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The decoupling limit of Multi-Gravity: Multi-Galileons, Dualities and More

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arxiv 1503.02700 v1 pith:3ILBPNFV submitted 2015-03-09 hep-th astro-ph.COgr-qc

Johannes Noller , James H.C. Scargill This is my paper · ORCID
classification hep-thastro-ph.COgr-qc
keywords dualitieslimittheoriesdecouplingmulti-galileonsmulti-gravityakinbeyond
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In this paper we investigate the decoupling limit of a particular class of multi-gravity theories, i.e. of theories of interacting spin-2 fields. We explicitly compute the interactions of helicity-0 modes in this limit, showing that they take on the form of multi-Galileons and dual forms. In the process we extend the recently discovered Galileon dualities, deriving a set of new multi-Galileon dualities. These are also intrinsically connected to healthy, but higher-derivative, multi-scalar field theories akin to `beyond Horndeski' models.

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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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