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- W4320854928 abstract "Single field inflationary models are investigated within Palatini quadratic gravity represented by $R+alpha R^2$ along with a non-minimal coupling of the form $f(phi) R$ between the inflaton field $phi$ and the gravity. The treatment is performed in the Einstein frame, where the minimal coupling to gravity is recovered through conformal transformation. We consider various limits of the model with different inflationary scenarios characterized as canonical slow-roll inflation in the limit $alpha dot{phi}^2ll (1+f(phi)) $, constant-roll k-inflation for $alpha ll 1$, and slow-roll K-inflation for$ alpha gg 1$ . A cosine and exponential potential are examined with the limits mentioned above and different well-motivated non-minimal couplings to gravity. We compare the theoretical results, exemplified by the tensor-to-scalar $r$ ratio and spectral index $n_s$, with the recent observational results of Planck 2018 $&$ BICEP/Keck . Furthermore, we include the results of a new study forecast precision with which $n_s$ and $r$ can be constrained by currently envisaged observations, including CMB (Simons Observatory, CMB-S4, and LiteBIRD)" @default.
- W4320854928 created "2023-02-16" @default.
- W4320854928 creator A5019251229 @default.
- W4320854928 date "2023-02-13" @default.
- W4320854928 modified "2023-09-23" @default.
- W4320854928 title "On cosmological Inflation In Palatini $F(R,phi)$ Gravity" @default.
- W4320854928 doi "https://doi.org/10.48550/arxiv.2302.06524" @default.
- W4320854928 hasPublicationYear "2023" @default.
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