On Warm Natural Inflation and Planck 2018 Constraints

We investigate natural inflation with non-minimal coupling to gravity, characterized either by a quadratic or a periodic term, within the warm inflation paradigm during the slow-roll stage, in both strong and weak dissipation limits; and show that, in the case of a T-linearly dependent dissipative t...

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Bibliographic Details
Published inUniverse (Basel) Vol. 9; no. 2; p. 80
Main Authors AlHallak, Mahmoud, Al-Said, Khalil Kalid, Chamoun, Nidal, El-Daher, Moustafa Sayem
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.02.2023
Subjects
Astronomical research
Big Bang theory
Cosmic background radiation
Energy
Gravitational waves
Gravity
natural inflation
Physics
Radiation
Symmetry
warm inflation
Syria
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Summary:We investigate natural inflation with non-minimal coupling to gravity, characterized either by a quadratic or a periodic term, within the warm inflation paradigm during the slow-roll stage, in both strong and weak dissipation limits; and show that, in the case of a T-linearly dependent dissipative term, it can accommodate the spectral index ns and tensor-to-scalar ratio r observables given by Planck 2018 constraints, albeit with a too-small value of the e-folding number to solve the horizon problem, providing, thus, only a partial solution to natural inflation issues, assuming a T-cubically dependent dissipative term can provide a solution to this e-folding number issue.
ISSN:2218-1997
2218-1997
DOI:10.3390/universe9020080