Effective description of generalized disformal theories
General Relativity and Quantum Cosmology
2023-07-06 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
Generalized disformal transformations enable us to construct the generalized disformal Horndeski theories, which form the most general class of ghost-free scalar-tensor theories to this date. We extend the effective field theory (EFT) of cosmological perturbations to incorporate these generalized disformal Horndeski theories. The main difference from the conventional EFT is that our extended EFT involves operators with higher spatial derivatives of the lapse function. Our EFT also accommodates the generalized disformal transformation of U-DHOST theories.
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Cite
@article{arxiv.2304.08624,
title = {Effective description of generalized disformal theories},
author = {Kazufumi Takahashi and Masato Minamitsuji and Hayato Motohashi},
journal= {arXiv preprint arXiv:2304.08624},
year = {2023}
}
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16 pages