Rescuing quartic and natural inflation in the Palatini formalism

Antoniadis, Ignatios; Karam, A.; Lykkas, A.; Pappas, T.; Tamvakis, K. (2019). Rescuing quartic and natural inflation in the Palatini formalism. Journal of cosmology and astroparticle physics, 2019(03), 005-005. Institute of Physics Publishing IOP 10.1088/1475-7516/2019/03/005

Text Antoniadis_2019_J._Cosmol._Astropart._Phys._2019_005.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (3MB)

When considered in the Palatini formalism, the Starobinsky model does not provide us with a mechanism for inflation due to the absence of a propagating scalar degree of freedom. By (non)-minimally coupling scalar fields to the Starobinsky model in the Palatini formalism we can in principle describe the inflationary epoch. In this article, we focus on the minimally coupled quartic and natural inflation models. Both theories are excluded in their simplest realization since they predict values for the inflationary observables that are outside the limits set by the Planck data. However, with the addition of the R2 term and the use of the Palatini formalism, we show that these models can be rendered viable.

Interest & Impact

Downloads

2 since deposited on 02 Jul 2019
0 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item