalized slow-rollexpressions remain valid even when slow-roll is transiently violated and encompass all configurationsof the bispectrum. We demonstrate analytically that our expressions explicitly preserve the squeezed-limitconsistency relation beyond slow-roll. As an example application of our results, we compute thescalar bispectrum in a model in which potential-driven G-inflation at early times transitions tochaotic inflation at late times, showing that our expressions accurately track the bispectrum whenslow-roll is violated and conventional slow-roll approximations fail
- Authors:
-
- Univ. of Chicago, IL (United States). Enrico Fermi Inst.; Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP)
- Publication Date:
- Research Org.:
- Univ. of Chicago, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1593980
- Alternate Identifier(s):
- OSTI ID: 1461008
- Grant/Contract Number:
- SC0009924; FG02-13ER41958
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 98; Journal Issue: 2; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Passaglia, Samuel, and Hu, Wayne. Scalar bispectrum beyond slow-roll in the unified EFT of inflation. United States: N. p., 2018.
Web. doi:10.1103/PhysRevD.98.023526.
Passaglia, Samuel, & Hu, Wayne. Scalar bispectrum beyond slow-roll in the unified EFT of inflation. United States. https://doi.org/10.1103/PhysRevD.98.023526
Passaglia, Samuel, and Hu, Wayne. Thu .
"Scalar bispectrum beyond slow-roll in the unified EFT of inflation". United States. https://doi.org/10.1103/PhysRevD.98.023526. https://www.osti.gov/servlets/purl/1593980.
@article{osti_1593980,
title = {Scalar bispectrum beyond slow-roll in the unified EFT of inflation},
author = {Passaglia, Samuel and Hu, Wayne},
abstractNote = {We introduce a complete formulation of the scalar bispectrum in the unified effective field theory(EFT) of inflation, which includes the Horndeski and beyond-Horndeski Gleyzes-Langlois-Piazza-Vernizzi classes, in terms of a set of simple one-dimensional integrals. These generalized slow-rollexpressions remain valid even when slow-roll is transiently violated and encompass all configurationsof the bispectrum. We demonstrate analytically that our expressions explicitly preserve the squeezed-limitconsistency relation beyond slow-roll. As an example application of our results, we compute thescalar bispectrum in a model in which potential-driven G-inflation at early times transitions tochaotic inflation at late times, showing that our expressions accurately track the bispectrum whenslow-roll is violated and conventional slow-roll approximations fail},
doi = {10.1103/PhysRevD.98.023526},
journal = {Physical Review D},
number = 2,
volume = 98,
place = {United States},
year = {Thu Jul 19 00:00:00 EDT 2018},
month = {Thu Jul 19 00:00:00 EDT 2018}
}
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Works referencing / citing this record:
Primordial Black Holes and Local Non-Gaussianity in Canonical Inflation
text, January 2018
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