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The coupling to matter in Massive, Bi- and Multi-Gravity

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arxiv 1408.5131 v2 pith:57WS56LH submitted 2014-08-21 hep-th astro-ph.COgr-qchep-ph

classification hep-thastro-ph.COgr-qchep-ph
keywords mattermassivemulti-gravityspin-2absenceactioncasesconstruct
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In this paper we construct a family of ways in which matter can couple to one or more `metrics'/spin-2 fields in the vielbein formulation. We do so subject to requiring the weak equivalence principle and the absence of ghosts from pure spin-2 interactions generated by the matter action. Results are presented for Massive, Bi- and Multi-Gravity theories and we give explicit expressions for the effective matter metric in all of these cases.

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  1. A new look at multi-gravity and dimensional deconstruction

    hep-th 2025-01 conditional novelty 7.0 of 10

    Keeping the lapse free in deconstruction yields scalar-tensor multi-gravity, which reproduces 5D Randall-Sundrum brane cosmology equations in the continuum limit.

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