Hiding An Extra Dimension

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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23 pages

Scientific paper

10.1088/1126-6708/2006/01/090

We propose a new geometry and/or topology of a single extra dimension whose Kaluza-Klein excitations do appear at much higher scale than the inverse of the length/volume. For a single extra dimenion with volume $N\pi\rho$ which is made of N intervals with size $\pi\rho$ attached at one point, Kaluza-Klein excitations can appear at $1/\rho$ rather than $1/N\rho$ which can hide the signal of the extra dimenion sufficiently for large N. The geometry considered here can be thought of a world volume theory of self intersecting branes or an effective description of complicated higher dimensional geometry such as Calabi-Yau with genus or multi-throat configurations. This opens a wide new domain of possible compactifications which deserves a serious investigation.

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