# Cutoff for extensions of massive gravity and bi-gravity

@article{Matas2016CutoffFE, title={Cutoff for extensions of massive gravity and bi-gravity}, author={Andrew Matas}, journal={Classical and Quantum Gravity}, year={2016}, volume={33} }

Recently there has been interest in extending ghost-free massive gravity, bi-gravity, and multi-gravity by including non-standard kinetic terms and matter couplings. We first review recent proposals for this class of extensions, emphasizing how modifications of the kinetic and potential structure of the graviton and modifications of the coupling to matter are related. We then generalize existing no-go arguments in the metric language to the vielbein language in second-order form. We give an ADM…

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