Invertible disformal transformations with arbitrary higher-order derivatives
General Relativity and Quantum Cosmology
2023-10-19 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
Invertible disformal transformations serve as a useful tool to explore ghost-free scalar-tensor theories. In this paper, we construct a generalization of invertible disformal transformations that involves arbitrary higher-order covariant derivatives of the scalar field. As a result, we obtain a more general class of ghost-free scalar-tensor theories than ever. Notably, our generalization is such that matter fields can be consistently coupled to these theories without introducing an unwanted extra degree of freedom in the unitary gauge.
Cite
@article{arxiv.2307.08814,
title = {Invertible disformal transformations with arbitrary higher-order derivatives},
author = {Kazufumi Takahashi},
journal= {arXiv preprint arXiv:2307.08814},
year = {2023}
}
Comments
9 pages