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Covariant multi-galileons and their generalisation
classification
🌀 gr-qc
astro-ph.COhep-th
keywords
covarianttheoryarriveclasscompletionconjecturedescribingenlarged
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We find a covariant completion of the flat-space multi-galileon theory, preserving second-order field equations. We then generalise this to arrive at an enlarged class of second order theories describing multiple scalars and a single tensor, and conjecture that these are a multi-scalar version of Horndeski's most general scalar-tensor theory.
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