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Article
Report number arXiv:1911.01114 ; CERN-EP-2019-225 ; LHCb-PAPER-2019-032 ; LHCB-PAPER-2019-032
Title Updated measurement of decay-time-dependent CP asymmetries in D0K+K and D0π+π decays
Related titleUpdated measurement of decay-time-dependent CP asymmetries in D0K+K and D0π+π decays
Author(s) LHCb Collaboration  顯示全部 916 名作者
Publication 2020-01-14
Imprint 04 Nov 2019
Number of pages 12
Note All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-032.html (LHCb public pages)
In: Phys. Rev. D 101 (2020) 012005
DOI 10.1103/PhysRevD.101.012005 (publication)
Subject category Particle Physics - Experiment ; hep-ex
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; charm physics ; CP violation
Abstract A search for decay-time-dependent charge-parity (CP) asymmetry in D0K+K and D0π+π decays is performed at the LHCb experiment using proton-proton collision data recorded at a center-of-mass energy of 13TeV, and corresponding to an integrated luminosity of 5.4fb1. The D0 mesons are required to originate from semileptonic decays of b hadrons, such that the charge of the muon identifies the flavor of the neutral D meson at production. The asymmetries in the effective decay widths of D0 and ¯D0 mesons are determined to be AΓ(K+K)=(4.3±3.6±0.5)×104 and AΓ(π+π)=(2.2±7.0±0.8)×104, where the uncertainties are statistical and systematic, respectively. The results are consistent with CP symmetry and, when combined with previous LHCb results, yield AΓ(K+K)=(4.4±2.3±0.6)×104 and AΓ(π+π)=(2.5±4.3±0.7)×104.
Copyright/License preprint: (License: CC-BY-4.0)
publication: © 2020-2024 CERN (License: CC-BY-4.0)



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Email contact: lhcb.secretariat@cern.ch


 記錄創建於2019-11-04,最後更新在2024-10-02


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