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arXiv · 0912.2796

Non-Gaussianity from false vacuum inflation: Old curvaton scenario

Jinn-Ouk Gong·Chunshan Lin·Yi Wang
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Abstract

We calculate the three-point correlation function of the comoving curvature perturbation generated during an inflationary epoch driven by false vacuum energy. We get a novel false vacuum shape bispectrum, which peaks in the equilateral limit. Using this result, we propose a scenario which we call "old curvaton". The shape of the resulting bispectrum lies between the local and the false vacuum shapes. In addition we have a large running of the spectral index.

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Jinn-Ouk Gong, Chunshan Lin, Yi Wang. 2009-12-15. Non-Gaussianity from false vacuum inflation: Old curvaton scenario. https://doi.org/10.1088/1475-7516/2010/03/004

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