First observation of B⁺ → Ds⁺K⁺K⁻ decays and a search for B⁺ → Ds⁺ϕ decays
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Alfonso Albero, A.
Ali, S.
Date Issued
January 2018
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
Aaij, R. et al. "First observation of B⁺ → Ds⁺K⁺K⁻ decays and a search for B⁺ → Ds⁺ϕ decays." Journal of High Energy Physics 2018 (January 2018): 131 © 2018 The Author(s)
Version
Final published version
Abstract
A search for B⁺ → D[subscript 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 ℬB⁺→ D[subscript s]⁺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⁺ → D[subscript s]⁺ 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⁺ → D[subscript s] ⁺ ϕ) < 4.9 × 10 ⁻⁷ (4.2 × 10 ⁻⁷) is set on the branching fraction at 95% (90%) confidence level.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1007/JHEP01(2018)131
