Cascading Gravity is Ghost Free
High Energy Physics - Theory
2014-11-20 v3 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We perform a full perturbative stability analysis of the 6D cascading gravity model in the presence of 3-brane tension. We demonstrate that for sufficiently large tension on the (flat) 3-brane, there are no ghosts at the perturbative level, consistent with results that had previously only been obtained in a specific 5D decoupling limit. These results establish the cascading gravity framework as a consistent infrared modification of gravity.
Keywords
Cite
@article{arxiv.1002.1075,
title = {Cascading Gravity is Ghost Free},
author = {Claudia de Rham and Justin Khoury and Andrew J. Tolley},
journal= {arXiv preprint arXiv:1002.1075},
year = {2014}
}
Comments
24 pages, minor changes, argument on vector perturbations improved