Large Nonlocal Non-Gaussianity from a Curvaton Brane

Details Large Nonlocal Non-Gaussianity from a Curvaton Brane Large Nonlocal Non-Gaussianity from a Curvaton Brane

2010-05-02

arxiv.org/abs/1005.0127v2

Phys.Rev.D82:123501,2010

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, 2 figures

Scientific paper

10.1103/PhysRevD.82.123501

We use a generalized delta N formalism to study the generation of the primordial curvature perturbation in the curvaton brane scenario inspired by stringy compactifications. We note that the non-Gaussian features, especially the trispectra, crucially depend on the decay mechanism in a general curvaton scenario. Specifically, we study the bispectra and trispectra of the curvaton brane model in detail to illustrate the importance of curvaton decay in generating nonlinear fluctuations. When the curvaton brane moves nonrelativistically during inflation, the shape of non-Gaussianity is local, but the corresponding size is different from that in the standard curvaton scenario. When the curvaton brane moves relativistically in inflationary stage, the shape of non-Gaussianity is of equilateral type.

Affiliated with

Also associated with

No associations

Rating

Large Nonlocal Non-Gaussianity from a Curvaton Brane does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Large Nonlocal Non-Gaussianity from a Curvaton Brane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large Nonlocal Non-Gaussianity from a Curvaton Brane will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-723848