HEP/Astro Seminar -- Wednesday, 03 May 2000

Weakening Gravity with Compact Hyperboloids

Mark Trodden, (Case Western)

Abstract

I will discuss theories with low gravitational (or string) scale M_* where Newton's constant is generated via new large-volume spatial dimensions, while Standard Model states are localized to a 3-brane. Utilizing compact hyperbolic manifolds I will show that the spectrum of Kaluza-Klein modes is radically altered. This allows an early universe cosmology with normal evolution up to substantial temperatures, and completely negates the constraints on M_* arising from astrophysics. Furthermore, an exponential hierarchy between the usual Planck scale and the true fundamental scale of physics can emerge with only order unity coefficients. The linear size of the internal space remains small. The proposal has striking testable signatures.

3:30pm, Smith Lab 4079

George T. Fleming (gfleming@mps.ohio-state.edu), last updated 25 April 2000.