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Self-tuning and de Sitter brane intersections in 6-dimensional brane models

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Abstract.

We study the self-tuning of general brane junctions and brane networks on 6-dimensional space-time. For 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 a singularity for the metric and bulk scalar. If we want to regularize the singularity, we will introduce 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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Received: 8 November 2001 / Published online: 20 November 2002

RID="a"

ID="a" Present address: Division of High Energy Physics, Argonne National Laboratory, Argonne IL 60439, USA

RID="b"

ID="b" Present address: School of Natural Sciences, Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540, USA. E-mail: tli@sns.ias.edu

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Jiang, J., Li, T. Self-tuning and de Sitter brane intersections in 6-dimensional brane models. Eur. Phys. J. C 26, 473–478 (2003). https://doi.org/10.1140/epjc/s2002-01076-3

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  • DOI: https://doi.org/10.1140/epjc/s2002-01076-3

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