List of works - Hayato Motohashi

ANALYTIC SOLUTION FOR MATTER DENSITY PERTURBATIONS IN A CLASS OF VIABLE COSMOLOGICAL f(R) MODELS

BLACK HOLE PERTURBATION IN MODIFIED GRAVITY THEORIES

scholarly article published 29 January 2015

Black hole perturbation in nondynamical and dynamical Chern-Simons gravity

scholarly article by Hayato Motohashi & Teruaki Suyama published 23 February 2012 in Physical Review D

Black hole perturbation in parity violating gravitational theories

scholarly article by Hayato Motohashi & Teruaki Suyama published 19 October 2011 in Physical Review D

Black hole perturbation in the most general scalar-tensor theory with second-order field equations. II. The even-parity sector ⬇️

scholarly article by Tsutomu Kobayashi et al published 9 April 2014 in Physical Review D

Black hole perturbation in the most general scalar-tensor theory with second-order field equations: The odd-parity sector

article

Black hole perturbations in higher-order scalar–tensor theories: initial value problem and dynamical stability

scientific article published in 2022

Black hole ringdown from physically sensible initial value problem in higher-order scalar-tensor theories

scholarly article

Caustics for spherical waves ⬇️

scholarly article

Consequences of a stochastic approach to the conformal invariance of inflationary correlators

scholarly article

Consistency of matter coupling in modified gravity

scientific article published on 9 February 2023

Consistency relation forRpinflation ⬇️

scholarly article

Constant roll and non-Gaussian tail in light of logarithmic duality

scientific article published in February 2025

Constant-roll inflation: Confrontation with recent observational data ⬇️

Constraint on reheating afterf(R)inflation from gravitational waves ⬇️

scholarly article

Cosmic string passage through the Earth and consequent global earthquake

scholarly article by H. Motohashi & T. Suyama published 21 August 2013 in Astrophysics and Space Science

Cosmology based on f(R) gravity admits 1 eV sterile neutrinos

scientific article published on 19 March 2013

Differentiation identities for hypergeometric functions

scientific article published in December 2022

Disformal invariance of curvature perturbation ⬇️

Effective field theory of degenerate higher-order inflation

scientific article published on 23 April 2020

Evaporation of echoing black holes

scientific article published on 19 August 2022

Exact solution for wave scattering from black holes: Formulation

scientific article published on 29 July 2021

Fundamental theorem on gauge fixing at the action level ⬇️

article

Future oscillations around phantom divide inf(R) gravity

scholarly article by Hayato Motohashi et al published 6 June 2011 in Journal of Cosmology and Astroparticle Physics

General Relativity solutions in modified gravity

scholarly article by Hayato Motohashi & Masato Minamitsuji published June 2018 in Physics Letters B

General invertible transformation and physical degrees of freedom

scholarly article

Generalized slow roll in the unified effective field theory of inflation

scholarly article

Ghost-Free Theory with Third-Order Time Derivatives

Ghost-free theories with arbitrary higher-order time derivatives

scholarly article in Journal of High Energy Physics, 2018 no. 6, June 2018

Healthy degenerate theories with higher derivatives ⬇️

Inflation with a constant rate of roll ⬇️

article

Invertible disformal transformations with higher derivatives

scientific article published on 4 January 2022

Iterative extraction of overtones from black hole ringdown

scientific article published on 10 September 2024

Langevin description of gauged scalar fields in a thermal bath

scholarly article

Matter Power Spectrum in f(R) Gravity with Massive Neutrinos

scholarly article by H. Motohashi et al published 1 September 2010 in Progress of Theoretical and Experimental Physics

Nonlinear excitations in inflationary power spectra ⬇️

scholarly article

Phantom Boundary Crossing and Anomalous Growth Index of Fluctuations in Viable f(R) Models of Cosmic Acceleration

article

Physical effects of gravitational waves: pedagogical examples

scientific article published on 21 November 2022

Primordial black holes and induced gravitational waves from logarithmic non-Gaussianity

scientific article published in March 2025

Primordial black holes and local non-Gaussianity in canonical inflation

scholarly article

Quantum Ostrogradsky theorem

scientific article published in September 2020

Quasinormal modes of Schwarzschild black holes on the real axis

scientific article published on 7 February 2023

REHEATING AFTER f(R) INFLATION AND OBSERVATIONAL CONSTRAINTS

Reconciling tensor and scalar observables in G-inflation

Reheating afterf(R)inflation

scholarly article

Resonant Excitation of Quasinormal Modes of Black Holes

scientific article published on 9 April 2025

Running from features: Optimized evaluation of inflationary power spectra ⬇️

scholarly article

Self-accelerating massive gravity: Hidden constraints and characteristics ⬇️

scholarly article by Pavel Motloch et al published 13 May 2016 in Physical Review D

Self-accelerating massive gravity: Superluminality, Cauchy surfaces, and strong coupling ⬇️

scholarly article by Pavel Motloch et al published 17 August 2015 in Physical Review D

Self-accelerating solutions in massive gravity on an isotropic reference metric

scholarly article by Hayato Motohashi & Teruaki Suyama published 8 October 2012 in Physical Review D

