Khachatryan, V, Sirunyan, AM, Tumasyan, A et al. (90 more authors) (2016) Measurement of the CP-violating weak phase φ_s and the decay width difference Δ⌈_s using the Bº_s →J/ψφ(1020) decay channel in pp collisions at √s=8 TeV. Physics Letters B, 757. pp. 97-120. ISSN 0370-2693
Abstract
The CP-violating weak phase φ s of the Bs0 meson and the decay width difference δΓ s of the Bs0 light and heavy mass eigenstates are measured with the CMS detector at the LHC using a data sample of Bs0→J/ψφ(1020)→μ+μ-K+K- decays. The analysed data set corresponds to an integrated luminosity of 19.7fb -1 collected in pp collisions at a centre-of-mass energy of 8TeV. A total of 49 200 reconstructed Bs0 decays are used to extract the values of φ s and δΓ s by performing a time-dependent and flavour-tagged angular analysis of the μ + μ - K + K - final state. The weak phase is measured to be φ s =-0.075±0.097(stat)±0.031(syst) rad, and the decay width difference is δΓ s =0.095±0.013(stat)±0.007(syst) ps -1 .
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | CMS; Physics; B-physics; CP violation |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 13 Feb 2018 12:43 |
Last Modified: | 13 Feb 2018 12:43 |
Published Version: | https://doi.org/10.1016/j.physletb.2016.03.046 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.physletb.2016.03.046 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:127354 |