Ghost-free massive gravity with a general reference metric

  title={Ghost-free massive gravity with a general reference metric},
  author={Sayed Fawad Hassan and Rachel A. Rosen and A. Schmidt-May},
  journal={Journal of High Energy Physics},
A bstractTheories of massive gravity inevitably include an auxiliary reference metric. Generically, they also contain an inconsistency known as the Boulware-Deser ghost. Recently, a family of non-linear massive gravity actions, formulated with a flat reference metric, were proposed and shown to be ghost free at the complete non-linear level. In this paper we consider these non-linear massive gravity actions but now formulated with a general reference metric. We extend the proof of the absence… Expand
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