Anisotropic non-Gaussianity from vector field perturbations
Anisotropic non-Gaussianity from vector field perturbations
复制标题
矢量场扰动的各向异性非高斯性
DOI:
10.1103/physrevd.80.023509
复制
发表时间:
2008
影响因子:
5
通讯作者:
D. Lyth
中科院分区:
文献类型:
--
作者:
Mindaugas Karčiauskas;K. Dimopoulos;D. Lyth
We suppose that a vector field perturbation causes part of the primordial curvature perturbation. The non-Gaussianity parameter f_NL 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.