62 citations · 251 across the 23 of their papers we have counts for
23 papers
Dynamical Tidal Response of Non-rotating Black Holes: Connecting the MST Formalism and Worldline EFT
Hajime Kobayashi, Shinji Mukohyama, Naritaka Oshita +2
The response of a black hole (BH) to tidal forces encodes key information about the underlying gravitational theory and affects the waveform of gravitational waves emitted during b…
Exorcising ghosts with gravitational waves: cases of ghostful and ghost-free fourth-order gravity
Gaetano Lambiase, Shinji Mukohyama, Tanmay Kumar Poddar +1
General Relativity (GR) is an effective field theory valid in the infrared regime. Quadratic curvature extensions intended to probe ultraviolet physics generically propagate a mass…
Effective Field Theory of Perturbations on Arbitrary Black Hole Backgrounds with Spacelike Scalar Profile
Shinji Mukohyama, Emeric Seraille, Kazufumi Takahashi +1
We develop the effective field theory (EFT) of perturbations in the context of scalar-tensor theories with a spacelike scalar profile on arbitrary black hole backgrounds. Our const…
Constraining Cubic Curvature Corrections to General Relativity with Quasi-Periodic Oscillations
Alireza Allahyari, Liang Ma, Shinji Mukohyama +1
We investigate observational constraints on cubic curvature corrections to general relativity by analyzing quasi-periodic oscillations (QPOs) in accreting black hole systems. In pa…
Parametrized Tidal Dissipation Numbers of Non-rotating Black Holes
Hajime Kobayashi, Shinji Mukohyama, Naritaka Oshita +2
A set of tidal dissipation numbers (TDNs) quantifies the absorption of the tidal force exerted by a companion during an inspiralling phase of a binary compact object. This tidal di…
Quasinormal Modes from EFT of Black Hole Perturbations in Vector-Tensor Gravity
Shogo Tomizuka, Hajime Kobayashi, Naritaka Oshita +2
We study the dynamics of odd-parity perturbations on a static and spherically symmetric black hole background with a timelike vector field based on the effective field theory (EFT)…
Ghostly interactions in (1+1) dimensional classical field theory
Cédric Deffayet, Aaron Held, Shinji Mukohyama +1
We investigate the classical stability of two coupled scalar fields with opposite-sign kinetic terms evolving in 1+1 dimensional Minkowski spacetime. In the first part, we characte…
Inverting no-hair theorems: How requiring General Relativity solutions restricts scalar-tensor theories
Hajime Kobayashi, Shinji Mukohyama, Johannes Noller +3
Black hole solutions in general scalar-tensor theories are known to permit hair, i.e. non-trivial scalar profiles and/or metric solutions different from the ones of General Relativ…
Spherical black hole perturbations in EFT of scalar-tensor gravity with timelike scalar profile
Shinji Mukohyama, Kazufumi Takahashi, Keitaro Tomikawa +1
We study linear even-parity perturbations of static and spherically symmetric black holes with a timelike scalar profile by use of the effective field theory (EFT) approach. For il…
Cosmological perturbation theory with trinity of scalar fields
Amjad Ashoorioon, Shinji Mukohyama, Kazem Rezazadeh +1
We present an explicit formulation of cosmological perturbation theory for three-field models with a flat field space. By performing rotations to align one field with the direction…
Removing spurious degrees of freedom from EFT of gravity
Dražen Glavan, Shinji Mukohyama, Tom Zlosnik
In the effective field theory approach to gravity, the Lagrangian density for general relativity is supplemented by generally covariant terms of higher order in the Riemann tensor…
Bridging Dark Energy and Black Holes with EFT: Frame Transformation and Gravitational Wave Speed
Shinji Mukohyama, Emeric Seraille, Kazufumi Takahashi +1
Typically, constraints on parameters of the effective field theory (EFT) of dark energy have been obtained in the Jordan frame, where matter fields are minimally coupled to gravity…
(In)stability of the black hole greybody factors and ringdowns against a small-bump correction
Naritaka Oshita, Kazufumi Takahashi, Shinji Mukohyama
Recently, it has been proposed that the black hole greybody factors can be important to model ringdown spectral amplitudes. We study the stability of greybody factors against a sma…
CMB spectrum in unified EFT of dark energy: scalar-tensor and vector-tensor theories
Katsuki Aoki, Mohammad Ali Gorji, Takashi Hiramatsu +3
We study the cosmic microwave background (CMB) radiation in the unified description of the effective field theory (EFT) of dark energy that accommodates both scalar-tensor and vect…
Tidal Love Numbers from EFT of Black Hole Perturbations with Timelike Scalar Profile
Chams Gharib Ali Barura, Hajime Kobayashi, Shinji Mukohyama +3
We study static tidal Love numbers (TLNs) of a static and spherically symmetric black hole for odd-parity metric perturbations. We describe black hole perturbations using the effec…
Black holes, multiple propagation speeds, and energy extraction
Vitor Cardoso, Shinji Mukohyama, Naritaka Oshita +1
The Standard Model of particle physics predicts the speed of light to be a universal speed of propagation of massless carriers. However, other possibilities exist -- including Lore…
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,…
Minimally Modified Gravity: a Hamiltonian Construction
Shinji Mukohyama, Karim Noui
Minimally modified gravity theories are modifications of general relativity with two local gravitational degrees of freedom in four dimensions. Their construction relies on the bre…
Role of matter in extended quasidilaton massive gravity
A. Emir Gumrukcuoglu, Kazuya Koyama, Shinji Mukohyama
The extended quasidilaton theory is one of the simplest Lorentz-invariant massive gravity theories which can accommodate a stable self-accelerating vacuum solution. In this paper w…
Matter coupling in partially constrained vielbein formulation of massive gravity
Antonio De Felice, A. Emir Gümrükçüoğlu, Lavinia Heisenberg +1
We consider a consistent linear effective vielbein matter coupling without introducing the Boulware-Deser ghost in ghost-free massive gravity. This is achieved in the partially con…
Cosmology in bimetric theory with an effective composite coupling to matter
A. Emir Gumrukcuoglu, Lavinia Heisenberg, Shinji Mukohyama +1
We study the cosmology of bimetric theory with a composite matter coupling. We find two possible branches of background evolution. We investigate the question of stability of cosmo…
Cosmological perturbations in massive gravity with doubly coupled matter
A. Emir Gümrükçüoğlu, Lavinia Heisenberg, Shinji Mukohyama
We investigate the cosmological perturbations around FLRW solutions to non- linear massive gravity with a new effective coupling to matter proposed recently. Unlike the case with m…