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arXiv · 1204.0763

Effects of Radiation on Primordial Non-Gaussianity

Suratna Das
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Abstract

We study the non-Gaussian features in single-field slow-roll inflationary scenario where inflation is preceded by a radiation era. In such a scenario both bispectrum and trispectrum non-Gaussianities are enhanced. Interestingly, the trispectrum in this scenario does not depend up on the slow-roll parameters and thus $\tau_{NL}$ is larger than $f_{NL}$ which can be a signature of such a pre-inflationary radiation era.

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Suratna Das. 2012-04-03. Effects of Radiation on Primordial Non-Gaussianity. https://doi.org/10.1088/1742-6596/484/1/012055

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