Avoidance of Naked Singularities in Dilatonic Brane World Scenarios with a Gauss-Bonnet Term

Details Avoidance of Naked Singularities in Dilatonic Brane World Scenarios with a Gauss-Bonnet Term Avoidance of Naked Singularities in Dilatonic Brane World Scenarios with a Gauss-Bonnet Term

2002-06-11

arxiv.org/abs/hep-th/0206089v2

Phys.Lett.B544:183-191,2002

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, 1 figure, discussion of self-tuning changed

Scientific paper

10.1016/S0370-2693(02)02477-2

We consider, in 5 dimensions, the low energy effective action induced by heterotic string theory including the leading stringy correction of order alpha'. In the presence of a single positive tension flat brane, and an infinite extra dimension, we present a particular class of solutions with finite 4-dimensional Planck scale and no naked singularity. A ``self-tuning'' mechanism for relaxing the cosmological constant on the brane, without a drastic fine tuning of parameters, is discussed in this context. Our solutions are distinct from the standard self-tuning solutions discussed in the context of vanishing quantum corrections in alpha', and become singular in this limit.

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