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arXiv · hep-ex/9706025

The doubly Cabibbo-suppressed decay $D^+\to K^+ π^- π^+$

The Fermilab E791 Collaboration
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Abstract

We report the observation of the doubly Cabibbo-suppressed decay $D^+\to K^+ π^- π^+$ in data from Fermilab charm hadroproduction experiment E791. With a signal of 59 \pm 13 events we measured the ratio of the branching fraction for this mode to that of the Cabibbo-favored decay $D^+\to K^- π^+ π^+$ to be $B(D^+ \to K^+ π^- π^+) / B(D^+ \to K^- π^+ π^+) = (7.7 \pm 1.7 \pm 0.8) \times 10^{-3}$. A Dalitz plot analysis was performed to search for resonant structures.

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The Fermilab E791 Collaboration. 1997-06-26. The doubly Cabibbo-suppressed decay $D^+\to K^+ π^- π^+$. https://doi.org/10.1016/s0370-2693(97)00609-6

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