Smoothing out Negative Tension Brane
arXiv:0811.3459 · doi:10.1016/j.physletb.2009.04.048
Abstract
We propose an extension of the five dimensional gravitational action with an external source in order to allow arbitrary smoothing of the negative tension brane in the Randall-Sundrum model. This extended action can be derived from a model with an auxiliary four form field coupled to the gravity. We point out a further generalization of our model in relation to tachyon condensation. A possible mechanism for radion stabilization in our model is also discussed.
12 pages, 4 figures (v1); References added (v2); Footnote 7 and a reference added, version to appear in Physics Letters B (v3)