Quarkless mesons and quark-lepton-boson compositeness

A new classification of neutral non-strange mesons based on the combination of a fundamental boson a with four other bosons is presented. The m2 pattern obtained is related to microuniverse excitation. A composite model describes these bosons as well as quarks and leptons. It allows a smooth variation of R up to the quark value. Recent beam dump experiment aiming at axion discovery is reinterpreted using the subquark content of the proton. Axion mass could be 215 +- 2 keV. (author)