The decoupling limit of Multi-Gravity: Multi-Galileons, Dualities and More
High Energy Physics - Theory
2015-09-17 v1 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
In this paper we investigate the decoupling limit of a particular class of multi-gravity theories, i.e. of theories of interacting spin-2 fields. We explicitly compute the interactions of helicity-0 modes in this limit, showing that they take on the form of multi-Galileons and dual forms. In the process we extend the recently discovered Galileon dualities, deriving a set of new multi-Galileon dualities. These are also intrinsically connected to healthy, but higher-derivative, multi-scalar field theories akin to `beyond Horndeski' models.
Keywords
Cite
@article{arxiv.1503.02700,
title = {The decoupling limit of Multi-Gravity: Multi-Galileons, Dualities and More},
author = {Johannes Noller and James H. C. Scargill},
journal= {arXiv preprint arXiv:1503.02700},
year = {2015}
}
Comments
41 pages, 2 figures