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

the FOCUS Collaboration·J. Link
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Abstract

Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the branching ratio for the Cabibbo-favored decay mode $D^0 \to K^-K^+π^-π^+$. From a sample of $2669 \pm 101$ fully reconstructed $D^0 \to K^-K^+π^-π^+$ events, we measure $Γ(D^0 \to K^-K^+π^-π^+)/Γ(D^0 \to K^-π^-π^+π^+) = 0.0295 \pm 0.0011(stat.) \pm 0.0008(syst.)$. 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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the FOCUS Collaboration, J. Link. 2005-03-21. Study of the decay mode D^0 -> K-K+pi-pi+. https://doi.org/10.1016/j.physletb.2005.02.005

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