Non-Gaussianity from Broken Symmetries

Details Non-Gaussianity from Broken Symmetries Non-Gaussianity from Broken Symmetries

2005-11-07

arxiv.org/abs/astro-ph/0511198v1

Phys.Rev.D73:023522,2006

Astronomy and Astrophysics

Astrophysics

7 pages, 1 figure

Scientific paper

10.1103/PhysRevD.73.023522

Recently we studied inflation models in which the inflaton potential is characterized by an underlying approximate global symmetry. In the first work we pointed out that in such a model curvature perturbations are generated after the end of the slow-roll phase of inflation. In this work we develop further the observational implications of the model and compute the degree of non-Gaussianity predicted in the scenario. We find that the corresponding nonlinearity parameter, $f_{NL}$, can be as large as 10^2.

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