Stability and superluminality of spherical DBI Galileon solutions

Goon, Garrett L; Hinterbichler, Kurt; Trodden, Mark

doi:10.1103/PHYSREVD.83.085015

Stability and superluminality of spherical DBI Galileon solutions

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.085015· OSTI ID:21541535

Goon, Garrett L; Hinterbichler, Kurt; Trodden, Mark ^[1]

Center for Particle Cosmology, Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)

The Dirac-Born-Infeld (DBI) Galileons are a generalization of the Galileon terms, which extend the internal Galilean symmetry to an internal relativistic symmetry, and can also be thought of as generalizations of DBI which yield second order field equations. We show that, when considered as local modifications to gravity, such as in the Solar System, there exists a region of parameter space in which spherically symmetric static solutions exist and are stable. However, these solutions always exhibit superluminality, casting doubt on the existence of a standard Lorentz invariant UV completion.

OSTI ID:: 21541535

Journal Information:: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 8 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821

Country of Publication:: United States

Language:: English

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Stability and superluminality of spherical DBI Galileon solutions

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