Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1997-06-26
Phys.Lett.B404:187-193,1997
Physics
High Energy Physics
High Energy Physics - Experiment
10 pages, 5 eps figures, RevTex
Scientific paper
10.1016/S0370-2693(97)00609-6
We report the observation of the doubly Cabibbo-suppressed decay $D^+\to K^+ \pi^- \pi^+$ 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 $D^+\to K^- \pi^+ \pi^+$ to be $B(D^+ \to K^+ \pi^- \pi^+) / B(D^+ \to K^- \pi^+ \pi^+) = (7.7 \pm 1.7 \pm 0.8) \times 10^{-3}$. A Dalitz plot analysis was performed to search for resonant structures.
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