Published July 15, 2009 | Version v1
Journal article

Anisotropic non-Gaussianity from vector field perturbations

  • 1. Department of Physics, Lancaster University, Lancaster LA1 4YB (United Kingdom)

Description

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.

Additional details

Publishing Information

Journal Title
Physical Review. D, Particles Fields
Journal Volume
80
Journal Issue
2
Journal Page Range
p. 023509-023509.8
ISSN
0556-2821
CODEN
PRVDAQ

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
41059731
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
ANISOTROPY; COMPUTERIZED SIMULATION; DISTURBANCES; INFLATIONARY UNIVERSE; PERTURBATION THEORY; VECTOR FIELDS
Descriptors DEC
COSMOLOGICAL MODELS; MATHEMATICAL MODELS; SIMULATION

Optional Information

Notes
(c) 2009 The American Physical Society