Measurement of CP violation in the B-s(0)-> phi phi decay and search for the B-0 -> phi phi decay
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Published version
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Author(s)
Type
Journal Article
Abstract
A measurement of the time-dependent CP-violating asymmetry in B0s→ϕϕ decays is presented. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 5.0 fb−1 collected by the LHCb experiment at centre-of-mass energies s√ = 7 TeV in 2011, 8 TeV in 2012 and 13 TeV in 2015 and 2016, a signal yield of around 9000 B0s→ϕϕ decays is obtained. The CP-violating phase ϕss¯¯¯ss is measured to be −0.073 ± 0.115(stat) ± 0.027(syst) rad, under the assumption it is independent of the helicity of the ϕϕ decay. In addition, the CP-violating phases of the transverse polarisations under the assumption of CP conservation of the longitudinal phase are measured. The helicity-independent direct CP-violation parameter is also measured, and is found to be |λ| = 0.99 ± 0.05(stat) ± 0.01(syst). In addition, T-odd triple-product asymmetries are measured. The results obtained are consistent with the hypothesis of CP conservation in b¯¯→s¯¯¯ss¯¯¯s transitions. Finally, a limit on the branching fraction of the B0 → ϕϕ decay is determined to be B(B0→ϕϕ)<2.7×10−8 at 90 % confidence level.
Date Issued
2019-12-23
Date Acceptance
2019-12-08
Citation
The Journal of High Energy Physics, 2019, 2019 (12), pp.1-34
ISSN
1029-8479
Publisher
Springer Verlag (Germany)
Start Page
1
End Page
34
Journal / Book Title
The Journal of High Energy Physics
Volume
2019
Issue
12
Copyright Statement
This article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0) (https://creativecommons.org/licenses/by/4.0/), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.
Attribution License (CC-BY 4.0) (https://creativecommons.org/licenses/by/4.0/), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.
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http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000504709300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
Hadron-Hadron scattering (experiments)
UNITARY SYMMETRY
TOOL
Publication Status
Published
Article Number
ARTN 155
Date Publish Online
2019-12-23