α-Attractors and reheating in a class of Galileon inflation

Autor:	Farhad Darabi, Kourosh Nozari, Raheleh Shojaee
Rok vydání:	2021
Předmět:	Physics Inflation (cosmology) General Relativity and Quantum Cosmology Theoretical physics Class (set theory) Space and Planetary Science Observational cosmology Attractor Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Mathematical Physics
Zdroj:	International Journal of Modern Physics D. 30:2150036
ISSN:	1793-6594 0218-2718
DOI:	10.1142/s021827182150036x
Popis:	We study cosmological inflation in a Galileon inflationary model with the E-model potential to find possible [Formula: see text]-attractors. First, we calculate evolution of the perturbations in our setup. By adopting E-model potential, we show that values of the scalar spectral index and tensor-to-scalar ratio are universal. Also, we consider the reheating phase after inflation in this model. We compare the results with the Planck data and we find some constraints on the model’s parameter space. We find that in a Galileon inflation model, the reheating phase can last longer than that in the Standard Model. Also, in this model, the larger range of temperature is corresponding to observational viable values of [Formula: see text].
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::94f8dbc64c6bef98371cb923e58b6ea5 https://doi.org/10.1142/s021827182150036x Zobrazit plný text záznamu