TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Henry, L.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Valls, P.
AU  - Ruiz Vidal, J.
AU  - Sanchez Mayordomo, C.
PY  - 2018
DA  - 2018//
TI  - First observation of B+ -> D-s(+) K+ K- decays and a search for B+ -> D-s(+) phi decays
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 131
EP  - 22pp
VL  - 01
IS  - 1
PB  - Springer
KW  - B physics
KW  - Branching fraction
KW  - Hadron-Hadron scattering (experiments)
KW  - Rare decay
AB  - 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.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1711.05637
UR  - https://doi.org/10.1007/JHEP01(2018)131https://arxiv.org/abs/1711.05637
DO  - 10.1007/JHEP01(2018)131https://arxiv.org/abs/1711.05637
LA  - English
N1  - WOS:000423792000001
ID  - LHCbCollaborationAaij_etal2018
ER  -