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Article
Report number arXiv:2109.01334 ; LHCb-PAPER-2021-021 ; CERN-EP-2021-167 ; LHCB-PAPER-2021-021
Title Measurement of the lifetimes of promptly produced Ωc0 and Ξc0 baryons
Related titleMeasurement of the lifetimes of promptly produced Ωc0 and Ξc0 baryons
Author(s) LHCb Collaboration  Mostrar todos os 1002 autores
Publication 2022-03-15
Imprint 03 Sep 2021
Number of pages 9
Note All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2021-021.html (LHCb public pages)
In: Sci. Bull. 67 (2022) 479-487
DOI 10.1016/j.scib.2021.11.022 (publication)
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords electroweak interaction ; flavor physics ; charm physics
Abstract A measurement of the lifetimes of the Ωc0 and Ξc0 baryons is reported using proton--proton collision data at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb1 collected by the LHCb experiment. The Ωc0 and Ξc0 baryons are produced directly from proton interactions and reconstructed in the pKKπ+ final state. The Ωc0 lifetime is measured to be 276.5±13.4±4.4±0.7 fs, and the Ξc0 lifetime is measured to be 148.0±2.3±2.2±0.2 fs, where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the D0 lifetime. These results confirm previous LHCb measurements based on semileptonic beauty-hadron decays, which disagree with earlier results of a four times shorter Ωc0 lifetime, and provide the single most precise measurement of the Ωc0 lifetime.
Copyright/License publication: © 2021-2024 Science China Press (License: CC-BY-4.0)
preprint: © 2021-2024 CERN (License: CC-BY-4.0)



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 Record created 2021-09-03, last modified 2024-12-02


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