Statistically anisotropic curvature perturbation generated during the waterfall
Cosmology and Nongalactic Astrophysics
2012-05-01 v1 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
If the waterfall field of hybrid inflation couples to a U(1) gauge field, the waterfall can generate a statistically anisotropic contribution to the curvature perturbation. We investigate this possibility, generalising in several directions the seminal work of Yokoyama and Soda. The statistical anisotropy of the bispectrum could be detectable by PLANCK even if the statistical anisotropy of the spectrum is too small to detect.
Keywords
Cite
@article{arxiv.1204.6619,
title = {Statistically anisotropic curvature perturbation generated during the waterfall},
author = {David H. Lyth and Mindaugas Karciauskas},
journal= {arXiv preprint arXiv:1204.6619},
year = {2012}
}
Comments
18 pages