An attractive hypothesis for the quantum numbers of technifermions is that they consist of a $Y=0\mathrm{}$ weak doublet together with $Y=\pm 1$ weak singlets of opposite chirality to the doublet. Usually these particles are postulated in an ad hoc manner, and so there is no understanding of why technifermions do not follow the pattern of ordinary fermion representations. We show how such technifermions can arise naturally in an extension of the standard model.

• Received 23 January 1990

DOI:https://doi.org/10.1103/PhysRevD.42.1851