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Journal Articles Physics Letters B Year : 2002

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

Abstract

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.

Dates and versions

in2p3-00084715 , version 1 (10-07-2006)

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P. Binetruy, C. Charmousis, S.C. Davis, J.-F. Dufaux. Avoidance of Naked Singularities in Dilatonic Brane World Scenarios with a Gauss-Bonnet Term. Physics Letters B, 2002, 544, pp.183-191. ⟨10.1016/S0370-2693(02)02477-2⟩. ⟨in2p3-00084715⟩
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