Codimension Two Compactifications and the Cosmological Constant Problem

Details Codimension Two Compactifications and the Cosmological Constant Problem Codimension Two Compactifications and the Cosmological Constant Problem

2003-02-17

arxiv.org/abs/hep-th/0302129v1

JCAP 0309 (2003) 004

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, rextex 4

Scientific paper

10.1088/1475-7516/2003/09/004

We consider solutions of six dimensional Einstein equations with two compact dimensions. It is shown that one can introduce 3-branes in this background in such a way that the effective four dimensional cosmological constant is completely independent of the brane tensions. These tensions are completely arbitrary, without requiring any fine tuning. We must, however, fine tune bulk parameters in order to obtain a sufficiently small value for the observable cosmological constant. We comment in the effective four dimensional description of this effect at energies below the compactification scale.

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