Publications (49)
Effective Field Theory of Black Hole Perturbations in Vector-Tensor Gravity
Katsuki Aoki, Mohammad Ali Gorji, Shinji Mukohyama +2
We formulate the effective field theory (EFT) of vector-tensor gravity for perturbations around an arbitrary background with a vector profile, which can be applied…
Inflationary gravitational waves in consistent Einstein-Gauss-Bonnet gravity
Katsuki Aoki, Mohammad Ali Gorji, Shuntaro Mizuno +1
We study the slow-roll single field inflation in the context of the consistent Einstein-Gauss-Bonnet gravity that was recently proposed in \cite{Aoki:2020lig}. In addition…
A consistent theory of Einstein-Gauss-Bonnet gravity
Katsuki Aoki, Mohammad Ali Gorji, Shinji Mukohyama
We investigate the limit of the -dimensional Einstein-Gauss-Bonnet gravity, where the limit is taken with kept fixed and is the origi…
The Effective Field Theory of Vector-Tensor Theories
Katsuki Aoki, Mohammad Ali Gorji, Shinji Mukohyama +1
We investigate a systematic formulation of vector-tensor theories based on the effective field theory (EFT) approach. The input of our EFT is that the spacetime symmetry is spontan…
Effective field theory of coupled dark energy and dark matter
Katsuki Aoki, Jose Beltrán Jiménez, Masroor C. Pookkillath +1
We formulate an effective field theory (EFT) of coupled dark energy (DE) and dark matter (DM) interacting through energy and momentum transfers. In the DE sector, we exploit the EF…
Massive gravitons as dark matter and gravitational waves
Katsuki Aoki, Shinji Mukohyama
We consider the possibility that the massive graviton is a viable candidate of dark matter in the context of bimetric gravity. We first derive the energy-momentum tensor of the mas…