Extreme parameter sensitivity in quasidilaton massive gravity

  title={Extreme parameter sensitivity in quasidilaton massive gravity},
  author={Stefano Anselmi and Diana L. L'opez Nacir and Glenn D Starkman},
  journal={Physical Review D},
We reanalyze the behavior of Friedmann-Lema\^itre-Robertson-Walker cosmologies in the recently proposed quasidilaton massive-gravity model, and discover that the background dynamics present hitherto unreported features that require unexpected fine-tuning of the additional fundamental parameters of the theory for an observationally consistent background cosmology. We also identify new allowed regions in the parameters space and exclude some of the previously considered ones. The evolution of the… 

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