First observation of B+ -> D-s(+) K+ K- decays and a search for B+ -> D-s(+) phi decays
File(s)
Published version
Author(s)
Type
Journal Article
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) × 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+
sD
0
. A search
is also performed for the pure annihilation decay B+ → D+
s φ. No significant signal is
observed and a limit of
B(B
+ → D+
s φ) < 4.9 × 10−7
(4.2 × 10−7
)
is set on the branching fraction at 95% (90%) confidence level.
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) × 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+
sD
0
. A search
is also performed for the pure annihilation decay B+ → D+
s φ. No significant signal is
observed and a limit of
B(B
+ → D+
s φ) < 4.9 × 10−7
(4.2 × 10−7
)
is set on the branching fraction at 95% (90%) confidence level.
Date Issued
2018-01-26
Date Acceptance
2018-01-18
Citation
Journal of High Energy Physics, 2018, 2018 (1)
ISSN
1029-8479
Publisher
Springer Verlag (Germany)
Journal / Book Title
Journal of High Energy Physics
Volume
2018
Issue
1
Copyright Statement
Open Access, Copyright CERN,
for the benefit of the LHCb Collaboration.
Article funded by SCOAP3
for the benefit of the LHCb Collaboration.
Article funded by SCOAP3
License URL
Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
B physics
Branching fraction
Hadron-Hadron scattering (experiments)
Rare decay
PHYSICS
TOOL
Publication Status
Published
Article Number
131