The Interval Approach to Braneworld Gravity
arXiv:hep-ph/0506305 · doi:10.1103/PhysRevD.72.084017
Abstract
Gravity in five-dimensional braneworld backgrounds may exhibit extra scalar degrees of freedom with problematic features, including kinetic ghosts and strong coupling behavior. Analysis of such effects is hampered by the standard heuristic approaches to braneworld gravity, which use the equations of motion as the starting point, supplemented by orbifold projections and junction conditions. Here we develop the interval approach to braneworld gravity, which begins with an action principle. This shows how to implement general covariance, despite allowing metric fluctuations that do not vanish on the boundaries. We reproduce simple Z_2 orbifolds of gravity, even though in this approach we never perform a Z_2 projection. We introduce a family of ``straight gauges'', which are bulk coordinate systems in which both branes appear as straight slices in a single coordinate patch. Straight gauges are extremely useful for analyzing metric fluctations in braneworld models. By explicit gauge fixing, we show that a general AdS_5/AdS_4 setup with two branes has at most a radion, but no physical ``brane-bending'' modes.
45 pages
References in corpus (37)
- A Large Mass Hierarchy from a Small Extra Dimension
- An Alternative to Compactification
- The Hierarchy Problem and New Dimensions at a Millimeter
- New Dimensions at a Millimeter to a Fermi and Superstrings at a TeV
- 4D Gravity on a Brane in 5D Minkowski Space
- The Einstein Equations on the 3-Brane World
- Bounds on Universal Extra Dimensions
- Ghost Condensation and a Consistent Infrared Modification of Gravity
- On Kaluza-Klein States from Large Extra Dimensions
- Locally Localized Gravity
- Strong Interactions and Stability in the DGP Model
- Metastable Gravitons and Infinite Volume Extra Dimensions
- Opening up extra dimensions at ultra-large scales
- Dynamic Dilatonic Domain Walls
- Brane World Cosmology - Gauge-Invariant Formalism for Perturbation
- Wave function of the radion in a brane world
- The Shape of Gravity
- Fermions on an Interval: Quark and Lepton Masses without a Higgs
- Opaque Branes in Warped Backgrounds
- Localized Gravity in String Theory
- Brane-localized Kinetic Terms in the Randall-Sundrum Model
- Chiral Compactification on a Square
- Brane-induced gravity in more than one extra dimensions: violation of equivalence principle and ghost
- The Fate of the Radion in Models with Metastable Graviton
- A Comment on Brane Bending and Ghosts in Theories with Infinite Extra Dimensions
- Strong coupling in brane-induced gravity in five dimensions
- Ghost-free braneworld bigravity
- On brane-induced gravity in warped backgrounds
- Effective Lagrangians for physical degrees of freedom in the Randall-Sundrum model
- Asymmetrical large extra dimensions
- Massive Gravity on a Brane
- Boundary Terms in Brane Worlds
- Supersymmetry from Boundary Conditions
- Which action for brane worlds?
- Brane-World Multigravity
- The radion and the perturbative metric in RS1
- The Radion in the Karch-Randall Braneworld
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- A rapid holographic phase transition with brane-localized curvature
- Supersymmetry in 5d Gravity
- Gauge-Fixing and Residual Symmetries in Gauge/Gravity Theories with Extra Dimensions
- Self-accelerating Warped Braneworlds
- Revamped Braneworld Gravity
- Supersymmetry and Electroweak Breaking in the Interval
- Gravity on a Little Warped Space
- Regarding the Radion in Randall-Sundrum Models with Brane Curvature
- Neutrino Mass and from a Mini-Seesaw
- Beyond brane-Higgs regularisation: clarifying the method and model
- Large Star/Rose Extra Dimension with Small Leaves/Petals
- A four-dimensional description of five-dimensional N-brane models
- Revisiting Quantum Stabilization of the Radion in Randall-Sundrum Model
- SUSY QM Meets 5d Gravity
- Gravitational Interactions in a General Multibrane Model
- Structure of Massive Gauge/Gravity Scattering Amplitudes, Equivalence Theorems, and Extended Double-Copy with Compactified Warped Space
- Scattering amplitudes in the Randall-Sundrum model with brane-localized curvature terms