A completely relativistic quark model in the Bethe-Salpter framework is employed to calculate the exclusive production ratio of the neutral over charged Kaon pair in $e^+e^-$ annihilation continuum region for center of mass energies smaller than the $J/\Psi$ mass. The valence quark charge plays the key role. The cancellation of the diagrams for the same charge case (in $K_S + K_L$) and the non-cancellation of the diagrams for the different charge case (in $K^-+K^+$) lead to the ratio as $(m_s-m_d)^2/M_{Kaon}^2 \sim 1/10$.

中文翻译：

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通过相对论夸克模型在 e+e− 湮灭连续体中中性与带电 kaon 对的排他产生比

采用Bethe-Salpter框架中的完全相对论夸克模型计算质心能量小于$J/\的$e^+e^-$湮灭连续区中中性带电Kaon对的排他性产生率Psi$ 质量。价夸克电荷起着关键作用。取消相同收费情况下的图表（在 $K_S + K_L$ 中）和不取消不同收费情况下的图表（在 $K^-+K^+$ 中）导致比率为 $( m_s-m_d)^2/M_{Kaon}^2 \sim 1/10$。