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Figure 3

Invariant-mass distributions of $\DtoKpi$ candidates (andcharge conjugates) for $0< \pt< 0.5~\gev/c$. The left panel displaysthe invariant-mass distribution of all ULS K$\pi$ pairs together with thebackground distribution estimated with the track-rotation technique. The right panel shows the invariant-mass distributions after subtraction of the background from the track-rotation technique. The fit function is superimposed.
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