Abstract
An analogy between a triplet of quarks and a triplet of leptons is discussed in the framework of a model of weak and electromagnetic interactions possessing local SU(2) L × U(1) symmetry. After the symmetry is broken spontaneously by use of the Higgs-Kibble mechanism, two of the quark masses are non-zero. The relation of the quark masses to the chiral SU(3) × SU(3) model of strong interactions as well as the Cabibbo angle is discussed.
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