Shape dependence of spontaneous scalarization

scientific article published on 19 February 2019

Spectroscopy of Kerr − AdS 5 spacetime with the Heun function: Quasinormal modes, greybody factor, and evaporation

scientific article published on 12 September 2022

Spin wave optics for gravitational waves lensed by a Kerr black hole

scientific article published on 5 December 2024

Stability of Schwarzschild-Like Spacetime in Parity Violating Gravitational Theories

Stability of cosmological solutions in extended quasidilaton massive gravity ⬇️

scholarly article by Hayato Motohashi & Wayne Hu published 7 November 2014 in Physical Review D

Stealth Schwarzschild solution in shift symmetry breaking theories

scholarly article

Third order equations of motion and the Ostrogradsky instability ⬇️

scholarly article

Ultra slow-roll inflation and the non-Gaussianity consistency relation

scholarly article

f(R) COSMOLOGY AND MASSIVE NEUTRINOS

scholarly article by HAYATO MOTOHASHI et al published January 2012 in International journal of modern physics conference series

List of works by Hayato Motohashi

ANALYTIC SOLUTION FOR MATTER DENSITY PERTURBATIONS IN A CLASS OF VIABLE COSMOLOGICAL f(R) MODELS

BLACK HOLE PERTURBATION IN MODIFIED GRAVITY THEORIES

Black hole perturbation in nondynamical and dynamical Chern-Simons gravity

Black hole perturbation in parity violating gravitational theories

Black hole perturbation in the most general scalar-tensor theory with second-order field equations. II. The even-parity sector ⬇️

Black hole perturbation in the most general scalar-tensor theory with second-order field equations: The odd-parity sector

Black hole perturbations in higher-order scalar–tensor theories: initial value problem and dynamical stability

Black hole ringdown from physically sensible initial value problem in higher-order scalar-tensor theories

Caustics for spherical waves ⬇️

Consequences of a stochastic approach to the conformal invariance of inflationary correlators

Consistency of matter coupling in modified gravity

Consistency relation forRpinflation ⬇️

Constant roll and non-Gaussian tail in light of logarithmic duality

Constant-roll inflation: Confrontation with recent observational data ⬇️

Constraint on reheating afterf(R)inflation from gravitational waves ⬇️

Cosmic string passage through the Earth and consequent global earthquake

Cosmology based on f(R) gravity admits 1 eV sterile neutrinos

Differentiation identities for hypergeometric functions

Disformal invariance of curvature perturbation ⬇️

Effective field theory of degenerate higher-order inflation

Evaporation of echoing black holes

Exact solution for wave scattering from black holes: Formulation

Fundamental theorem on gauge fixing at the action level ⬇️

Future oscillations around phantom divide inf(R) gravity

General Relativity solutions in modified gravity

General invertible transformation and physical degrees of freedom

Generalized slow roll in the unified effective field theory of inflation

Ghost-Free Theory with Third-Order Time Derivatives

Ghost-free theories with arbitrary higher-order time derivatives

Healthy degenerate theories with higher derivatives ⬇️

Inflation with a constant rate of roll ⬇️

Invertible disformal transformations with higher derivatives

Iterative extraction of overtones from black hole ringdown

Langevin description of gauged scalar fields in a thermal bath

Matter Power Spectrum in f(R) Gravity with Massive Neutrinos

Nonlinear excitations in inflationary power spectra ⬇️

Phantom Boundary Crossing and Anomalous Growth Index of Fluctuations in Viable f(R) Models of Cosmic Acceleration

Physical effects of gravitational waves: pedagogical examples

Primordial black holes and induced gravitational waves from logarithmic non-Gaussianity

Primordial black holes and local non-Gaussianity in canonical inflation

Quantum Ostrogradsky theorem

Quasinormal modes of Schwarzschild black holes on the real axis

REHEATING AFTER f(R) INFLATION AND OBSERVATIONAL CONSTRAINTS

Reconciling tensor and scalar observables in G-inflation

Reheating afterf(R)inflation

Resonant Excitation of Quasinormal Modes of Black Holes

Running from features: Optimized evaluation of inflationary power spectra ⬇️

Self-accelerating massive gravity: Hidden constraints and characteristics ⬇️

Self-accelerating massive gravity: Superluminality, Cauchy surfaces, and strong coupling ⬇️

Self-accelerating solutions in massive gravity on an isotropic reference metric

Shape dependence of spontaneous scalarization

Spectroscopy of Kerr − AdS 5 spacetime with the Heun function: Quasinormal modes, greybody factor, and evaporation

Spin wave optics for gravitational waves lensed by a Kerr black hole

Stability of Schwarzschild-Like Spacetime in Parity Violating Gravitational Theories

Stability of cosmological solutions in extended quasidilaton massive gravity ⬇️

Stealth Schwarzschild solution in shift symmetry breaking theories

Third order equations of motion and the Ostrogradsky instability ⬇️

Ultra slow-roll inflation and the non-Gaussianity consistency relation

f(R) COSMOLOGY AND MASSIVE NEUTRINOS

f(R) GRAVITY AND ITS COSMOLOGICAL IMPLICATIONS