  In this work, we analyze a class of Yang-Mills models containing adjoint
Higgs fields, with SU(N) symmetry spontaneously broken down to Z(N), showing
they contain center vortices, Y-junctions formed by them, and junctions where
different center vortices are smoothly interpolated by monopole-like
configurations.
  In the context of dual superconductors, these objects represent different
states of the gluon field. Center vortices confine quarks to form normal hadron
states. The interpolating monopole, which in our model cannot exist as an
isolated configuration, is identified with a confined valence gluon. A junction
containing a monopole can bind quarks in a color nonsinglet state to form an
overall neutral object, identified with a hybrid hadron. These states, formed
by quarks bound to a valence gluon, are allowed by QCD, and current
experimental collaborations are aimed at identifying them. Finally, considering
the general version of the model, based on a compact simple gauge group G, the
picture is completed with a heuristic discussion about why it would be natural
using as G the dual of the chromoelectric gauge group G_e, and external
pointlike monopoles to represent the mesonic and baryonic Wilson loops.
