First observation of the decay <i>B</i><SUP>0 </SUP>→ <i>D</i><SUP>0</SUP>(<i>D</i>)over-bar<SUP>0</SUP><i>K</i><SUP>+</SUP>π<SUP>-</SUP>

Aaij, R, Beteta, C Abellan, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S
et al (show 963 more authors) (2020) First observation of the decay <i>B</i><SUP>0 </SUP>→ <i>D</i><SUP>0</SUP>(<i>D</i>)over-bar<SUP>0</SUP><i>K</i><SUP>+</SUP>π<SUP>-</SUP>. PHYSICAL REVIEW D, 102 (5). 051102-.

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The first observation of the decay $B^0 \rightarrow D^0 \overline{D}{}^0 K^+ \pi^-$ is reported using proton-proton collision data corresponding to an integrated luminosity of 4.7 $\mathrm{fb}^{-1}$ collected by the LHCb experiment in 2011, 2012 and 2016. The measurement is performed in the full kinematically allowed range of the decay outside of the $D^{*-}$ region. The ratio of the branching fraction relative to that of the control channel $B^0 \rightarrow D^{*-} D^0 K^+$ is measured to be $\mathcal{R} = (14.2 \pm 1.1 \pm 1.0)\%$, where the first uncertainty is statistical and the second is systematic. The absolute branching fraction of $B^0 \rightarrow D^0 \overline{D}{}^0 K^+ \pi^-$ decays is thus determined to be $\mathcal{B}(B^0 \rightarrow D^0 \overline{D}{}^0 K^+ \pi^-) = (3.50 \pm 0.27 \pm 0.26 \pm 0.30) \times 10^{-4}$, where the third uncertainty is due to the branching fraction of the control channel. This decay mode is expected to provide insights to spectroscopy and the charm-loop contributions in rare semileptonic decays.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at (LHCb public pages)
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 18 Nov 2020 11:48
Last Modified: 18 Oct 2023 08:41
DOI: 10.1103/PhysRevD.102.051102
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