DISCRETE SYMMETRIES, NATURAL FLAVOR CONSERVATION AND WEAK MIXING ANGLES

Through their physically relevant representations, I characterize the class of finite symmetry groups insuring natural conservation of all quark flavors in neutral current effects, in generalized Weinberg-Salam models. As pointed out by Gatto, Morchio and Strocchi, these situations lead to a natural determination of all the generalized Cabibbo angles. A necessary and sufficient condition for avoiding a trivial generalized Cabibbo matrix is also given. © 1979.