Self-Tuning and de Sitter Brane Intersections in the 6-Dimensional Brane Models

Details Self-Tuning and de Sitter Brane Intersections in the 6-Dimensional Brane Models Self-Tuning and de Sitter Brane Intersections in the 6-Dimensional Brane Models

2001-09-10

arxiv.org/abs/hep-ph/0109073v1

Eur.Phys.J.C26:473-478,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 11 pages

Scientific paper

10.1140/epjc/s2002-01076-3

We study the self-tuning of general brane junctions and brane networks on the 6-dimensional space-time. For the general brane junctions, there may exist one fine-tuning among the brane tensions. For the brane networks, similar to the 5-dimensional self-tuning brane models, the brane tensions can be set arbitrarily and there exists the singularity for the metric and bulk scalar. And if we want to regularize the singularity, we will introduce the fine-tuning among the brane tensions. In addition, because the 4-dimensional cosmological constant we observe may be positive and very small, we discuss the brane network with de Sitter brane intersections by introducing a bulk scalar.

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