Topcolor is a model in theoretical physics, of dynamical electroweak symmetry breaking in which the top quark and anti-top quark form a composite Higgs boson by a new force arising from massive "top gluons".
[1][2] The solution to composite Higgs models was actually anticipated in 1981, and found to be the Infrared fixed point for the top quark mass.
The topcolor model anticipates the idea of dimensional deconstruction and extra space dimensions, as well as the large mass of the top quark.
In 2019 this was revisited ("scalar democracy")[5] in which many composite Higgs bosons may form at very high energies, composed of the known quarks and leptons, perhaps bound by universal force (e.g., gravity, or an extension of topcolor).
The theory predicts many new Higgs doublets, starting at the TeV mass scale, with