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Article
Report number arXiv:2105.09889 ; LHCb-PAPER-2020-045 ; CERN-EP-2021-060 ; LHCB-PAPER-2020-045
Title Search for time-dependent CP violation in D0K+K and D0π+π decays
Author(s) LHCb Collaboration  Mostrar todos los 963 autores
Corporate Author(s) LHCb Collaboration
Publication 2021-10-01
Imprint 21 May 2021
Number of pages 39
Note Updated to match published version; all figures and tables, along with supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-045.html
In: Phys. Rev. D 104 (2021) 072010
DOI 10.1103/PhysRevD.104.072010 (publication)
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; charm physics ; CP violation ; oscillation
Abstract A search for time-dependent violation of the charge-parity symmetry in D0K+K and D0π+π decays is performed at the LHCb experiment using proton-proton collision data recorded from 2015 to 2018 at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb1. The D0 meson is required to originate from a D(2010)+D0π+ decay, such that its flavour at production is identified by the charge of the accompanying pion. The slope of the time-dependent asymmetry of the decay rates of D0 and D¯0 mesons into the final states under consideration is measured to be ΔYK+K=(2.3±1.5±0.3)×104, ΔYπ+π=(4.0±2.8±0.4)×104, where the first uncertainties are statistical and the second are systematic. These results are compatible with the conservation of the charge-parity symmetry at the level of 2 standard deviations and improve the precision by nearly a factor of two.
Copyright/License publication: © 2021-2024 CERN (License: CC BY 4.0)
preprint: © 2021-2024 CERN (License: CC-BY-4.0)



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