Higgs-boson-exchange models ofCPviolation andK→2π

Work by Deshpande and Sanda, which appears to invalidate Higgs-boson-exchange models of $\mathrm{CP}$ noninvariance, is buttressed by (i) use of the MIT bag model to calculate matrix elements, (ii) use of experimental rather than calculated numbers for the $K\to 2\pi$ decay amplitude and the $K_L-K_S$ mass difference, and (iii) inclusion of possible $t$-quark effects. We conclude that, barring accidental cancellations, such Higgs-boson-exchange models are incompatible with experiment.