  We study a five-dimensional pure SU(2) gauge theory formulated on the
orbifold and discretized on the lattice by means of Monte Carlo simulations.
The gauge symmetry is explicitly broken to U(1) at the orbifold boundaries. The
action is the Wilson plaquette action with a modified weight for the boundary
U(1) plaquettes. We study the phase transition and present results for the
spectrum and the shape of the static potential on the boundary. The latter is
sensitive to the presence of a massive Z-boson, in good agreement with the
directly measured Z-boson mass. The results may support an alternative view of
the lattice orbifold (stemming from its mean-field study) as a 5d bosonic
superconductor.
