Speaker
Dr
Kazufumi Takahashi
(Yukawa Institute for Theoretical Physics, Kyoto University)
Description
Invertible disformal transformations are a useful tool to investigate ghost-free scalar-tensor theories. By performing a higher-derivative generalization of the invertible disformal transformation on Horndeski theories, we construct a novel class of ghost-free scalar-tensor theories, which we dub generalized disformal Horndeski theories. In the talk, I will clarify the basic idea for constructing the invertible disformal transformation with higher derivatives. I will also discuss some aspects of the generalized disformal Horndeski theories, including the consistency of matter coupling and cosmological perturbations.
| arXiv reference, if applicable: | 2209.02176, 2304.08624 |
|---|---|
| Contact Email | [email protected] |
Primary author
Dr
Kazufumi Takahashi
(Yukawa Institute for Theoretical Physics, Kyoto University)
Co-authors
Dr
Masato Minamitsuji
(University of Lisbon)
Prof.
Hayato Motohashi
(Kogakuin University)
External references
- 24070088
- ad57158c-9a98-42e0-9167-c1b0db2163f1
