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Spiral Inflation

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arxiv 1412.2724 v3 pith:OIAN3PZU submitted 2014-12-08 hep-ph astro-ph.CO

classification hep-phastro-ph.CO
keywords inflationplanckspiralaroundbreakingdataevenfield
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abstract

We propose a novel scenario of primordial inflation in which the inflaton goes through a spiral motion starting from around the top of a symmetry breaking potential. We show that, even though inflation takes place for a field value much smaller than Planck scale, it is possible to obtain relatively large tensor to scalar ratio ($r \sim 0.1$) without fine tuning. The inflationary observables perfectly match Planck data.

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  1. Fat Inflatons, Large Turns and the $\eta$-problem

    hep-th 2019-08 conditional novelty 5.0 of 10

    Heavy scalar fields can still drive slow-roll inflation if the trajectory turns rapidly, evading the eta-problem; a D5-brane in a warped throat provides a concrete realization.

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