Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-06-14
JHEP 0108 (2001) 005
Physics
High Energy Physics
High Energy Physics - Theory
28 pages, 4 figures, JHEP LaTeX. Few typos corrected. Published version
Scientific paper
10.1088/1126-6708/2001/08/005
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.
Grojean Christophe
Quevedo Fernando
Tasinato Gianmassimo
Zavala Ivonne
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