On consistent theories of massive spin-2 fields coupled to gravity

  title={On consistent theories of massive spin-2 fields coupled to gravity},
  author={Sayed Fawad Hassan and Angnis Schmidt-May and Mikael von Strauss},
  journal={Journal of High Energy Physics},
A bstractWe consider the issues that arise out of interpreting the ghost-free bimetric theory as a theory of a spin-2 field coupled to gravity. This requires identifying a gravitational metric and parameterizing deviations of the resulting theory from general relativity. To this end, we first consider the most general bimetric backgrounds for which a massless and a massive spin-2 fluctuation exist, and we compute the most general expression for the Fierz-Pauli mass. These backgrounds coincide… 

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