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Title: The observational position of simple non-minimally coupled inflationary scenarios

We consider two classes of non-minimally coupled inflation models; those with a quadratic coupling of the inflaton to gravity, and the 'Universal Attractor' models where the coupling is connected to the potential. We make a detailed analysis of the attractor structure in the latter case, identifying a shift of the attractor from the Starobinsky point and determining conditions for approach to the attractor. We then assess the viability of the models under different interpretations of the BICEP2 experiment's detection of B-mode polarisation, finding strong constraints on the non-minimal coupling in the case where the B-modes have mostly primordial origin.
Authors:
;  [1]
  1. Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ (United Kingdom)
Publication Date:
OSTI Identifier:
22375858
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 09; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ATTRACTORS; COSMOLOGICAL INFLATION; COUPLING; DETECTION; GRAVITATION; ORIGIN; POLARIZATION; POTENTIALS