Abstract

A model is presented in which quarks and leptons are composites of three spin-½ preons and a scalar preon. The model is an extension of the rishon model and consists of two spin-½ preons T, V and a scalar preon S as the fundamental building blocks of matter. Assuming distinguishability of states due to the order assigned to the preons in forming the quark and lepton states, the concepts of flavour, colour and generation number acquire meaning only at the level of compositeness. The model predicts four generations of conventional quarks and leptons.

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