In this paper, we apply reconstruction techniques to recover the potential parameters for a particular class of single-field models, the α-attractor (supergravity) models of inflation. This also allows us to derive the inflaton vacuum expectation value at horizon crossing. We show how to use this value as one of the input variables to constrain the postaccelerated inflationary phase. We assume that the tensor-to-scalar ratio r is of the order of 10-3, a level reachable by the expected sensitivity of the next-generation cosmic macrowave background (radiation) experiments.
Reconstruction of α-attractor supergravity models of inflation / DI MARCO, Alessandro; Cabella, Paolo; Vittorio, Nicola. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - ELETTRONICO. - 95:2(2017). [10.1103/PhysRevD.95.023516]
Reconstruction of α-attractor supergravity models of inflation
DI MARCO, ALESSANDRO;
2017
Abstract
In this paper, we apply reconstruction techniques to recover the potential parameters for a particular class of single-field models, the α-attractor (supergravity) models of inflation. This also allows us to derive the inflaton vacuum expectation value at horizon crossing. We show how to use this value as one of the input variables to constrain the postaccelerated inflationary phase. We assume that the tensor-to-scalar ratio r is of the order of 10-3, a level reachable by the expected sensitivity of the next-generation cosmic macrowave background (radiation) experiments.File | Dimensione | Formato | |
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