155 citations · 3.6k across the 84 of their papers we have counts for
5 papers · 1 filter
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…
Correlated curvature perturbations and magnetogenesis from the GUT gauge bosons
Konstantinos Dimopoulos
In the context of hybrid inflation at the scale of grand unification, it is shown that, if (some of) the gauge bosons of the unbroken grand unified group obtain a flat superhorizon…
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…
Warm hilltop inflation
Juan Carlos Bueno Sanchez, Mar Bastero-Gil, Arjun Berera +1
We study the low-temperature limit of warm inflation in a hilltop model. This limit remains valid up to the end of inflation, allowing an analytic description of the entire inflati…