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Type: Journal article
Title: Measurement of the CP-violating phase φs and the Bs⁰ meson decay width difference with Bs⁰ → J/ψφ decays in ATLAS
Other Titles: Measurement of the CP-violating phase phi s and the Bs(0) meson decay width difference with Bs(0) -> J/psi phi decays in ATLAS
Author: The, A.
Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Aben, R.
Abolins, M.
AbouZeid, O.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adamczyk, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
Affolder, A.
Agatonovic-Jovin, T.
et al.
Citation: Journal of High Energy Physics, 2016; 2016(8):147-1-147-45
Publisher: Springer
Issue Date: 2016
ISSN: 1126-6708
Statement of
G. Aad ... Paul D. Jackson … Lawrence Lee-Jr … Andreas Petridis … Nitesh Soni … Martin White … et al. (ATLAS Collaboration)
Abstract: A measurement of the B s 0 decay parameters in the B s 0  → J/ψϕ channel using an integrated luminosity of 14.3 fb−1 collected by the ATLAS detector from 8 TeV pp collisions at the LHC is presented. The measured parameters include the CP -violating phase ϕ s , the decay width Γ s and the width difference between the mass eigenstates ΔΓ s . The values measured for the physical parameters are statistically combined with those from 4.9 fb−1 of 7 TeV data, leading to the following: ϕs=−0.090±0.078(stat.)±0.041(syst.)radΔΓs=0.085±0.011(stat.)±0.007(syst.)ps−1Γs=0.675±0.003(stat.)±0.003(syst.)ps−1. In the analysis the parameter ΔΓ s is constrained to be positive. Results for ϕ s and ΔΓ s are also presented as 68% and 95% likelihood contours in the ϕ s -ΔΓ s plane. Also measured in this decay channel are the transversity amplitudes and corresponding strong phases. All measurements are in agreement with the Standard Model predictions.
Keywords: B physics, CP violation; flavor physics; Hadron-Hadron scattering (experiments)
Rights: © The Author(s) 2016. This article is published under an open access license. Please check the 'Copyright Information' section for details of this license and what re-use is permitted. If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and re-use information, please contact the Rights and Permissions team.
RMID: 0030055090
DOI: 10.1007/JHEP08(2016)147
Appears in Collections:Physics publications

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