Plateau Inflation from Random Non-Minimal Coupling
| Autor: | Broy, Benedict J., Coone, Dries, Roest, Diederik |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | JCAP06 (2016) 036 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1475-7516/2016/06/036 |
| Popis: | A generic non-minimal coupling can push any higher-order terms of the scalar potential sufficiently far out in field space to yield observationally viable plateau inflation. We provide analytic and numerical evidence that this generically happens for a non-minimal coupling strength $\xi$ of the order $N_e^2$. In this regime, the non-minimally coupled field is sub-Planckian during inflation and is thus protected from most higher-order terms. For larger values of $\xi$, the inflationary predictions converge towards the sweet spot of PLANCK. The latter includes $\xi\simeq 10^4$ obtained from CMB normalization arguments, thus providing a natural explanation for the inflationary observables measured. Comment: 9 pages, twocolumn, some figures; v2: 1 figure and appendix added, jcap layout |
| Databáze: | arXiv |
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