Positive tension 3-branes in an $AdS_{5}$ bulk

Details Positive tension 3-branes in an $AdS_{5}$ bulk Positive tension 3-branes in an $AdS_{5}$ bulk

2010-01-07

arxiv.org/abs/1001.1075v2

JHEP 1009:051,2010

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, new version to appear in JHEP

Scientific paper

10.1007/JHEP09(2010)051

In this work, we review and extend the so-called consistency conditions for the existence of a braneworld scenario in arbitrary dimensions in the Brans-Dicke (BD) gravitational theory. After that, we consider the particular case of a five-dimensional scenario which seems to have phenomenological interesting implications. We show that, in the BD framework, it is possible to achieve necessary conditions pointing to the possibility of accommodating branes with positive tensions in an AdS bulk by the presence of the additional BD scalar field, avoiding in this way the necessity of including unstable objects in the compactification scheme. Furthermore, in the context of time variable brane tension, it is shown that the brane tension may change its sign, following the bulk cosmological constant sign.

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