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 |
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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