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First observation of the rare B+ → D+K+π- decay

MPS-Authors
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Aquines Gutierrez,  O.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Blouw,  Johan
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Britsch,  Markward
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Fontana,  Marianna
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Popov,  Dmitry
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Schmelling,  Michael
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Zavertyaev,  Mikhail
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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1512.02494.pdf
(Preprint), 613KB

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Citation

LHCb Collaboration, Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Affolder, A., et al. (2016). First observation of the rare B+ → D+K+π- decay. Physical Review D, 93(05): 051101. doi:10.1103/PhysRevD.93.051101.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002B-2742-F
Abstract
The $B^{+}\to D^{+} K^{+} \pi^{-}$ decay is observed in a data sample
corresponding to $3.0\,{\rm fb}^{-1}$ of $pp$ collision data recorded by the
LHCb experiment during 2011 and 2012. The signal significance is $8\,\sigma$
and the branching fraction is measured to be ${\cal B}\left(B^{+}\to D^{+}
K^{+} \pi^{-}\right) = (5.31 \pm 0.90 \pm 0.48 \pm 0.35)\times 10^{-6}$, where
the uncertainties are statistical, systematic and due to the normalisation mode
$B^{+}\to D^{-} K^{+} \pi^{+}$, respectively. The Dalitz plot appears to be
dominated by broad structures. Angular distributions are exploited to search
for quasi-two-body contributions from $B^{+}\to D^{*}_{2}(2460)^{0}K^{+}$ and
$B^{+}\to D^{+} K^{*}(892)^{0}$ decays. No significant signals are observed and
upper limits are set on their branching fractions.