Absorptive extra dimensions

Extra Dimensions

For explanation of terms used and discussion of significant model dependence of following limits, see the " Extra Dimensions Review. " Limits are expressed in conventions of of Giudice, Rattazzi, and Wells as explained in the Review. Footnotes describe originally quoted limit. n indicates the number of extra dimensions. Limits not encoded here are summarized in the " Extra Dimensions Review. " ...

Two Universal Extra Dimensions

We review the main results of the study of the Standard model propagating in two universal extra dimensions. Gauge bosons give rise to heavy spin-1 and spin-0 particles. The latter constitute the lightest Kaluza-Klein (KK) particle in the level (1,0). The level (1,1) can be s-channel produced. The main signals at the Tevatron and the LHC will be several tt̄ resonances.

Theories with Extra Dimensions

We review some aspects of theories with compact extra dimensions. We consider the motivation and the theoretical basis of Large, Universal and Warped Extra Dimensions. We focus on those aspects that are potentially relevant in the phenomenology at colliders. THE NEED FOR PHYSICS BEYOND THE STANDARD MODEL Although the Standard Model (SM) is in quite good agreement with experiment so far, there a...

Phenomenology of Extra Dimensions

Inflation from Extra Dimensions

A gravity-driven inflation is shown to arise from a simple higher dimensional universe. In vacuum, the shear of n > 1 contracting dimensions is able to inflate the remaining three spatial dimensions. Said another way, the expansion of the 3-volume is accelerated by the contraction of the n-volume. Upon dimensional reduction, the theory is equivalent to a four dimensional cosmology with a dynami...