Coupling between Galileon and massive gravity with composite metrics
High Energy Physics - Theory
2015-09-04 v2 General Relativity and Quantum Cosmology
Abstract
We investigate the coupling between a Galileon scalar field and massive gravity through composite metrics. We derive the full set of equations of motion for a flat Friedmann-Robertson-Walker background, and study linear perturbations around it. Generally, the nonminimal coupling with the composite metric will excite all 6 degrees of freedom of the spatial metric perturbations, one of which may correspond to the Boulware-Deser ghost.
Cite
@article{arxiv.1412.8471,
title = {Coupling between Galileon and massive gravity with composite metrics},
author = {Xian Gao and Daisuke Yoshida},
journal= {arXiv preprint arXiv:1412.8471},
year = {2015}
}
Comments
23 pages, no figure; v2 matches the PRD version