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2018

Primordial fluctuations and non-Gaussianities in sidetracked inflation

Garcia-Saenz, Sebastian, Renaux-Petel, Sébastien, Ronayne, John

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Heavy scalar fields can undergo an instability during inflation as a result of their kinetic couplings with the inflaton.

This is known as the geometrical destabilization of inflation, as it relies on the effect of the negative curvature of the field-space manifold overcoming the stabilizing force of the potential.
This instability can drive the system away from its original path in field space into a new inflationary attractor, a scenario that we dub sidetracked inflation.
We study this second phase and its observable consequences in several classes of two-field models.

Primordial fluctuations and non-Gaussianities in sidetracked inflation · Around

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