# HEP/Astro Seminar -- Wednesday, 03 May 2000

##
Weakening Gravity with Compact Hyperboloids

### 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.