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Preprint
Report number arXiv:2412.13958 ; LHCb-PAPER-2024-048 ; CERN-EP-2024-330 ; LHCB-PAPER-2024-048
Title Measurement of CP asymmetries in Λb0ph decays
Author(s) LHCb Collaboration  顯示全部 1148 名作者
Corporate author(s) LHCb Collaboration
Publication 2024
Imprint 19 Dec 2024
Number of pages 24
Note All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://lbfence.cern.ch/alcm/public/analysis/full-details/3533/ (LHCb public pages)
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Keywords electroweak interaction ; flavor physics ; CP violation
Abstract A search for CP violation in Λb0pK and Λb0pπ decays is presented using the full Run 1 and Run 2 data samples of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 9 fb1 at center-of-mass energies of 7, 8, and 13 TeV. For the Run 2 data sample, the CP-violating asymmetries are measured to be ACPpK=(1.4±0.7±0.4)% and ACPpπ=(0.4±0.9±0.4)%, where the first uncertainty is statistical and the second is systematic. Following significant improvements in the evaluation of systematic uncertainties compared to the previous LHCb measurement, the Run 1 dataset is reanalyzed to update the corresponding results. When combining the Run 2 and updated Run 1 measurements, the final results are found to be ACPpK=(1.1±0.7±0.4)% and ACPpπ=(0.2±0.8±0.4)%, constituting the most precise measurements of these asymmetries to date.
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Copyright/License Preprint: © 2024-2025 CERN (License: CC-BY-4.0)
Submitted by lhcb.secretariat@cern.ch



 


 記錄創建於2024-12-19,最後更新在2024-12-21


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