| Autor: |
Sukanta Panda, Arun Rana, Rahul Thakur |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
European Physical Journal C: Particles and Fields, Vol 83, Iss 4, Pp 1-12 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
1434-6052 |
| DOI: |
10.1140/epjc/s10052-023-11459-1 |
| Popis: |
Abstract In this work, we study a constant-roll inflationary model in the Palatini formalism using modified gravity. Here our action consists a non-minimal coupling of a scalar field $$\phi $$ ϕ with Ricci scalar R in a general form of $$f(R,\phi )$$ f ( R , ϕ ) . Using Palatini approach, we write its equivalent scalar-tensor form in the Einstein frame and then apply the constant-roll condition in the equation of motion for the inflaton field. Later the tensor-to-scalar ratio and the spectral index are calculated using the slow-roll parameters and the results obtained are matched with the Planck 2018 data. We found that the results agree nicely with the observations within the parameter regime under consideration. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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