# Measurement of Branching Fractions and Resonance Contributions for $B^0 \to \bar{D}^0 K^+ \pi^- and Search for B^0 \to D^0 K^+ \pi^-$ Decays

Abstract : Using 226 million $\Upsilon(4S)\to B\bar{B}$ events collected with the BaBar detector at the PEP-II $e^+e^-$ storage ring at the Stanford Linear Accelerator Center, we measure the branching fraction for $B^0\to \bar{D}^0 K^+\pi^-$, excluding $B^0\to D^{*-} K^+$ to be ${\cal B}(B^0\to \bar{D}^0 K^+\pi^-) = (88 \pm 15 \pm 9)\times 10^{-6} .$ We observe $B^0\to \bar{D}^0 K^*(892)^0$ and $B^0\to D_2^*(2460)^- K^+$ contributions. The ratio of branching fractions ${\cal B}(B^0\to D^{*-}K^+)/{\cal B}(B^0\to D^{*-}\pi^+) = (7.76\pm 0.34 \pm 0.29)%$ is measured separately. The branching fraction for the suppressed mode $B^0\to D^0 K^+\pi^-$ is ${\cal B}(B^0\to D^0 K^+\pi^-) < 19 \times 10^{-6}$ at the 90% confidence level.
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http://hal.in2p3.fr/in2p3-00025520
Contributor : Dominique Girod <>
Submitted on : Friday, January 27, 2006 - 4:27:20 PM
Last modification on : Wednesday, September 16, 2020 - 4:23:36 PM

### Citation

B. Aubert, R. Barate, D. Boutigny, F. Couderc, Y. Karyotakis, et al.. Measurement of Branching Fractions and Resonance Contributions for $B^0 \to \bar{D}^0 K^+ \pi^- and Search for B^0 \to D^0 K^+ \pi^-$ Decays. Physical Review Letters, American Physical Society, 2006, 96, pp.011803. ⟨10.1103/PhysRevLett.96.011803⟩. ⟨in2p3-00025520⟩

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