Abstract
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 13 TeV, corresponding to an integrated luminosity of 5.4 fb−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±0.7 fs, and the Ξ0c 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 Ω0c lifetime, and provide the single most precise measurement of the Ω0c lifetime.
Original language | English |
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Pages (from-to) | 479-487 |
Number of pages | 9 |
Journal | Science Bulletin |
Volume | 67 |
Issue number | 5 |
Early online date | 1 Dec 2021 |
DOIs | |
Publication status | Published - 15 Mar 2022 |
Keywords
- Charm physics
- Charmed baryon
- Flavour physics
- LHCb
- Lifetime
- QCD