Invariant-mass distributions $M(\mathrm{K}\uppi\uppi \kzero) - M(\mathrm{K}\uppi\uppi)$ of $\Dsone$ (top panels) and $\Dstwo$ (bottom panels) candidates and charge conjugates in the $2\pt24 \GeVc$ interval, for the \INEL and HMV0 (\nolinebreak{0--0.1\% V0M}) samples. The blue solid lines show the total fit functions described in the text, and the red dashed lines represent the combinatorial background. The raw-yield ($S$) values are reported together with their statistical uncertainties, as well as the estimated significance of the signal (Signif.). The bottom sub-panels of each panel display the differences between the data and the fit, normalized by the experimental uncertainties, to show the agreement between the data and the fit.