Hierarchical axion inflation

Ido Ben-Dayan; Francisco Gil Pedro; Alexander Westphal

doi:10.1103/PhysRevLett.113.261301

Hierarchical axion inflation

Ido Ben-Dayan, Francisco Gil Pedro, Alexander Westphal

Research output: Contribution to journal › Article › peer-review

48 Scopus citations

Abstract

We propose a new field theory mechanism for generating an effective trans-Planckian decay constant from sub-Planckian ones. Using the minimal two axions and a hierarchy between two axion decay constants is sufficient for realizing inflation through nonperturbative effects only and with minimal tuning. The inflationary motion is kept entirely within a sub-Planckian domain. We outline possible strategies of embedding the model in a string theory setup.

Original language	English
Article number	261301
Journal	Physical Review Letters
Volume	113
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.113.261301
State	Published - 23 Dec 2014
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.113.261301

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title = "Hierarchical axion inflation",

abstract = "We propose a new field theory mechanism for generating an effective trans-Planckian decay constant from sub-Planckian ones. Using the minimal two axions and a hierarchy between two axion decay constants is sufficient for realizing inflation through nonperturbative effects only and with minimal tuning. The inflationary motion is kept entirely within a sub-Planckian domain. We outline possible strategies of embedding the model in a string theory setup.",

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AB - We propose a new field theory mechanism for generating an effective trans-Planckian decay constant from sub-Planckian ones. Using the minimal two axions and a hierarchy between two axion decay constants is sufficient for realizing inflation through nonperturbative effects only and with minimal tuning. The inflationary motion is kept entirely within a sub-Planckian domain. We outline possible strategies of embedding the model in a string theory setup.

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Hierarchical axion inflation

Abstract

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