Cosmological viability of massive gravity with generalized matter coupling

@article{Solomon2014CosmologicalVO,
  title={Cosmological viability of massive gravity with generalized matter coupling},
  author={Adam R. Solomon and Jonas Enander and Yashar Akrami and Tomi S. Koivisto and Frank Konnig and Edvard Mortsell},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2014},
  volume={2015},
  pages={027 - 027}
}
There is a no-go theorem forbidding flat and closed FLRW solutions in massive gravity on a flat reference metric, while open solutions are unstable. Recently it was shown that this no-go theorem can be overcome if at least some matter couples to a hybrid metric composed of both the dynamical and the fixed reference metric. We show that this is not compatible with the standard description of cosmological sources in terms of effective perfect fluids, and the predictions of the theory become… 

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