Mukohyama, Shinji; Takahashi, Kazufumi; Tomikawa, Keitaro; Yingcharoenrat, Vicharit Quasinormal modes from EFT of black hole perturbations with timelike scalar profile. (English) Zbl 07729377 J. Cosmol. Astropart. Phys. 2023, No. 7, Paper No. 50, 29 p. (2023). MSC: 83C57 83D05 PDFBibTeX XMLCite \textit{S. Mukohyama} et al., J. Cosmol. Astropart. Phys. 2023, No. 7, Paper No. 50, 29 p. (2023; Zbl 07729377) Full Text: DOI arXiv
Takahashi, Kazufumi; Minamitsuji, Masato; Motohashi, Hayato Effective description of generalized disformal theories. (English) Zbl 1528.83165 J. Cosmol. Astropart. Phys. 2023, No. 7, Paper No. 9, 23 p. (2023). MSC: 83F05 35B20 83D05 81T32 81T12 PDFBibTeX XMLCite \textit{K. Takahashi} et al., J. Cosmol. Astropart. Phys. 2023, No. 7, Paper No. 9, 23 p. (2023; Zbl 1528.83165) Full Text: DOI arXiv
De Felice, Antonio; Mukohyama, Shinji; Takahashi, Kazufumi Approximately stealth black hole in higher-order scalar-tensor theories. (English) Zbl 1522.83159 J. Cosmol. Astropart. Phys. 2023, No. 3, Paper No. 50, 15 p. (2023). MSC: 83C57 80A10 83D05 81T32 85A15 PDFBibTeX XMLCite \textit{A. De Felice} et al., J. Cosmol. Astropart. Phys. 2023, No. 3, Paper No. 50, 15 p. (2023; Zbl 1522.83159) Full Text: DOI arXiv
Mukohyama, Shinji; Takahashi, Kazufumi; Yingcharoenrat, Vicharit Generalized Regge-Wheeler equation from effective field theory of black hole perturbations with a timelike scalar profile. (English) Zbl 1515.83166 J. Cosmol. Astropart. Phys. 2022, No. 10, Paper No. 50, 22 p. (2022). MSC: 83C57 83C35 83D05 81T12 81T32 35B20 PDFBibTeX XMLCite \textit{S. Mukohyama} et al., J. Cosmol. Astropart. Phys. 2022, No. 10, Paper No. 50, 22 p. (2022; Zbl 1515.83166) Full Text: DOI arXiv
Nakashi, Keisuke; Kimura, Masashi; Motohashi, Hayato; Takahashi, Kazufumi Black hole perturbations in higher-order scalar-tensor theories: initial value problem and dynamical stability. (English) Zbl 1501.83009 Classical Quantum Gravity 39, No. 17, Article ID 175003, 43 p. (2022). MSC: 83C57 35B20 58K25 58J47 81T32 81V60 51F15 35L05 28C20 35B05 PDFBibTeX XMLCite \textit{K. Nakashi} et al., Classical Quantum Gravity 39, No. 17, Article ID 175003, 43 p. (2022; Zbl 1501.83009) Full Text: DOI arXiv
Aoki, Katsuki; Gorji, Mohammad Ali; Mukohyama, Shinji; Takahashi, Kazufumi The effective field theory of vector-tensor theories. (English) Zbl 1486.83058 J. Cosmol. Astropart. Phys. 2022, No. 1, Paper No. 59, 44 p. (2022). MSC: 83C56 83F05 35B20 83D05 81R20 81T12 83E05 PDFBibTeX XMLCite \textit{K. Aoki} et al., J. Cosmol. Astropart. Phys. 2022, No. 1, Paper No. 59, 44 p. (2022; Zbl 1486.83058) Full Text: DOI arXiv
Takahashi, Kazufumi; Motohashi, Hayato Black hole perturbations in DHOST theories: master variables, gradient instability, and strong coupling. (English) Zbl 1492.83068 J. Cosmol. Astropart. Phys. 2021, No. 8, Paper No. 13, 36 p. (2021). MSC: 83C57 83D05 83F05 35B20 33C55 81T32 70S05 PDFBibTeX XMLCite \textit{K. Takahashi} and \textit{H. Motohashi}, J. Cosmol. Astropart. Phys. 2021, No. 8, Paper No. 13, 36 p. (2021; Zbl 1492.83068) Full Text: DOI arXiv
