Abstract
We present a composite model of quarks and lepton satisfying 't Hooft's anomaly conditions, where the electroweak interactions are left-right symmetric and are not associated with broken local flavour symmetries. The scales of left- and right-handed weak interactions are associated with the scale Λ H of hypercolour interactions responsible for preon binding. Understanding the small neutrino ( ν e) mass requires the existence of a Goldstone boson - the majoron - related to spontaneous breaking of global lepton number. Universality of weak interactions implies m νe ≈ 5–25eV and a heavy Majorana lepton, m N ≈ 10–60 GeV. The model predicts lifetimes for neutrinoless double β interactions (≈10 22±2yr) detectable in the next round of experiments and charged pseudo-Goldstone bosons with masses in the range 5–50 GeV.
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