Summary
We propose and exploit a procedure which leads to the construction of the symmetries (K-symmetries) responsible for « natural » flavour conservation in Higgs-induced neutral processes in extended Weinberg-Salam models. We display a large class of examples of continuous and discreteK-symmetries concerning any number of fermion generations. A sufficient condition in order to avoid degenerate fermion masses is also proved.
Riassunto
È proposto e sfruttato un procedimento che conduce alla costruzione delle simmetrie (simmetrieK) responsabili, nell’ambito di modelli estesi di Weinberg-Salam, della conservazione naturale del « sapore » dei fermioni in processi neutri indotti da mesoni di Higgs. Si fornisce un’ampia gamma di esempi di simmetrieK, sia continue che discrete, concernenti un numero qualsiasi di generazioni di fermioni. Si dimostra anche una condizione sufficiente per evitare degenerazioni nello spettro di massa dei fermioni.
Реэюме
Мы предлагаем и испольэуем процедуру, которая приводит к конструированию симметрии (K-симметрий), ответственных эа «естественное» сохранение « аромата » с индуцированных нейтральных процессах Хиггса в обобшенных моделях Вейнберга-Салама. Мы приводим больщой класс примеров непрерывных и дискретныхK-симметрии с проиэвольным числом фермионных генераторов. Также докаэывается достаточное условие, чтобы иэбежать вырожденных фермионных масс.
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Sartori, G. The concrete realization of the symmetries responsible for natural-flavour conservation laws. Nuov Cim A 55, 377–400 (1980). https://doi.org/10.1007/BF02900492
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DOI: https://doi.org/10.1007/BF02900492