Running non-Gaussianities in Dirac-Born-Infeld inflation

Journal Article · Thu Dec 15 04:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.123518· OSTI ID:20774516

Xingang, Chen ^[1]

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1. Institute for Fundamental Theory, Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)

We study the non-Gaussianity in the simplest infrared model of the Dirac-Born-Infeld (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 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.

• OSTI ID: 20774516
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 12 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BORN-INFELD THEORY
COSMOLOGY
GEOMETRY
GRAVITATION
INFLATIONARY UNIVERSE
SENSITIVITY