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- W2000815291 abstract "Density perturbations generated from inflation almost always have a spectral index ${n}_{s}$ which runs (varies with the wavelength). We explore a running spectral index scenario in which the scalar spectral index runs from blue (${n}_{s}>1$) on large length scales to red (${n}_{s}<1$) on short length scales. Specifically, we look for a correlation between the length scale at which ${n}_{s}ensuremath{-}1=0$ and the length scale at which tensor to scalar ratio $mathcal{T}/mathcal{S}$ reaches a minimum for single field slow-roll inflationary models. By computing the distribution of length scale ratios, we conclude that there indeed is a new approximate consistency condition that is characteristic of running spectral index scenarios that run from blue to red. Specifically, with strong running, we expect 96% of the slow-roll models to have the two length scales to be within a factor of 2, with the length scale at which the tensor to scalar ratio reaching a minimum longer than the wavelength at which ${n}_{s}ensuremath{-}1=0$." @default.
- W2000815291 created "2016-06-24" @default.
- W2000815291 creator A5083191806 @default.
- W2000815291 creator A5087343666 @default.
- W2000815291 date "2006-05-17" @default.
- W2000815291 modified "2023-09-27" @default.
- W2000815291 title "Approximate consistency condition from a running spectral index in slow-roll inflationary models" @default.
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- W2000815291 doi "https://doi.org/10.1103/physrevd.73.103510" @default.
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