De Felice, Antonio; Mukohyama, Shinji; Takahashi, Kazufumi Nonlinear definition of the shadowy mode in higher-order scalar-tensor theories. (English) Zbl 1487.83028 J. Cosmol. Astropart. Phys. 2021, No. 12, Paper No. 20, 15 p. (2021). MSC: 83C40 83F05 35B20 81T32 83C50 78A45 PDFBibTeX XMLCite \textit{A. De Felice} et al., J. Cosmol. Astropart. Phys. 2021, No. 12, Paper No. 20, 15 p. (2021; Zbl 1487.83028) Full Text: DOI arXiv
Gong, Jinn-Ouk; Noumi, Toshifumi; Shiu, Gary; Soda, Jiro; Takahashi, Kazufumi; Yamaguchi, Masahide Effective field theory of anisotropic inflation and beyond. (English) Zbl 1492.83095 J. Cosmol. Astropart. Phys. 2020, No. 8, Paper No. 27, 26 p. (2020). MSC: 83E05 47A10 74E10 81T12 81R30 81V73 PDFBibTeX XMLCite \textit{J.-O. Gong} et al., J. Cosmol. Astropart. Phys. 2020, No. 8, Paper No. 27, 26 p. (2020; Zbl 1492.83095) Full Text: DOI arXiv
Iyonaga, Aya; Takahashi, Kazufumi; Kobayashi, Tsutomu Extended cuscuton as dark energy. (English) Zbl 1492.83040 J. Cosmol. Astropart. Phys. 2020, No. 7, Paper No. 4, 17 p. (2020). MSC: 83C56 83D05 58J47 PDFBibTeX XMLCite \textit{A. Iyonaga} et al., J. Cosmol. Astropart. Phys. 2020, No. 7, Paper No. 4, 17 p. (2020; Zbl 1492.83040) Full Text: DOI arXiv
Takahashi, Kazufumi; Motohashi, Hayato General relativity solutions with stealth scalar hair in quadratic higher-order scalar-tensor theories. (English) Zbl 1492.83067 J. Cosmol. Astropart. Phys. 2020, No. 6, Paper No. 34, 21 p. (2020). MSC: 83C57 83D05 81T32 81R20 70S05 83C40 83C20 70E05 PDFBibTeX XMLCite \textit{K. Takahashi} and \textit{H. Motohashi}, J. Cosmol. Astropart. Phys. 2020, No. 6, Paper No. 34, 21 p. (2020; Zbl 1492.83067) Full Text: DOI arXiv
Takahashi, Kazufumi; Kobayashi, Tsutomu Generalized 2D dilaton gravity and kinetic gravity braiding. (English) Zbl 1476.83107 Classical Quantum Gravity 36, No. 9, Article ID 095003, 8 p. (2019). MSC: 83C57 83E15 81T33 83D05 18M15 PDFBibTeX XMLCite \textit{K. Takahashi} and \textit{T. Kobayashi}, Classical Quantum Gravity 36, No. 9, Article ID 095003, 8 p. (2019; Zbl 1476.83107) Full Text: DOI arXiv
Iyonaga, Aya; Takahashi, Kazufumi; Kobayashi, Tsutomu Extended cuscuton: formulation. (English) Zbl 07462638 J. Cosmol. Astropart. Phys. 2018, No. 12, Paper No. 2, 24 p. (2018). MSC: 83-XX PDFBibTeX XMLCite \textit{A. Iyonaga} et al., J. Cosmol. Astropart. Phys. 2018, No. 12, Paper No. 2, 24 p. (2018; Zbl 07462638) Full Text: DOI arXiv
Takahashi, Kazufumi; Kobayashi, Tsutomu Extended mimetic gravity: Hamiltonian analysis and gradient instabilities. (English) Zbl 1515.83249 J. Cosmol. Astropart. Phys. 2017, No. 11, Paper No. 38, 21 p. (2017). MSC: 83D05 83F05 PDFBibTeX XMLCite \textit{K. Takahashi} and \textit{T. Kobayashi}, J. Cosmol. Astropart. Phys. 2017, No. 11, Paper No. 38, 21 p. (2017; Zbl 1515.83249) Full Text: DOI arXiv