Abstract

Chirality under SUSY-GUT is suggested as a sufficient condition for composites to be massless, in addition to the necessary anomaly matching á la 't Hooft. This results in a very stringent set of self-consistency requirements, which dictates also the number and structure of the generations. As an illustration I present an [SU(3)] 3×[SUSY] model. It involves three generations (2 light + 1 heavy) and some other realistic features.

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