Hybrid compactifications and brane gravity in six dimensions

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dc.creatorKobayashi, Tsutomu
dc.creatorTakamizu, Yu-ichi
dc.date2007-07-06
dc.date2007-11-28
dc.date.accessioned2026-07-07T11:52:44Z
dc.date.available2026-07-07T11:52:44Z
dc.descriptionWe consider a six-dimensional axisymmetric Einstein-Maxwell model of warped braneworlds. The bulk is bounded by two branes, one of which is a conical 3-brane and the other is a 4-brane wrapped around the axis of symmetry. The latter brane is assumed to be our universe. If the tension of the 3-brane is fine-tuned, it folds the internal two-dimensional space in a narrow cone, making sufficiently small the Kaluza-Klein circle of the 4-brane. An arbitrary energy-momentum tensor can be accommodated on this ring-like 4-brane. We study linear perturbations sourced by matter on the brane, and show that weak gravity is apparently described by a four-dimensional scalar-tensor theory. The extra scalar degree of freedom can be interpreted as the fluctuation of the internal space volume (or that of the circumference of the ring), the effect of which turns out to be suppressed at long distances. Consequently, four-dimensional Einstein gravity is reproduced on the brane. We point out that as in the Randall-Sundrum model, the brane bending mode is crucial for recovering the four-dimensional tensor structure in this setup.
dc.description15 pages, 2 figures; v2: references added; v3: accepted for publication in Class. Quant. Grav
dc.identifierhttps://arxiv.org/abs/0707.0894
dc.identifierhttp://arxiv.org/abs/0707.0894
dc.identifierClass.Quant.Grav.25:015007,2007
dc.identifierdoi:10.1088/0264-9381/25/1/015007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204289
dc.subjectHigh Energy Physics - Theory
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleHybrid compactifications and brane gravity in six dimensions
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