  The process e+e- --> mu+ mu- + missing E_T, where the missing energy is due
to the production of a tower of invisible graviton states in a model with large
extra dimensions, is considered. We focus on the scenario when this process is
used to detect a heavy dileptonic resonance in the electroweak sector of the
model, taking as example some models with an extra Z' boson. It turns out that
at a 500 GeV machine with 1000 inverse fb of luminosity, it may be possible to
use this process to such detect resonances if there are two large extra
dimensions and the string scale is not too far above a TeV.

High Energy Physics - Phenomenology