Avoidance of Naked Singularities in Dilatonic Brane World Scenarios with a Gauss-Bonnet Term
نویسندگان
چکیده
We consider, in 5 dimensions, the low energy effective action induced by heterotic string theory including the leading stringy correction of order α. 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 α, and become singular in this limit.
منابع مشابه
Improving the ‘self-tuning’ mechanism with a Gauss-Bonnet term
The effects of higher order gravity terms on a dilatonic brane world model are discussed [1]. For a single positive tension flat 3-brane, and one infinite extra dimension, we present a particular class of solutions with finite 4-dimensional Planck scale and no naked singularities. A ‘self-tuning’ mechanism for relaxing the cosmological constant on the brane, without a drastic fine tuning of par...
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