Behavior of perturbations on spherically symmetric backgrounds in multi-Galileon theory

Abstract

We consider multi-Galileon theory, the most general Galilean invariant theory with $N$ scalar fields linearly coupled to the trace of the stress-energy tensor. We study the behavior of perturbations on a static spherically symmetric background with a massive point source, and show that, under the assumptions of stability and successful Vainshtein screening, solutions cannot be found that are free of both superluminal propagation and slowly moving, strongly coupled fluctuations. The latter imply that the theoretical and phenomenological issues related to a very low strong-interaction scale cannot be avoided in this model.

24 pages. Minor corrections

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Cited by in corpus (13)

• Beyond the Cosmological Standard Model
• Massive Gravity
• Interacting Spin-2 Fields
• Nonlinear structure formation in the Cubic Galileon gravity model
• Deconstructing Dimensions and Massive Gravity
• Superluminality, Black Holes and Effective Field Theory
• New terms for scalar multi-Galileon models and application to SO(N) and SU(N) group representations
• Growth of Matter Perturbations in the Bi-Galileons Field Model
• Can Galileons support Lorentzian wormholes?
• Classifying Galileon $p$-form theories
• Gauged Galileons
• Superluminality in dilatationally invariant generalized Galileon theories
• Galileon Radiation from a Spherical Collapsing Shell