Observation of the <i>B</i><SUP>+</SUP> → <i>D</i>*<SUP>-</SUP><i>K</i><SUP>+</SUP> <i>π</i><SUP>+</SUP> decay

Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G
et al (show 763 more authors) (2017) Observation of the <i>B</i><SUP>+</SUP> → <i>D</i>*<SUP>-</SUP><i>K</i><SUP>+</SUP> <i>π</i><SUP>+</SUP> decay. PHYSICAL REVIEW D, 96 (1). 011101-.

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The $B^+ \to D^{*-}K^+\pi^+$ decay potentially provides an excellent way to investigate charm meson spectroscopy. The decay is searched for in a sample of proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of $3~{\rm fb}^{-1}$. A clear signal is observed, and the ratio of its branching fraction to that of the $B^+ \to D^{*-}\pi^+\pi^+$ normalisation channel is measured to be \begin{equation*} \frac{\mathcal{B}(B^+ \to D^{*-}K^+\pi^+)}{\mathcal{B}(B^+ \to D^{*-}\pi^+\pi^+)} = \left( 6.39 \pm 0.27 \pm 0.48 \right) \times 10^{-2} \, , \end{equation*} where the first uncertainty is statistical and the second is systematic. This is the first observation of the $B^+ \to D^{*-}K^+\pi^+$ decay.

Item Type: Article
Additional Information: 9 pages + authorlist. Submitted to PRD. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-006.html
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 07 Apr 2017 13:06
Last Modified: 14 Oct 2023 09:15
DOI: 10.1103/PhysRevD.96.011101
Open Access URL: https://arxiv.org/pdf/1701.01856
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3006873