Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2005-09-23
Phys.Rev.Lett.96:011803,2006
Physics
High Energy Physics
High Energy Physics - Experiment
7 pages, 3 figures, published on Phys.Rev.Lett. 96, 011803 (2006)
Scientific paper
10.1103/PhysRevLett.96.011803
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.
"The BABAR Collaboration
Aubert B.
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