Colour and hypercharge - are they structural symmetries

By starting from a left-handed non-Hermitian isodoublet Weyl field chi without hypercharge and colour degrees of freedom, the possibility is investigated if the effective leptons and quarks, arising in the composite chi chi chi and chi chisup(*) chisup(*) level, allow the introduction of additional ''structural'' symmetries. Those structural degrees of freedom are introduced as symmetric consequences (not Higgs-like) of the spontaneous breakdown of the basic U1 x SUsub(2,loc) group and are carried by dressing operators associated with the broken degrees of freedom. (author)