Measurement of the time-dependent CP asymmetries in B-s(0) -> J/psi K-S(0)
File(s)
Published version
Published version
Author(s)
Type
Journal Article
Abstract
The first measurement of decay-time-dependent CP asymmetries in the
decay B0
s → J/ψK0
S
and an updated measurement of the ratio of branching fractions
B(B0
s → J/ψK0
S
)/B(B0 → J/ψK0
S
) are presented. The results are obtained using data
corresponding to an integrated luminosity of 3.0 fb−1 of proton-proton collisions recorded
with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The results on the CP
asymmetries are
A∆Γ(B
0
s → J/ψK0
S
) = 0.49 ±
0.77
0.65 (stat) ± 0.06(syst),
Cdir(B
0
s → J/ψK0
S
) = −0.28 ± 0.41(stat) ± 0.08(syst),
Smix(B
0
s → J/ψK0
S
) = −0.08 ± 0.40(stat) ± 0.08(syst).
The ratio B(B0
s → J/ψK0
S
)/B(B0 → J/ψK0
S
) is measured to be
0.0431 ± 0.0017(stat) ± 0.0012(syst) ± 0.0025(fs/fd),
where the last uncertainty is due to the knowledge of the B0
s and B0 production fractions.
decay B0
s → J/ψK0
S
and an updated measurement of the ratio of branching fractions
B(B0
s → J/ψK0
S
)/B(B0 → J/ψK0
S
) are presented. The results are obtained using data
corresponding to an integrated luminosity of 3.0 fb−1 of proton-proton collisions recorded
with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The results on the CP
asymmetries are
A∆Γ(B
0
s → J/ψK0
S
) = 0.49 ±
0.77
0.65 (stat) ± 0.06(syst),
Cdir(B
0
s → J/ψK0
S
) = −0.28 ± 0.41(stat) ± 0.08(syst),
Smix(B
0
s → J/ψK0
S
) = −0.08 ± 0.40(stat) ± 0.08(syst).
The ratio B(B0
s → J/ψK0
S
)/B(B0 → J/ψK0
S
) is measured to be
0.0431 ± 0.0017(stat) ± 0.0012(syst) ± 0.0025(fs/fd),
where the last uncertainty is due to the knowledge of the B0
s and B0 production fractions.
Date Issued
2015-06-18
Date Acceptance
2015-05-27
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
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
CP violation
Hadron-Hadron Scattering
Branching fraction
B physics
Flavor physics
EXTRACTING GAMMA
DECAY
DISTRIBUTIONS
VIOLATION
TOOL
Publication Status
Published
Article Number
131