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A Note on Ghost-Free Matter Couplings in Massive Gravity and Multi-Gravity
Published 23 Mar 2015 in hep-th and gr-qc | (1503.06796v2)
Abstract: We consider a recently proposed non-minimal matter coupling in massive gravity and multi-gravity. We argue that, when formulated in terms of unconstrained vielbeins, this matter coupling contains the primary constraints necessary to remove the Boulware-Deser ghost to all orders away from the decoupling limit.
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