pith. sign in

arxiv: 0812.0264 · v2 · submitted 2008-12-01 · 🌌 astro-ph · hep-ph

Anisotropic non-Gaussianity from vector field perturbations

classification 🌌 astro-ph hep-ph
keywords anisotropicfieldnon-gaussianityperturbationscenariovectoranisotropycalculate
0
0 comments X
read the original abstract

We suppose that a vector field perturbation causes part of the primordial curvature perturbation. The non-Gaussianity parameter fNL is then, in general, statistically anisotropic. We calculate its form and magnitude in the curvaton scenario and in the end-of-inflation scenario. We show that this anisotropy could easily be observable.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.