Minimal Composite Inflation

Preprint number: CP3-Origins-2011-6
Authors: Phongpichit Channuie (CP3-Origins), Jakob Jark Joergensen (CP3-Origins), and Francesco Sannino (CP3-Origins)
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We investigate models in which the inflaton emerges as a composite field of a four dimensional, strongly interacting and nonsupersymmetric gauge theory featuring purely fermionic matter. We show that it is possible to obtain successful inflation via non-minimal coupling to gravity, and that the underlying dynamics is preferred to be near conformal. We discover that the compositeness scale of inflation is of the order of the grand unified energy scale.