Nonsingular global string compactifications

Details Nonsingular global string compactifications Nonsingular global string compactifications

1999-11-03

arxiv.org/abs/hep-th/9911015v2

Phys.Rev.Lett. 84 (2000) 2564-2567

Physics

High Energy Physics

High Energy Physics - Theory

8 pages revtex, 1 figure : References added and equation corrected

Scientific paper

10.1103/PhysRevLett.84.2564

We consider an exotic `compactification' of spacetime in which there are two infinite extra dimensions, using a global string instead of a domain wall. By having a negative cosmological constant we prove the existence of a nonsingular static solution using a dynamical systems argument. A nonsingular solution also exists in the absence of a cosmological constant with a time-dependent metric. We compare and contrast this solution with the Randall-Sundrum universe and the Cohen-Kaplan spacetime, and consider the options of using such a model as a realistic resolution of the hierarchy problem.

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