Flat Vacuum Branes Without Fine Tuning

Abstract

We construct solutions in purely gravitational bulk with flat vacuum branes without fine tuning the constants of the theory. Our solutions incorporate one or two branes and have topology S^1 x R^4 without Z_2 symmetry. They are not invariant under the four-dimensional Lorentz group effectively acting on the brane, but the significance of this fact will become clear only after the study of their perturbations.

9 pages, revtex. Text enlarged; version to appear in PLB

References in corpus (3)

• Gravitational Lorentz Violations and Adjustment of the Cosmological Constant in Asymmetrically Warped Spacetimes
• Einstein equations for an asymmetric brane-world
• Reflection symmetry breaking scenarios with minimal gauge form coupling in brane world cosmology

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