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 p K− 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.

Aaij, R., Abdelmotteleb, A., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2022). Measurement of the Lifetimes of Promptly Produced Ω0c and Ξ0c Baryons. SCIENCE BULLETIN, 67(5), 479-487 [10.1016/j.scib.2021.11.022].

Measurement of the Lifetimes of Promptly Produced Ω0c and Ξ0c Baryons

Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Villa, A.;Zucchelli, S.;
2022

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 p K− 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.
2022
Aaij, R., Abdelmotteleb, A., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2022). Measurement of the Lifetimes of Promptly Produced Ω0c and Ξ0c Baryons. SCIENCE BULLETIN, 67(5), 479-487 [10.1016/j.scib.2021.11.022].
Aaij, R.; Abdelmotteleb, A.S.W.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C.A.; Aiola, S.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/899047
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