Inflating Intersecting Branes and Remarks on the Hierarchy Problem

Details Inflating Intersecting Branes and Remarks on the Hierarchy Problem Inflating Intersecting Branes and Remarks on the Hierarchy Problem

1999-09-23

arxiv.org/abs/hep-ph/9909496v3

Phys.Lett. B472 (2000) 302-308

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, LaTeX. v2:Misprint in eq. (23) corrected; citations fixed and clarified relationship of our work to hep-th/9909053 a

Scientific paper

10.1016/S0370-2693(99)01471-9

We generalize solutions of Einstein's equations for intersecting branes in higher dimensional spacetimes to the nonstatic case, modeling an expanding universe. The relation between the Hubble rate, the brane tensions, and the bulk cosmological constant is similar to the case of a single 3-brane in a 5-dimensional spacetime. However, because the bulk inflates as well as the branes, this class of solutions suffers from Newton's constant tending toward zero on the TeV brane, where the Randall-Sundrum mechanism should solve the weak scale hierarchy problem. The strength of gravity remains constant on the Planck brane, however.

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