Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2162
Title: Inflation with non-minimal coupling: Metric vs. Palatini formulations
Authors: Bauer, Florian
Demir, Durmuş Ali
Keywords: Scalar field theory
Metric approaches
Palatini approaches
Issue Date: 24-Jul-2008
Publisher: Elsevier Ltd.
Source: Bauer, F., and Demir, D. A. (2008). Inflation with non-minimal coupling: Metric vs. Palatini formulations. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 665(4), 222-226. doi:10.1016/j.physletb.2008.06.014
Abstract: We analyze non-minimally coupled scalar field theories in metric (second-order) and Palatini (first-order) formalisms in a comparative fashion. After contrasting them in a general setup, we specialize to inflation and find that the two formalisms differ in their predictions for various cosmological parameters. The main reason is that dependencies on the non-minimal coupling parameter are different in the two formalisms. For successful inflation, the Palatini approach prefers a much larger value for the non-minimal coupling parameter than the Metric approach. Unlike the Metric formalism, in Palatini, the inflaton stays well below the Planck scale whereby providing a natural inflationary epoch. © 2008 Elsevier B.V. All rights reserved.
URI: http://doi.org/10.1016/j.physletb.2008.06.014
http://hdl.handle.net/11147/2162
ISSN: 0370-2693
0370-2693
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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