First observation of B+→ D+s K+K decays and a search for B+ → D+s φ decays

LHCb Collaboration

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Abstract

A search for B+ → 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

B(B+→D+sK+K−)=(7.1±0.5±0.6±0.7)×10−6,

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+→D+sD¯¯¯¯0

. A search is also performed for the pure annihilation decay B+ → D s + ϕ. No significant signal is observed and a limit of

B(B+→D+sϕ)<4.9×10−7(4.2×10−7) is set on the branching fraction at 95% (90%) confidence level.
Original languageEnglish
Article number131
Number of pages22
JournalJournal of High Energy Physics
Volume2018
Issue number1
Early online date26 Jan 2018
DOIs
Publication statusPublished - Jan 2018

Keywords

  • B physics
  • Branching fraction
  • Hadron-Hadron scattering (experiments)
  • Rare decay

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  • Projects

    Bristol Consolidated Grant 2015-9

    Goldstein, J.

    1/10/1530/09/20

    Project: Research

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