Disformally self-tuning gravity
High Energy Physics - Theory
2016-05-04 v3 General Relativity and Quantum Cosmology
Abstract
We extend a previous self-tuning analysis of the most general scalar-tensor theory of gravity in four dimensions with second order field equations by considering a generalized coupling to the matter sector. Through allowing a disformal coupling to matter we are able to extend the Fab Four model and construct a new class of theories that are able to tune away the cosmological constant on Friedmann-Lemaitre-Robertson-Walker backgrounds.
Cite
@article{arxiv.1511.02055,
title = {Disformally self-tuning gravity},
author = {William T. Emond and Paul M. Saffin},
journal= {arXiv preprint arXiv:1511.02055},
year = {2016}
}
Comments
36 pages. Prepared for publication in JHEP. Additional section included detailing analysis of a specific example in the case of the most general disformal self-tuning coupling to the matter sector. Minor edits made to main body of text