Effects of Radiation on Primordial Non-Gaussianity

Details Effects of Radiation on Primordial Non-Gaussianity Effects of Radiation on Primordial Non-Gaussianity

2012-04-03

arxiv.org/abs/1204.0763v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Based on the talk presented in the ICGC - 2011, held at Goa during December 14 - 19, 2011 : Contribution to the proceedings fo

Scientific paper

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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