@Article{LHCbCollaborationAaij_etal2018,
author="LHCb Collaboration (Aaij, R. et al
and Garcia Martin, L. M.
and Henry, L.
and Martinez-Vidal, F.
and Oyanguren, A.
and Remon Alepuz, C.
and Ruiz Valls, P.
and Ruiz Vidal, J.
and Sanchez Mayordomo, C.",
title="First observation of B+ -> D-s(+) K+ K- decays and a search for B+ -> D-s(+) phi decays",
journal="Journal of High Energy Physics",
year="2018",
publisher="Springer",
volume="01",
number="1",
pages="131--22pp",
optkeywords="B physics; Branching fraction; Hadron-Hadron scattering (experiments); Rare decay",
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-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.",
optnote="WOS:000423792000001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3464), last updated on Sun, 11 Feb 2018 19:59:12 +0000",
issn="1029-8479",
doi="10.1007/JHEP01(2018)131https://arxiv.org/abs/1711.05637",
opturl="http://arxiv.org/abs/1711.05637",
opturl="https://doi.org/10.1007/JHEP01(2018)131https://arxiv.org/abs/1711.05637",
archivePrefix="arXiv",
eprint="1711.05637",
language="English"
}