Natural inflation with exponentially small tensor-to-scalar ratio
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review D"
DOI: 10.1103/physrevd.110.l061302
Abstract: We demonstrate that"natural inflation", also known as"axion inflation", can be compatible with Planck 2018 measurements of the cosmic microwave background, while predicting an exponentially small tensor-to-scalar ratio, e.g., $r\sim 10^{-15}$. The strong suppression of $r$… read more here.
Keywords: scalar ratio; inflation; natural inflation; tensor scalar ... See more keywords
How to produce an arbitrarily small tensor to scalar ratio
Sign Up to like & getrecommendations! Published in 2019 at "Modern Physics Letters A"
DOI: 10.1142/s0217732319501311
Abstract: In this paper, construct a toy a model which demonstrates that large field single scalar inflation can produce an arbitrarily small scalar to tensor ratio in the window of e-foldings recoverable from CMB experiments. This… read more here.
Keywords: ratio; produce arbitrarily; arbitrarily small; small tensor ... See more keywords