Running Non-Gaussianities in DBI Inflation

Details Running Non-Gaussianities in DBI Inflation Running Non-Gaussianities in DBI Inflation

2005-07-03

arxiv.org/abs/astro-ph/0507053v3

Phys.Rev.D72:123518,2005

Astronomy and Astrophysics

Astrophysics

17 pages; v3, a numerical correction in f_NL, references added, PRD version

Scientific paper

10.1103/PhysRevD.72.123518

We study the non-Gaussianity in the simplest infrared (IR) model of the DBI inflation. We show that the non-Gaussianity in such a model is compatible with the current observational bound, and is within the sensitivity of future experiments. We also discuss the scale dependence of the non-Gaussianity. In the DBI inflation, such a feature can be used as a probe to the properties of the background geometry of the extra dimensions or internal space.

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