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.
Ben-Dayan, I., SOARES VERISSIMO GIL PEDRO, F.M., Westphal, A. (2014). Hierarchical Axion Inflation. PHYSICAL REVIEW LETTERS, 113, 1-5 [10.1103/PhysRevLett.113.261301].
Hierarchical Axion Inflation
Soares Verissimo Gil Pedro, Francisco;
2014
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.File in questo prodotto:
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