Measurement of branching fraction ratios for <i>B</i><SUP>+</SUP> → <i>D</i><SUP>*+</SUP><i>D</i><SUP><i>-</i></SUP><i>K</i><SUP>+</SUP>, <i>B</i><SUP>+</SUP> → <i>D</i><SUP>*<i>-</i></SUP><i>D</i><SUP>+</SUP><i>K</i><SUP>+</SUP>, and <i>B</i><SUP>0</SUP> → <i>D</i><SUP>*<i>-</i></SUP><i>D</i><SUP>0</SUP><i>K</i><SUP>+</SUP> decays

Aaij, R, Beteta, C Abellan, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S
et al (show 997 more authors) (2020) Measurement of branching fraction ratios for <i>B</i><SUP>+</SUP> → <i>D</i><SUP>*+</SUP><i>D</i><SUP><i>-</i></SUP><i>K</i><SUP>+</SUP>, <i>B</i><SUP>+</SUP> → <i>D</i><SUP>*<i>-</i></SUP><i>D</i><SUP>+</SUP><i>K</i><SUP>+</SUP>, and <i>B</i><SUP>0</SUP> → <i>D</i><SUP>*<i>-</i></SUP><i>D</i><SUP>0</SUP><i>K</i><SUP>+</SUP> decays. JOURNAL OF HIGH ENERGY PHYSICS, 12 (12). 139-.

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A measurement of four branching-fraction ratios for three-body decays of $B$ mesons involving two open-charm hadrons in the final state is presented. Run 1 and Run 2 $pp$ collision data are used, recorded by the LHCb experiment at centre-of-mass energies $7$, $8$, and $13$ TeV and corresponding to an integrated luminosity of $9$ fb$^{-1}$. The measured branching-fraction ratios are \[ \begin{eqnarray} \frac{\mathcal{B} (B^+\to D^{*+}D^-K^+)}{\mathcal{B} (B^+\to \kern 0.2em\overline{\kern -0.2em D}{}^0 D^0 K^+)} &=& 0.517 \pm 0.015 \pm 0.013 \pm 0.011 , \\ \frac{\mathcal{B} (B^+\to D^{*-}D^+K^+)}{\mathcal{B} (B^+\to \kern 0.2em\overline{\kern -0.2em D}{}^0 D^0 K^+)} &=& 0.577 \pm 0.016 \pm 0.013 \pm 0.013 , \\ \frac{\mathcal{B} (B^0\to D^{*-}D^0K^+)}{\mathcal{B} (B^0\to D^- D^0 K^+)} &=& 1.754 \pm 0.028 \pm 0.016 \pm 0.035 , \\ \frac{\mathcal{B} (B^+\to D^{*+}D^-K^+)}{\mathcal{B} (B^+\to D^{*-}D^+K^+)} &=& 0.907 \pm 0.033 \pm 0.014 ,\end{eqnarray} \] where the first of the uncertainties is statistical, the second systematic, and the third is due to the uncertainties on the $D$-meson branching fractions. These are the most accurate measurements of these ratios to date.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at (LHCb public pages). v2 matches published version
Uncontrolled Keywords: B physics, Branching fraction, Flavor physics, Hadron-Hadron scattering (experiments)
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 01 Sep 2021 10:36
Last Modified: 14 Mar 2024 23:05
DOI: 10.1007/JHEP12(2020)139
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