Braneworlds in six dimensions: new models with bulk scalars

Details Braneworlds in six dimensions: new models with bulk scalars Braneworlds in six dimensions: new models with bulk scalars

2006-11-07

arxiv.org/abs/hep-th/0611074v2

Class.Quant.Grav.24:79-94,2007

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, 1 figure, Replaced to match version published in Class. Quant. Grav

Scientific paper

10.1088/0264-9381/24/1/004

Six dimensional bulk spacetimes with 3-- and 4--branes are constructed using certain non--conventional bulk scalars as sources. In particular, we investigate the consequences of having the phantom (negative kinetic energy) and the Brans--Dicke scalar in the bulk while obtaining such solutions. We find geometries with 4--branes with a compact on--brane dimension (hybrid compactification) which may be assumed to be small in order to realize a 3--brane world. On the other hand, we also construct, with similar sources, bulk spacetimes where a 3--brane is located at a conical singularity. Furthermore, we investigate the issue of localization of matter fields (scalar, fermion, graviton, vector) on these 3-- and 4--branes and conclude with comments on our six dimensional models.

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