Brane Effects on Extra Dimensional Scenarios: A Tale of Two Gravitons

Abstract

We analyze the propagation of a scalar field in multidimensional theories which include kinetic corrections in the brane, as a prototype for gravitational interactions in a four dimensional brane located in a (nearly) flat extra dimensional bulk. We regularize the theory by introducing an infrared cutoff given by the size of the extra dimensions and a physical ultraviolet cutoff of the order of the fundamental Planck scale in the higher dimensional theory. We show that, contrary to recent suggestions, the radius of the extra dimensions cannot be arbitrarily large. Moreover, for finite radii, the gravitational effects localized on the brane can substantially alter the phenomenology of collider and/or table-top gravitational experiments. This phenomenology is dictated by the presence of a massless graviton, with standard couplings to the matter fields, and a massive graviton which couples to matter in a much stronger way. While graviton KK modes lighter than the massive graviton couple to matter in a standard way, the couplings to matter of the heavier KK modes are strongly suppressed.

21 pages, latex2e, axodraw.sty, 2 figures

Cited by in corpus (27)

• Accelerated Universe from Gravity Leaking to Extra Dimensions
• Diluting Cosmological Constant In Infinite Volume Extra Dimensions
• Scales of Gravity
• Opaque Branes in Warped Backgrounds
• Brane-localized Kinetic Terms in the Randall-Sundrum Model
• Softly Massive Gravity
• Induced brane gravity: realizations and limitations
• Induced Gravity on RS Branes
• D-branes in Standard Model building, Gravity and Cosmology
• The Throat as a Randall-Sundrum Model with Goldberger-Wise Stabilization
• Graviton Mass or Cosmological Constant?
• Brane Localized Curvature for Warped Gravitons
• See-Saw Modification of Gravity
• A rapid holographic phase transition with brane-localized curvature
• ICTP Lectures on Large Extra Dimensions
• k-stabilization in brane models
• Revamped Braneworld Gravity
• Blown-up p-Branes and the Cosmological Constant
• Weakly-coupled metastable graviton
• The Schwarzschild solution in the DGP model
• Gravity induced over a smooth soliton
• Correspondence principle for a brane in Minkowski space and vector mesons
• Gravitational waves in braneworlds after multi-messenger events
• Constrained Perturbative Expansion of the DGP Model
• Higher order dilaton gravity: brane equations of motion in the covariant formulation
• A brane in five-dimensional Minkowski space
• Gravity on de-Sitter 3-Brane, Induced Einstein-Hilbert Term and Massless Gravitons