$\alpha$-Attractors and Reheating in a Non-Minimal Inflationary Model
| Autor: | Kourosh Nozari, Farhad Darabi, Raheleh Shojaee |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Inflation (cosmology)
Physics High Energy Physics - Theory Spectral index Scalar (mathematics) Astronomy and Astrophysics Astrophysics Parameter space General Relativity and Quantum Cosmology symbols.namesake Space and Planetary Science Attractor symbols Tensor Planck Scalar field Mathematical Physics Mathematical physics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | We study $\alpha$-attractor models with both E-model and T-model potential in an extended Non-Minimal Derivative (NMD) inflation where a canonical scalar field and its derivatives are non-minimally coupled to gravity. We calculate the evolution of perturbations during this regime. Then by adopting inflation potentials of the model we show that in the large N and small $\alpha$ limit, value of the scalar spectral index ns and tensor to scalar ratio r are universal. Next, we study reheating after inflation in this formalism. We obtain some constraints on the model's parameter space by adopting the results with Planck 2018. Comment: 17 pages, 7 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|