SUCCESS OF MESON THEORY

1. (1) If all the pions exchanges are permitted It is straight forward to couple the corresponding fields to nucleons in such a way that charge independence results.
2. (2) Pion exchange idea also explains the saturation of nuclear forces. A study of complex nuclei shows that average binding energy per nucleon is constant which leads to the idea of saturation of nucleons.
3. (3) Pion exchange also eliminates the equation of magnetic moments of nucleons. A neutron as a particle with +ve core surrounded by –ve charged pions cloud exhibit a magnetic moment while remaining neutral in over all charge