with the top quark. Its sole purpose is to generate a large mass for the top quark. In generating a top quark mass, this second sector also breaks the electroweak symmetry. If the characteristic scale of the topcolor sector is low, $f \ll F$, it plays only a minor role in electroweak breaking, but can still generate a sufficiently large top quark mass given a strong enough top-topcolor coupling. At low-energies, the top-color dynamics is summarized by the existence of a new dynamical top-Higgs which couples preferentially to the top-quark. The introduction of the top-Higgs field serves to alleviate the tension between obtaining the correct top quark mass and keeping $\Delta \rho$ small that exists in Higgsless models by separating the top quark mass generation from the rest of electroweak symmetry breaking. An important consequence of this separation is that the model permits heavy Dirac partners for the fermions that are potentially light enough to be seen at the LHC. Thus, the combination of two symmetry-breaking mechanisms can achieve both dynamical electroweak breaking and a realistic top quark mass.

Because electroweak symmetry is effectively broken twice in this scenario, there are two sets of Goldstone bosons in the theory. One 