Some inflationary models under the light of Planck 2018 results

2023/11/08 by Daniel Pozo, Pozo, Daniel, Jordan Zambrano +7 · 1 citation
Economics, Econometrics and Finance · Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #General Relativity and Quantum Cosmology (gr-qc) #Stochastic processes and financial applications

paper · pdf · doi:10.48550/arxiv.2311.04683

openalex publication_date 2023/11/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In this work we study four well-known inflationary scenarios that are reported by the most recent Planck observations: Natural inflation, Hilltop quartic inflation, Starobinsky inflationary model, and Large field power-law potentials V(ϕ)∼ ϕ^p, considering p=\sfrac23, \sfrac43. The analysis is done using both the slow-roll approximation and the numerical solution to the background and perturbation equations. We show that the numerical solution improved the precision of these models with respect to the contour plot r vs. n_\sca, having a lower r in each model compared to the value calculated from the slow-roll approximation.

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