Abstract
A fairly general current-current form for the $\mathrm{CP}$-violating interaction is investigated in the phenomenological Lagrangian framework. Special attention is given to the computation of both the $\mathrm{CP}$-conserving and $\mathrm{CP}$-violating self-masses in the ${K}_{L}\ensuremath{-}{K}_{S}$ system. In addition the relevant amplitudes appearing in the neutral-kaon decay matrix are calculated. We find that several kinds of models naturally give the same results as the superweak theory, within present experimental accuracy.
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