Study of the decay mode D^0 -> K-K+pi-pi+

Details Study of the decay mode D^0 -> K-K+pi-pi+ Study of the decay mode D^0 -> K-K+pi-pi+

2004-11-08

arxiv.org/abs/hep-ex/0411031v2

Phys.Lett.B610:225-234,2005

Physics

High Energy Physics

High Energy Physics - Experiment

19 pages, 6 figures, to be submitted to Physics Letters B

Scientific paper

10.1016/j.physletb.2005.02.005

Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the branching ratio for the Cabibbo-favored decay mode $D^0 \to K^-K^+\pi^-\pi^+$. From a sample of $2669 \pm 101$ fully reconstructed $D^0 \to K^-K^+\pi^-\pi^+$ events, we measure $\Gamma(D^0 \to K^-K^+\pi^-\pi^+)/\Gamma(D^0 \to K^-\pi^-\pi^+\pi^+) = 0.0295 \pm 0.0011(stat.) \pm 0.0008(syst.)$. A coherent amplitude analysis has been performed to determine the resonant substructure of this decay mode. This analysis reveals a dominant contribution from $D^0 \to K_1^+ K-$ modes.

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