Brane world solution to the cosmological constant problem.
We consider a model with two parallel (positive tension) 3-branes separated by a distance L in five-dimensional spacetime. If the interbrane space is anti--de Sitter, or is not precisely anti--de Sitter but contains no event horizons, the effective four-dimensional cosmological constant seen by observers on one of the branes (chosen to be the visible brane) becomes exponentially small as L grows large.
Tye
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Laboratory for Nuclear Studies, Cornell University, Ithaca, New York 14853, USA. tye@mail.lns.cornell.edu
Wasserman
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