A Slant on Warped Extra Dimensions

Abstract

We propose an orbifolded, warped, extra dimension scenario in which the visible brane is not parallel to the hidden brane. This leads automatically to Lorentz violation in the visible, four dimensional world. The background solution to the Einstein equations is a function of a parameter that can be identified with the amount of 'tilting' of the brane. The cosmological constant is found to coincide with the classic Randall-Sundrum value to first order in this tilt. Lorentz violating effects induced in the Standard Model are considered. We find that the strongest constraint on the tilt comes from determinations of the electron-proton mass ratio in six quasar spectra (four optical and two radio). Measurements of a third radio source could improve this by an order of magnitude.

13 pages, no figures

References in corpus (19)

• A Large Mass Hierarchy from a Small Extra Dimension
• An Alternative to Compactification
• Lorentz-Violating Extension of the Standard Model
• Modulus Stabilization with Bulk Fields
• Data Tables for Lorentz and CPT Violation
• Gravity, Lorentz Violation, and the Standard Model
• Bulk Fields and Supersymmetry in a Slice of AdS
• Neutrino masses and mixings in non-factorizable geometry
• Fermion Masses, Mixings and Proton Decay in a Randall-Sundrum Model
• Flavor violation and warped geometry
• The anthropic principle and the mass scale of the Standard Model
• Gravitational Lorentz Violations and Adjustment of the Cosmological Constant in Asymmetrically Warped Spacetimes
• Strong Limit on a Variable Proton-to-Electron Mass Ratio from Molecules in the Distant Universe
• Stringent null constraint on cosmological evolution of the proton-to-electron mass ratio
• Anthropic considerations in multiple domain theories and the scale of electroweak symmetry breaking
• Keck telescope constraint on cosmological variation of the proton-to-electron mass ratio
• The density, the cosmic microwave background, and the proton-to-electron mass ratio in a cloud at redshift 0.9
• General considerations of the cosmological constant and the stabilization of moduli in the brane-world picture
• The Triple-Alpha Process and the Anthropically Allowed Values of the Weak Scale

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