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arXiv · 1412.8471

Coupling between Galileon and massive gravity with composite metrics

Xian Gao·Daisuke Yoshida
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Abstract

We investigate the coupling between a Galileon scalar field and massive gravity through composite metrics. We derive the full set of equations of motion for a flat Friedmann-Robertson-Walker background, and study linear perturbations around it. Generally, the nonminimal coupling with the composite metric will excite all 6 degrees of freedom of the spatial metric perturbations, one of which may correspond to the Boulware-Deser ghost.

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Xian Gao, Daisuke Yoshida. 2014-12-29. Coupling between Galileon and massive gravity with composite metrics. https://doi.org/10.1103/physrevd.92.044057

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