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- W2925160904 abstract "Future observations of the cosmic microwave background polarization are expected to set an improved upper bound on the tensor-to-scalar ratio of $rensuremath{lesssim}0.03$. Recently, we showed that small field models of inflation can produce a significant primordial gravitational wave signal. We constructed viable small field models that predict a value of $r$ as high as 0.01. Models that predict higher values of $r$ are more tightly constrained and lead to larger field excursions. This leads to an increase in tuning of the potential parameters and requires higher levels of error control in the numerical analysis. Here, we present viable small field models which predict $r=0.03$. We further find the most likely candidate among these models which fit the most recent Planck data while predicting $r=0.03$. We thus demonstrate that this class of small field models is an alternative to the class of large field models. The BICEP3 experiment and the Euclid and SPHEREx missions are expected to provide experimental evidence to support or refute our predictions." @default.
- W2925160904 created "2019-04-01" @default.
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- W2925160904 date "2019-08-13" @default.
- W2925160904 modified "2023-10-14" @default.
- W2925160904 title "Small field models of inflation that predict a tensor-to-scalar ratio r=0.03" @default.
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- W2925160904 doi "https://doi.org/10.1103/physrevd.100.043522" @default.
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