de Sitter Branes in a Flat Bulk of Massive Gravity
arXiv:1808.01506 · doi:10.1007/JHEP03(2019)132
Abstract
We construct de Sitter branes in a flat bulk of massive gravity in . We find two branches of solutions, reminiscent of the normal and self-accelerating branches in DGP, but with rather different properties. Neither branch has a self-accelerating limit: the background geometry requires having a nonvanishing tension. On the other hand, on both branches there are sub-branches where the leading order contributions of the tension to the curvature cancel. In these cases it turns out that larger tensions curve the background less. Further, both branches support a localized massless graviton for a special choice of bulk mass terms. This choice may be protected by enhanced gauge symmetry at least at the linearized level. Finally, we generalize the solutions to the case of bigravity in a flat bulk.
arXiv comment19 pages LaTeX, one .pdf figure; v2 expanded discussion on possible ghost-freedom of the construction, and other minor changes to agree with published version
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