2014
DOI: 10.1103/physrevd.89.084016
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Perturbations for massive gravity theories

Abstract: A theory of massive gravity depends on a nondynamical "reference metric" fµν which is often taken to be the flat Minkowski metric. In this paper we examine the theory of perturbations on a background with metricḡµν which does not coincide with the reference metric fµν . We derive the mass term for general perturbations on this background and show that it generically is not of the form of the Fierz-Pauli mass term. We explicitly compute it for some cosmological situations and show that it generically leads to i… Show more

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Cited by 22 publications
(27 citation statements)
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References 59 publications
(71 reference statements)
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“…[278]. Notice however that even though the mass term may not appear as having an exact Fierz-Pauli structure as shown in [278], it still has the correct structure to avoid any BD ghost, about any background [295, 294, 300, 297]. …”
Section: Massive Bi- and Multi-gravity Formulation: A Summarymentioning
confidence: 99%
“…[278]. Notice however that even though the mass term may not appear as having an exact Fierz-Pauli structure as shown in [278], it still has the correct structure to avoid any BD ghost, about any background [295, 294, 300, 297]. …”
Section: Massive Bi- and Multi-gravity Formulation: A Summarymentioning
confidence: 99%
“…Indeed, in principle one could, and actually one does [51,52], consider other choices for this "reference metric", which is usually denoted by f µν , 14 . But even if the phenomenology privileges one of these metrics, we would still be left with a "God-given" non-dynamical field.…”
Section: Conceptual Shortcomings Of the Drgt Approachmentioning
confidence: 99%
“…This computation was first carried out in [104,105] (see also [106][107][108]). The analysis is complicated by the presence of the square-root matrix g f 1 -whose perturbation around general 18 It should be noted that this first requirement can actually be avoided by demanding only that g c 2 h = mn mn is a solution.…”
Section: Linear Theory On Arbitrary Backgroundmentioning
confidence: 99%