Abstract
Electromagnetic mass difference between neutral K* and charged K* has been calculated in the U(3)L × U(3)R chiral field theory of mesons. It has been revealed that the non-Abelian gauge structure of the massive Yang–Mills Lagrangian obeyed by K* plus VMD (vector meson dominance) causes the EM-mass of neutral one larger than charged one. Experiment supports this anomaly effect.
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