First observation and measurement of the branching fraction for the decay B-s(0) -> D-s*K--/+(+/-)
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Author(s)
Type
Journal Article
Abstract
The first observation of the B0
s → D∗∓
s K± decay is reported using 3.0 fb−1
of proton-proton collision data collected by the LHCb experiment. The D∗∓
s mesons are
reconstructed through the decay chain D∗∓
s → γD∓
s
(K∓K±π
∓). The branching fraction
relative to that for B0
s → D∗−
s π
+ decays is measured to be
B(B
0
s → D∗∓
s K±)/B(B
0
s → D∗−
s π
+) = 0.068 ± 0.005+0.003
−0.002 ,
where the first uncertainty is statistical and the second is systematic. Using a recent
measurement of B(B0
s → D∗−
s π
+), the absolute branching fraction of B0
s → D∗∓
s K± is
measured as
B(B
0
s → D∗∓
s K±) = (16.3 ± 1.2(stat)+0.7
−0.5
(syst) ± 4.8(norm)) × 10−5
,
where the third uncertainty is due to the uncertainty on the branching fraction of the
normalisation channel.
s → D∗∓
s K± decay is reported using 3.0 fb−1
of proton-proton collision data collected by the LHCb experiment. The D∗∓
s mesons are
reconstructed through the decay chain D∗∓
s → γD∓
s
(K∓K±π
∓). The branching fraction
relative to that for B0
s → D∗−
s π
+ decays is measured to be
B(B
0
s → D∗∓
s K±)/B(B
0
s → D∗−
s π
+) = 0.068 ± 0.005+0.003
−0.002 ,
where the first uncertainty is statistical and the second is systematic. Using a recent
measurement of B(B0
s → D∗−
s π
+), the absolute branching fraction of B0
s → D∗∓
s K± is
measured as
B(B
0
s → D∗∓
s K±) = (16.3 ± 1.2(stat)+0.7
−0.5
(syst) ± 4.8(norm)) × 10−5
,
where the third uncertainty is due to the uncertainty on the branching fraction of the
normalisation channel.
Date Issued
2015-06-18
Date Acceptance
2015-05-29
Citation
Journal of High Energy Physics, 2015, 2015 (6)
ISSN
1126-6708
Publisher
Springer
Journal / Book Title
Journal of High Energy Physics
Volume
2015
Issue
6
Copyright Statement
© CERN on behalf of the LHCb collaboration, license CC-BY-4.0
License URL
Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
Branching fraction
B physics
Flavor physics
Hadron-Hadron Scattering
TOOL
Publication Status
Published
Article Number
130