128 citations · 822 across the 24 of their papers we have counts for
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Anisotropic non-Gaussianity from vector field perturbations
Mindaugas Karciauskas, Konstantinos Dimopoulos, David H. Lyth
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.…
Statistical anisotropy of the curvature perturbation from vector field perturbations
Konstantinos Dimopoulos, Mindaugas Karciauskas, David H. Lyth +1
The δN formula for the primordial curvature perturbation ζis extended to include vector as well as scalar fields. Formulas for the tree-level contributions to the spectrum and bisp…
Non-minimally coupled vector curvaton
Konstantinos Dimopoulos, Mindaugas Karciauskas
It is shown that a massive Abelian vector boson field can generate the curvature perturbation in the Universe, when coupled non-minimally to gravity, through an RA^2 coupling. The…