Models with Extra Dimensions and Their Phenomenology

Abstract

The Arkani-Hamed-Dimopoulos-Dvali and the Randall-Sundrum models with extra spacelike dimensions, recently proposed as a solution to the hierarchy problem, are reviewed. We discuss their basic properties and phenomenological effects of particle interactions at high energies, predicted whithin these models.

Comments: 52 pages, 15 postscript figures, LaTeX, based on the lectures given at the XI School "Particles and Cosmology" (Baksan, April 18-24, 2001); new references are added in the revised version