DBI and the Galileon reunited

Journal Article · Sat May 01 04:00:00 EDT 2010 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2010/05/015· OSTI ID:22272878

Rham, Claudia de ^[1]

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1. Départment de Physique Théorique, Université de Genève, 24 Quai E. Ansermet, CH-1211, Genève (Switzerland)

We derive the relativistic generalization of the Galileon, by studying the brane position modulus of a relativistic probe brane embedded in a five-dimensional bulk. In the appropriate Galilean contraction limit, we recover the complete Galileon generalization of the DGP decoupling theory and its conformal extension. All higher order interactions for the Galileon and its relativistic generalization naturally follow from the brane tension, induced curvature, and the Gibbons-Hawking-York boundary terms associated with all bulk Lovelock invariants. Our approach makes the coupling to gravity straightforward, in particular allowing a simple rederivation of the nonminimal couplings required by the Covariant Galileon. The connection with the Lovelock invariants makes the well-defined Cauchy problem manifest, and gives a natural unification of four dimensional effective field theories of the DBI type and the Galileon type.

• OSTI ID: 22272878
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 05 Vol. 2010; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASTROPHYSICS
BORN-INFELD THEORY
BRANES
CAUCHY PROBLEM
COSMOLOGY
DECOUPLING
FIELD THEORIES
FOUR-DIMENSIONAL CALCULATIONS
GRAVITATION
RELATIVISTIC RANGE