Unified no-scale attractors

John Ellis, Dimitri V. Nanopoulos, Keith A. Olive, Sarunas Verner

Research output: Contribution to journalArticle

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Abstract

We have presented previously a general treatment of Starobinsky-like inflation in no-scale supergravity where the tensor-to-scalar ratio r = 3(1 - ns)2, and ns is the tilt of the scalar perturbations. In particular, we have shown how this scenario can be unified with modulus fixing, supersymmetry breaking and a small cosmological constant. In this paper we extend these constructions to inflationary models based on generalized no-scale structures. In particular, we consider alternative values of the curvature parameter, α < 1, as may occur if not all the complex Kähler moduli contribute to driving inflation, as well as α > 1, as may occur if complex structure moduli also contribute to driving inflation. In all cases, we combine these α-Starobinsky inflation models with supersymmetry breaking and a present-day cosmological constant, allowing for additional contributions to the vacuum energy from stages of gauge symmetry breaking.

Original languageEnglish (US)
Article number040
JournalJournal of Cosmology and Astroparticle Physics
Volume2019
Issue number9
DOIs
StatePublished - Sep 20 2019

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Keywords

  • inflation
  • supersymmetry and cosmology

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