Color sextet quarks and new high-energy interactions

摘要

We review the implications of adding a flavor doublet of color sextet quarks to QCD. Theoretical attractions include -- ''minimal'' dynamical symmetry breaking of the electroweak interaction, solution of the Strong CP problem via the ''heavy axion'' (eta)(sub 6), and Critical Pomeron Scaling at asymptotic energies. Related experimental phenomena, which there may be evidence for, include -- production of the (eta)(sub 6) at LEP, large cross-sections for W(sup +)W(sup (minus)) and Z(sup o)Z(sup o) pairs and very high energy jets in hadron colliders, and a hadronic threshold above which high-energy ''exotic'' diffractive processes appear in Cosmic Ray events.