U(1) Gauge Field of the Kaluza-Klein Theory in the Presence of Branes

Details U(1) Gauge Field of the Kaluza-Klein Theory in the Presence of Branes U(1) Gauge Field of the Kaluza-Klein Theory in the Presence of Branes

2000-07-25

arxiv.org/abs/hep-th/0007197v3

Phys.Rev. D63 (2001) 064036

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, revtex, no figure, version to appear in Phys. Rev. D, possible caveats of our results due to the zero mode ansatz we

Scientific paper

10.1103/PhysRevD.63.064036

We investigate the zero mode dimensional reduction of the Kaluza-Klein unifications in the presence of a single brane in the infinite extra dimension. We treat the brane as fixed, not a dynamical object, and do not require the orbifold symmetry. It seems that, contrary to the standard Kaluza-Klein models, the 4D effective action is no longer invariant under the U(1) gauge transformations due to the explicit breaking of isometries in the extra dimension by the brane. Surprisingly, however, the linearized perturbation analysis around the RS vacuum shows that the Kaluza-Klein gauge field does possess the U(1) gauge symmetry at the linear level. In addition, the graviscalar also behaves differently from the 4D point of view. Some physical implications of our results are also discussed.

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