Summary
Bound states of lepton-eavy-meson systems like hydrogen-atom are studied in a composite model of leptons and mesons. Binding force is originated from the composite structure of leptons and mesons, that is, a short-range residual interaction induced by confining force among subconstituent particles. Bound states appear at energies below but very near the heavy-meson mass, if a fine tuning condition is satisfied. Characteristic decays of the bound states and contribution to the decay Z∘ → ℓōlγ are remarked.
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Kobayashi, T. Hydrogen-like bound states of lepton-heavy-meson systems in composite model for leptons. Lett. Nuovo Cimento 42, 111–116 (1985). https://doi.org/10.1007/BF02748343
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DOI: https://doi.org/10.1007/BF02748343