Cosmological attractors from alpha-scale supergravity

Diederik Roest*, Marco Scalisi

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

84 Citations (Scopus)
49 Downloads (Pure)

Abstract

The Planck value of the spectral index can be interpreted as n(s) = 1 - 2/N in terms of the number of e-foldings N. An appealing explanation for this phenomenological observation is provided by alpha-attractors: the inflationary predictions of these supergravity models are fully determined by the curvature of the Kahler manifold. We provide a novel formulation of alpha-attractors which only involves a single chiral superfield. Our construction involves a natural deformation of no-scale models and employs these to construct a de Sitter plateau with an exponential falloff. Finally, we show how analogous structures with a flat Kahler geometry arise as a singular limit of such alpha-scale models.

Original languageEnglish
Article number043525
Number of pages6
JournalPhysical Review D
Volume92
Issue number4
DOIs
Publication statusPublished - 28-Aug-2015

Keywords

  • CHAOTIC INFLATION
  • STANDARD MODEL

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