%0 Journal Article
%T First observation of B+ -> D-s(+) K+ K- decays and a search for B+ -> D-s(+) phi decays
%A LHCb Collaboration (Aaij, R. et al
%A Garcia Martin, L. M.
%A Henry, L.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Remon Alepuz, C.
%A Ruiz Valls, P.
%A Ruiz Vidal, J.
%A Sanchez Mayordomo, C.
%J Journal of High Energy Physics
%D 2018
%V 01
%N 1
%I Springer
%@ 1029-8479
%G English
%F LHCbCollaborationAaij_etal2018
%O WOS:000423792000001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3464), last updated on Sun, 11 Feb 2018 19:59:12 +0000
%X 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-s(+) K+ K-) = (7.1 +/- 0.5 +/- 0.6 +/- 0.7) x 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-s(+)(D) over bar (0). A search is also performed for the pure annihilation decay B+ -> D-s(+)(D) over bar (0). No significant signal is observed and a limit of B(B+ -> D-s(+) phi) < 4.9 x 10(-7) (4.2 x 10(-7)) is set on the branching fraction at 95% (90%) confidence level.
%K B physics
%K Branching fraction
%K Hadron-Hadron scattering (experiments)
%K Rare decay
%R 10.1007/JHEP01(2018)131https://arxiv.org/abs/1711.05637
%U http://arxiv.org/abs/1711.05637
%U https://doi.org/10.1007/JHEP01(2018)131https://arxiv.org/abs/1711.05637
%P 131-22pp