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Measurement of the lifetimes of promptly produced Ω0c and Ξ0c baryons

A measurement of the lifetimes of the Ω0c and Ξ0c baryons is reported using proton-proton collision data at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected by the LHCb experiment. The Ω0c and Ξ0c baryons are produced directly from proton interactions...

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Main Authors: Aaij, Roel (Author) , Archilli, Flavio (Author) , Bachmann, Sebastian (Author) , Berninghoff, Daniel (Author) , Borsato, Martino (Author) , Frau, Giulia (Author) , Gerick, David (Author) , Grabowski, Jascha (Author) , Günther, Paul André (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Hu, Jiangqiao (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Li, Peilian (Author) , Malygina, Hanna (Author) , Marks, Jörg (Author) , Unverzagt, Daniel Joachim (Author) , Uwer, Ulrich (Author) , Wang, Chishuai (Author) , Witola, Lukas (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 2022
In: Science bulletin
Year: 2022, Volume: 67, Issue: 5, Pages: 479-487
ISSN:2095-9281
DOI:10.1016/j.scib.2021.11.022
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.scib.2021.11.022
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S2095927321007301
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Author Notes:LHCb Collaboration
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Summary:A measurement of the lifetimes of the Ω0c and Ξ0c baryons is reported using proton-proton collision data at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected by the LHCb experiment. The Ω0c and Ξ0c baryons are produced directly from proton interactions and reconstructed in the pK-K-π+ final state. The Ω0c lifetime is measured to be 276.5±13.4±4.4±0.7fs, and the Ξc0 lifetime is measured to be 148.0±2.3±2.2±0.2fs, 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 Ω0c lifetime, and provide the single most precise measurement of the Ω0c lifetime.
Item Description:LHCb Collaboration: R. Aaij, F. Archilli, S. Bachmann, D. Berninghoff, M. Borsato, G. Frau, D. Gerick, J.P. Grabowski, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, R. Kopecna, B. Leverington, P. Li, H. Malygina, J. Marks, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, A. Zhelezov [und viele weitere]
Im Text ist "0" jeweils hochgestellt, "c" jeweils tiefgestellt
Available online 1 December 2021
Gesehen am 20.07.2022
Physical Description:Online Resource
ISSN:2095-9281
DOI:10.1016/j.scib.2021.11.022

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