179 citations · 1.2k across the 42 of their papers we have counts for
5 papers · 1 filter
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…
Exploring spin of ultralight dark matter with gravitational wave detectors
Yusuke Manita, Hiroki Takeda, Katsuki Aoki +2
We propose a novel method for distinguishing the spin of ultralight dark matter (ULDM) using interferometric gravitational wave detectors. ULDM can be a bosonic field of spin-0, 1,…
Cosmological Perturbation Theory in Metric-Affine Gravity
Katsuki Aoki, Sebastian Bahamonde, Jorge Gigante Valcarcel +1
We formulate cosmological perturbation theory around the spatially curved FLRW background in the context of metric-affine gauge theory of gravity which includes torsion and nonmetr…
Gravitational Positivity for Phenomenologists: Dark Gauge Boson in the Swampland
Katsuki Aoki, Toshifumi Noumi, Ryo Saito +4
The gravitational positivity bound gives quantitative "swampland'' constraints on low-energy effective theories inside theories of quantum gravity. We give a comprehensive discussi…
Coupled vector Gauss-Bonnet theories and hairy black holes
Katsuki Aoki, Shinji Tsujikawa
We study vector-tensor theories in which a 4-dimensional vector field is coupled to a vector quantity , which is expressed in terms of and a metric tensor $…