Observation of the decay B-s(0) -> eta(c)phi and evidence for B-s(0) -> eta(c)pi(+)pi(-)
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Type
Journal Article
Abstract
A study of B0
s → ηcφ and B0
s → ηcπ
+π
− decays is performed using pp collision
data corresponding to an integrated luminosity of 3.0 fb−1
, collected with the LHCb detector
in Run 1 of the LHC. The observation of the decay B0
s → ηcφ is reported, where the
ηc meson is reconstructed in the pp¯, K+K−π
+π
−, π
+π
−π
+π
− and K+K−K+K− decay
modes and the φ(1020) in the K+K− decay mode. The decay B0
s → J/ψ φ is used as a
normalisation channel. Evidence is also reported for the decay B0
s → ηcπ
+π
−, where the
ηc meson is reconstructed in the pp¯ decay mode, using the decay B0
s → J/ψ π+π
− as a
normalisation channel. The measured branching fractions are
B(B
0
s → ηcφ) = (5.01 ± 0.53 ± 0.27 ± 0.63) × 10−4
,
B(B
0
s → ηcπ
+π
−) = (1.76 ± 0.59 ± 0.12 ± 0.29) × 10−4
,
where in each case the first uncertainty is statistical, the second systematic and the third
uncertainty is due to the limited knowledge of the external branching fractions.
s → ηcφ and B0
s → ηcπ
+π
− decays is performed using pp collision
data corresponding to an integrated luminosity of 3.0 fb−1
, collected with the LHCb detector
in Run 1 of the LHC. The observation of the decay B0
s → ηcφ is reported, where the
ηc meson is reconstructed in the pp¯, K+K−π
+π
−, π
+π
−π
+π
− and K+K−K+K− decay
modes and the φ(1020) in the K+K− decay mode. The decay B0
s → J/ψ φ is used as a
normalisation channel. Evidence is also reported for the decay B0
s → ηcπ
+π
−, where the
ηc meson is reconstructed in the pp¯ decay mode, using the decay B0
s → J/ψ π+π
− as a
normalisation channel. The measured branching fractions are
B(B
0
s → ηcφ) = (5.01 ± 0.53 ± 0.27 ± 0.63) × 10−4
,
B(B
0
s → ηcπ
+π
−) = (1.76 ± 0.59 ± 0.12 ± 0.29) × 10−4
,
where in each case the first uncertainty is statistical, the second systematic and the third
uncertainty is due to the limited knowledge of the external branching fractions.
Date Issued
2017-07-05
Date Acceptance
2017-06-17
Citation
Journal of High Energy Physics, 2017, 2017
ISSN
1029-8479
Publisher
Springer Verlag (Germany)
Journal / Book Title
Journal of High Energy Physics
Volume
2017
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
.
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Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
B physics
Branching fraction
Flavor physics
Hadron-Hadron scattering (experiments)
DISTRIBUTIONS
ERRORS
TOOL
Publication Status
Published
Article Number
021