Exotic new quarks and dynamical symmetry breaking

Abstract

Exotic quarks belonging to 6, 8, 10, or higher representations of $\mathrm{SU}{\mathrm{}\left(3\right)\mathrm{}}_c$ (quantum chromodynamics) naturally interact more strongly than conventional 3-plet quarks. Therefore, chiral-symmetry breaking in exotic quark sectors may occur at much larger mass scales than ordinary chiral-symmetry breaking. If those mass scales are about ${10}^3$ times larger, then when appended to the Weinberg-Salam model exotic quark-antiquark bound-state condensates could dynamically break the flavor SU(2) × U(1) gauge symmetry and produce viable $W^{\pm }$ and $Z^0$ masses which satisfy $M_W=M_Z{cos\theta }_W$. Features of this scenario are described.