Massive gravity coupled to DBI Galileons is ghost free
High Energy Physics - Theory
2013-08-19 v2 General Relativity and Quantum Cosmology
Abstract
It is possible to couple Dirac-Born-Infeld (DBI) scalars possessing generalized Galilean internal shift symmetries (Galileons) to nonlinear massive gravity in four dimensions, in such a manner that the interactions maintain the Galilean symmetry. Such a construction is of interest because it is not possible to couple such fields to massless General Relativity in the same way. We show that this theory has the primary constraint necessary to eliminate the Boulware-Deser ghost, thus preserving the attractive properties of both the Galileons and ghost-free massive gravity.
Keywords
Cite
@article{arxiv.1303.1177,
title = {Massive gravity coupled to DBI Galileons is ghost free},
author = {Melinda Andrews and Garrett Goon and Kurt Hinterbichler and James Stokes and Mark Trodden},
journal= {arXiv preprint arXiv:1303.1177},
year = {2013}
}
Comments
4 pages. v2 references added, argument changed to use unconstrained spatial dreibeins