Nonorthogonality of the Long- and Short-Lived Neutral Kaon States and Phenomenological Analysis of Experiments onCPNonconservation inK0Decay

It is noted that the nonzero charge asymmetry in the ${\left(K_L\right)}_{e3\mathrm{}}$ decay demonstrates the nonorthogonality of the ${K_L}^0$ and ${K_S}^0$ states. The result of the foregoing Letter on the charge asymmetry, combined with other measurements relevant to $\mathrm{CP}$ nonconservation in $K$ decay, are found to be consistent with a phenomenological analysis, which yields a pion-pion scattering phase shift consistent with other indirect observations only if the mass difference $m_L-m_S$ is negative.