Canonical Estimation of Weak Radiative Corrections in Unified Gauge Theories and Selection Rules

The Bjorken-Johnson-Low limit is used in a canonical current-algebra framework to estimate the magnitude of weak radiative corrections in second and fourth order of the weak coupling constants for unified gauge theories with strong interactions accounted nonperturbatively. We study, in particular, the question of violation of selection rules such as those for parity and strangeness ($\left|\Delta S\right|=1\mathrm{}$ to second order and $\left|\Delta S\right|=2\mathrm{}$ to fourth order) for a large class of models, in which strong interactions are generated by Abelian gauges (the neutral-vector-gluon theory) or a special set of non-Abelian gauges.