Year: 2025
Type: article
Abstract: Here, the quartic inflationary potential [Formula: see text] within a noncanonical framework characterized by a power-law Lagrangian is investigated. We demonstrate that the predictions of this model align with the Planck 2018 observational data. We explore how the predictions of the model depend on the noncanonical parameter [Formula: see text] and the number of e-folds N. Notably, the sound speed, non-Gaussianity parameter, scalar spectral index and tensor-to-scalar ratio are all affected by variations in [Formula: see text]. However, the scalar spectral index exhibits a degeneracy with respect to variation in [Formula: see text], which can be broken by incorporating reheating consideration. By applying a combination of theoretical and observational constraints on [Formula: see text], non-Gaussianity, and reheating parameters, we find that the duration of inflation is constrained to the range [Formula: see text] e-folds for [Formula: see text]. Finally, we investigate relic gravitational waves and demonstrate that their energy density spectrum falls within the sensitivity range of gravitational waves detectors for this constrained range of e-folds.
Authors: Iraj Safaei, Kayoomars Karami
Institution: University of Kurdistan
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4415736431