More on the Non-Gaussianity of Perturbations in a Nonminimal Inflationary Model
Joint Authors
Shojaee, R.
Darabi, F.
Nozari, Kourosh
Source
Advances in High Energy Physics
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-08-15
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
We study nonlinear cosmological perturbations and their possible non-Gaussian character in an extended nonminimal inflation where gravity is coupled nonminimally to both the scalar field and its derivatives.
By expansion of the action up to the third order, we focus on the nonlinearity and non-Gaussianity of perturbations in comparison with recent observational data.
By adopting an inflation potential of the form V(ϕ)=1/nλϕn, we show that, for n=4, for instance, this extended model is consistent with observation if 0.013<λ<0.095 in appropriate units.
By restricting the equilateral amplitude of non-Gaussianity to the observationally viable values, the coupling parameter λ is constrained to the values λ<0.1.
American Psychological Association (APA)
Shojaee, R.& Nozari, Kourosh& Darabi, F.. 2018. More on the Non-Gaussianity of Perturbations in a Nonminimal Inflationary Model. Advances in High Energy Physics،Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1117969
Modern Language Association (MLA)
Shojaee, R.…[et al.]. More on the Non-Gaussianity of Perturbations in a Nonminimal Inflationary Model. Advances in High Energy Physics No. 2018 (2018), pp.1-8.
https://search.emarefa.net/detail/BIM-1117969
American Medical Association (AMA)
Shojaee, R.& Nozari, Kourosh& Darabi, F.. More on the Non-Gaussianity of Perturbations in a Nonminimal Inflationary Model. Advances in High Energy Physics. 2018. Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1117969
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1117969