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arXiv · 2412.19030

Inflationary observables in $F(R)$ gravity

Enrique Diaz·Oscar Meza-Aldama
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Abstract

We present phenomenological signatures for a modified gravity model f(R), constructed with linear, quadratic, cubic and quartic terms. The obtained signatures satisfy current phenomenological bounds reported by PLANCK and BICEP3. Furthermore, two of the model solutions $\sigma_1$ and $\sigma_2$ seem to favor a much lower value for the tensor-to-scalar ratio $0.0005<r_{\sigma_1}<0.0015$ and $r_{\sigma_2}<0.00015$ than the current reported experimental bounds. The results we obtained are quantitatively similar to those presented in previous studies for $R^3$ models.

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Enrique Diaz, Oscar Meza-Aldama. 2024-12-26. Inflationary observables in $F(R)$ gravity. https://arxiv.org/abs/2412.19030

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