First observation of <i>B</i><SUP>+</SUP> → <i>D<sub>s</sub></i><SUP>+</SUP> <i>K</i><SUP>+</SUP> <i>K</i><SUP>-</SUP> decays and a search for <i>B</i><SUP>+</SUP> → <i>D<sub>s</sub></i><SUP>+</SUP> φ decays



Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Albero, A Alfonso, Ali, S
et al (show 791 more authors) (2018) First observation of <i>B</i><SUP>+</SUP> → <i>D<sub>s</sub></i><SUP>+</SUP> <i>K</i><SUP>+</SUP> <i>K</i><SUP>-</SUP> decays and a search for <i>B</i><SUP>+</SUP> → <i>D<sub>s</sub></i><SUP>+</SUP> φ decays. JOURNAL OF HIGH ENERGY PHYSICS, 01 (1). 131-.

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Abstract

A search for $B^{+} \to D_s^{+}K^{+}K^{-}$ decays is performed using $pp$ collision data corresponding to an integrated luminosity of 4.8 fb$^{-1}$, collected at centre-of-mass energies of 7, 8 and 13$\,$TeV with the LHCb experiment. A significant signal is observed for the first time and the branching fraction is determined to be \begin{equation*} \mathcal{B}(B^{+} \to D_s^{+}K^{+}K^{-} ) = (7.1 \pm 0.5 \pm 0.6 \pm 0.7) \times 10^{-6}, \end{equation*} where the first uncertainty is statistical, the second systematic and the third due to the uncertainty on the branching fraction of the normalisation mode $B^{+} \to D_s^{+} \overline{\kern -0.2em D}^{0}$. A search is also performed for the pure annihilation decay $B^{+} \to D_s^{+}\phi$. No significant signal is observed and a limit of \begin{equation*} \mathcal{B}(B^{+} \to D_s^{+}\phi) < 4.9 \times 10^{-7}~(4.2 \times 10^{-7}) \end{equation*} is set on the branching fraction at 95$\%$ (90$\%$) confidence level.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2017-032.html
Uncontrolled Keywords: B physics, Branching fraction, Hadron-Hadron scattering (experiments), Rare decay
Depositing User: Symplectic Admin
Date Deposited: 23 Apr 2018 08:24
Last Modified: 14 Oct 2023 10:58
DOI: 10.1007/JHEP01(2018)131
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3020511