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2008

Anisotropic non-Gaussianity from vector field perturbations

Karciauskas, Mindaugas, Dimopoulos, Konstantinos, Lyth, David H.

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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.

Anisotropic non-Gaussianity from vector field perturbations · Around

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