The charge radii and the decay rates of the pseudoscalar meson
Yongkyu Ko
Abstract
The charge radii and the decay rates of the pion and kaons are calculated, using the relativistic equation of motion with a linear potential. Those physical quantities are quite well explained with the current quark masses in the case of the pion. It is found that the Van Royen-Weisskopf paradox can be cleared out only in the linear potential model by considering the color degree of freedom of the quark in the meson. The physical quantities for the kaon are not so satisfactory that it should be required to reconsider the Cabibbo-Kobayashi-Maskawa matrix element in the kaon decay.
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