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Jim Cline McGill The possibility of compact extra dimensions of submillimeter size has received wide attention in the last year, as a possible solution to the hierarchy problem and a rich source of new physics. I will discuss some of the cosmological challenges of such models, like how to stabilize the radius of the extra dimensions and have baryogenesis. The main focus will be on achieving successful inflation. I conclude that inflation seems to require the new gravity scale to be near the GUT scale, rather than the hoped-for TeV scale that would solve the hierarchy problem.
Tuesday, April 13th 1999, 13:00 |