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

LHCb Collaboration

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A search for B+ → Ds+K+K decays is performed using pp collision data corresponding to an integrated luminosity of 4.8 fb1, 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+ → Ds+K+K) = (7.1 ± 0.5 ± 0.6 ± 0.7) × 106, 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+ → Ds+D0. A search is also performed for the pure annihilation decay B+ → Ds+φ. No significant signal is observed and a limit of B(B+ → Ds+φ) < 4.9 × 107 (4.2 × 107) is set on the branching fraction at 95% (90%) confidence level.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Nov 15 2017

ASJC Scopus subject areas

  • General

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