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arXiv · 1802.08107

Geometry of Multi-Flavor Galileon-Like Theories

Mark P. Bogers·Tomas Brauner
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Abstract

We use Lie-algebraic arguments to classify Lorentz-invariant theories of massless interacting scalars that feature coordinate-dependent redundant symmetries of the Galileon type. We show that such theories are determined, up to a set of low-energy effective couplings, by specifying an affine representation of the Lie algebra of physical, non-redundant internal symmetries and an invariant metric on its target space. This creates an infinite catalog of theories relevant for both cosmology and high-energy physics thanks to their special properties such as enhanced scaling of scattering amplitudes in the soft limit.

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Mark P. Bogers, Tomas Brauner. 2018-10-04. Geometry of Multi-Flavor Galileon-Like Theories. https://doi.org/10.1103/physrevlett.121.171602

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