Branes on charged dilatonic backgrounds: Selftuning, Lorentz violations and cosmology
Jun, 2001
26 pages
Published in:
- JHEP 08 (2001) 005
e-Print:
- hep-th/0106120 [hep-th]
Report number:
- DAMTP-2001-45,
- LBNL-48377
Citations per year
Abstract: (arXiv)
We construct an n+q+2 dimensional background that has dilatonic q-brane singularities and that is charged under an antisymmetric tensor field, the background spacetime being maximally symmetric in n-dimensions with constant curvature k=0,+1,-1. For k=1 the bulk solutions correspond to black q-branes. For k=0,-1 the geometry resembles the `white hole' region of the Reissner-N"ordstrom solution with a past Cauchy horizon. The metric between the (timelike) singularity and the horizon is static whereas beyond the horizon it is cosmological. In the particular case of q=0, we study the motion of a codimension one n-brane in these charged dilatonic backgrounds that interpolate between the original scalar self-tuning and the black hole geometry and provide a way to avoid the naked singularity problem and/or the need of having exotic matter on the brane. These backgrounds are asymmetrically warped and so break 4D Lorentz symmetry in a way that is safe for particle physics but may lead to faster than light propagation in the gravitational sector.Note:
- 28 pages, 4 figures, JHEP LaTeX. Few typos corrected. Published version
- membrane model
- background: charge
- dilaton
- space-time
- violation: Lorentz
- dimension: 5
- gravitational radiation
- numerical calculations
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