Primordial bispectrum and trispectrum in multifield Dirac-Born-Infeld inflation

Details Primordial bispectrum and trispectrum in multifield Dirac-Born-Infeld inflation Primordial bispectrum and trispectrum in multifield Dirac-Born-Infeld inflation

2010-04-21

arxiv.org/abs/1004.3693v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

3 pages, 1 figure; to appear in the Proceedings of the 12th Marcel Grossman Meeting, 13--18 July 2009, Paris, France.

Scientific paper

We explain the motivation and main idea of our work in reference arXiv:0907.2476 [hep-th]. We present a simple model of multifield Dirac-Born-Infeld inflation whose bispectrum exhibits a linear combination of the equilateral and local shapes, which are usually considered as separate possibilities. We also point out the presence of a particularly interesting component of the primordial trispectrum.

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