Quasi-single field inflation in the non-perturbative regime
Abstract
In quasi-single field inflation there are massive fields that interact with the inflaton field. If these other fields are not much heavier than the Hubble constant during inflation (H) these interactions can lead to important consequences for the cosmological energy density perturbations. The simplest model of this type has a real scalar inflaton field that interacts with another real scalar S (with mass m). In this model there is a mixing term of the form μ S, where π is the Goldstone fluctuation that is associated with the breaking of time translation invariance by the time evolution of the inflaton field during the inflationary era. In this paper we study this model in the region (μ/H)2 + (m/H)2 > 9/4 and m/H~O(1) or less. For a large part of the parameter space in this region standard perturbative methods are not applicable. In conclusion using numerical and analytic methods we study how large μ/H has to be for the large μ/H effective field theory approach to be applicable.
- Authors:
-
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Walter Burke Institute for Theoretical Physics
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1501459
- Grant/Contract Number:
- SC0011632
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 6; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS; Cosmology of Theories beyond the SM; Effective Field Theories
Citation Formats
An, Haipeng, McAneny, Michael, Ridgway, Alexander K., and Wise, Mark B. Quasi-single field inflation in the non-perturbative regime. United States: N. p., 2018.
Web. doi:10.1007/jhep06(2018)105.
An, Haipeng, McAneny, Michael, Ridgway, Alexander K., & Wise, Mark B. Quasi-single field inflation in the non-perturbative regime. United States. https://doi.org/10.1007/jhep06(2018)105
An, Haipeng, McAneny, Michael, Ridgway, Alexander K., and Wise, Mark B. Wed .
"Quasi-single field inflation in the non-perturbative regime". United States. https://doi.org/10.1007/jhep06(2018)105. https://www.osti.gov/servlets/purl/1501459.
@article{osti_1501459,
title = {Quasi-single field inflation in the non-perturbative regime},
author = {An, Haipeng and McAneny, Michael and Ridgway, Alexander K. and Wise, Mark B.},
abstractNote = {In quasi-single field inflation there are massive fields that interact with the inflaton field. If these other fields are not much heavier than the Hubble constant during inflation (H) these interactions can lead to important consequences for the cosmological energy density perturbations. The simplest model of this type has a real scalar inflaton field that interacts with another real scalar S (with mass m). In this model there is a mixing term of the form μ∙πS, where π is the Goldstone fluctuation that is associated with the breaking of time translation invariance by the time evolution of the inflaton field during the inflationary era. In this paper we study this model in the region (μ/H)2 + (m/H)2 > 9/4 and m/H~O(1) or less. For a large part of the parameter space in this region standard perturbative methods are not applicable. In conclusion using numerical and analytic methods we study how large μ/H has to be for the large μ/H effective field theory approach to be applicable.},
doi = {10.1007/jhep06(2018)105},
journal = {Journal of High Energy Physics (Online)},
number = 6,
volume = 2018,
place = {United States},
year = {Wed Jun 20 00:00:00 EDT 2018},
month = {Wed Jun 20 00:00:00 EDT 2018}
}
Web of Science
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