Continuing the program developed in a previous paper, a "superconductive" solution describing the proton-neutron doublet is obtained from a nonlinear spinor field Lagrangian. We find the pions of finite mass as nucleon-antinucleon bound states by introducing a small bare mass into the Lagrangian which otherwise possesses a certain type of the γ5 invariance. In addition, heavier mesons and two-nucleon bound states are obtained in the same approximation. On the basis of numerical mass relations, it is suggested that the bare nucleon field is similar to the electron-neutrino field, and further speculations are made concerning the complete description of the baryons and leptons. © 1961 The American Physical Society.
CITATION STYLE
Nambu, Y., & Jona-Lasinio, G. (1961). Dynamical model of elementary particles based on an analogy with superconductivity. II. Physical Review, 124(1), 246–254. https://doi.org/10.1103/PhysRev.124.246
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