The introduction of extra space dimensions in the theory could be an elegant
way tovsolve the hierarchy problem. There could even be one energy scale at
which all interactions could unify. The limits coming from our knowledge of the
gravitation at low distance allow this energy scale to be as low as few TeV.
This situation is extremely interesting experimentally in the context of the
LHC which will cover the range from 100 GeV to few TeV. This article describes
the different analyses developed by the LHC experiments to study this new
phenomenology.Comment: 7 pages, 6 figure