Summary
We account for the number of families of quarks and leptons by considering a composite model of preon. The doublets are composed of preons and antipreons. From theC, P, T transformation and theSU(2)L×U(1) gauge theory, it is shown that there are just four families and, moreover,CP is violated in each family.
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Sugita, K., Okamoto, Y. & Sekine, M. Four families in preon model. Nuov Cim A 106, 771–775 (1993). https://doi.org/10.1007/BF02771492
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DOI: https://doi.org/10.1007/BF02771492