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Curvature Perturbations from Broken Symmetries

Edward W. Kolb, Antonio Riotto, Alberto Vallinotto

astro-pharXiv:astro-ph/0410546

Abstract

We present a new general mechanism to generate curvature perturbations after the end of the slow-roll phase of inflation. Our model is based on the simple assumption that the potential driving inflation is characterized by an underlying global symmetry which is slightly broken.

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