  We calculate to a few percent precision the Higgs potential in a model with
supersymmetry broken by boundary conditions on an extra-dimension, compactified
to a segment of length $L$, and a top quark quasi-localized on one of the two
boundaries. 1/L alone, in the range 2-4 TeV, determines the Higgs mass, in the
range 110-125 GeV, and the spectrum of gauginos, higgsinos and of the
third-generation squarks. Lower values of 1/L cannot be excluded, with a
progressive delocalization of the top quark.
