Running Non-Gaussianities in DBI Inflation
Astrophysics
2009-11-13 v3 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
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.
Keywords
Cite
@article{arxiv.astro-ph/0507053,
title = {Running Non-Gaussianities in DBI Inflation},
author = {Xingang Chen},
journal= {arXiv preprint arXiv:astro-ph/0507053},
year = {2009}
}
Comments
17 pages; v3, a numerical correction in f_NL, references added, PRD version