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

The Lhcb Collaboration

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A search for B+ → Ds +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+→Ds+K+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+→Ds+D¯0. 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)<4.9×10−7(4.2×10−7) is set on the branching fraction at 95% (90%) confidence level.[Figure not available: see fulltext.].

Original languageEnglish (US)
Article number131
JournalJournal of High Energy Physics
Volume2018
Issue number1
DOIs
StatePublished - Jan 1 2018

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decay
center of mass
confidence
luminosity
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energy

Keywords

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

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

First observation of B + → Ds + K + K decays and a search for B + → Ds + ϕ decays. / The Lhcb Collaboration.

In: Journal of High Energy Physics, Vol. 2018, No. 1, 131, 01.01.2018.

Research output: Contribution to journalArticle

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abstract = "A search for B+ → Ds +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+→Ds+K+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+→Ds+D¯0. 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)<4.9×10−7(4.2×10−7) is set on the branching fraction at 95{\%} (90{\%}) confidence level.[Figure not available: see fulltext.].",
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AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

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AU - Auriemma, G.

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N2 - A search for B+ → Ds +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+→Ds+K+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+→Ds+D¯0. 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)<4.9×10−7(4.2×10−7) is set on the branching fraction at 95% (90%) confidence level.[Figure not available: see fulltext.].

AB - A search for B+ → Ds +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+→Ds+K+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+→Ds+D¯0. 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)<4.9×10−7(4.2×10−7) is set on the branching fraction at 95% (90%) confidence level.[Figure not available: see fulltext.].

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