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Measurement of the lifetimes of promptly produced Ωc0 and Ξc0 baryons

LHCb Collaboration, et al. (2022) Measurement of the lifetimes of promptly produced Ωc0 and Ξc0 baryons. Science Bulletin, 67(5), pp. 479-487. (doi: 10.1016/j.scib.2021.11.022)

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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 13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected by the LHCb experiment. The Ωc0 and Ξc0 baryons are produced directly from proton interactions and reconstructed in the pK-K-π+ final state. The Ωc0 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 Ωc0 lifetime, and provide the single most precise measurement of the Ωc0 lifetime.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Alexander, Dr Michael and Schiller, Dr Manuel and Coombs, George and Spradlin, Dr Patrick and McHugh, Niall and Douglas, Lauren and Seman Bobulska, Dana and Soler, Professor Paul and Friday, David and Petric, Dr Marko and Eklund, Prof Lars and Longstaff, Iain Richard
Authors: LHCb Collaboration, , Alexander, M., Bobulska, D., Coombs, G., Douglas, L., Eklund, L., Friday, D.A., Longstaff, I., Mchugh, N.T., Petric, M., Schiller, M., Soler, F.J.P., and Spradlin, P.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Science Bulletin
Publisher:Elsevier
ISSN:2095-9273
ISSN (Online):2095-9281
Published Online:01 December 2021
Copyright Holders:Copyright © 2021 Science China Press
First Published:First published in Science Bulletin 67(5): 479-487
Publisher Policy:Reproduced under a Creative Commons License

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