The Ξb0 → Ξc+ Ds− and Ξb− → Ξc0 Ds− decays are observed for the first time using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of √s = 13 TeV, corresponding to an integrated luminosity of 5.1 fb^−1. The branching fractions times the production cross-sections of Ξb baryons relative to that of Λb0 baryon are measured to be R(Ξb0/Λb0) ≡ σ(Ξb0)/σ(Λb0) × B(Ξb0 → Ξc+ Ds−)/B(Λb0 → Λc0 Ds−) = (15.8 ± 1.1 ± 0.6 ± 7.7)%, R(Ξb−/Λb0) ≡ σ(Ξb−)/σ(Λb0) × B(Ξb− → Ξc0 Ds−)/B(Λb0 → Λc0 Ds−) = (16.9 ± 1.3 ± 0.9 ± 4.3)%, where the first uncertainties are statistical, the second systematic, and the third due to the uncertainties on the branching fractions of relevant charmed baryons. The masses of Ξb0 and Ξb− baryons are measured to be m_Ξb0 = 5791.12 ± 0.60 ± 0.45 ± 0.24 MeV/c^2 and m_Ξb− = 5797.02 ± 0.63 ± 0.49 ± 0.29 MeV/c^2, where the uncertainties are statistical, systematic, and those due to charmed-hadron masses, respectively.

Aaij, R., Abdelmotteleb, A.S.W., Beteta, C.A., Abudinén, F., Ackernley, T., Adeva, B., et al. (2024). Observation of Ξb0 → Ξc+ Ds− and Ξb− → Ξc0 Ds− decays. EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(3), 1-17 [10.1140/epjc/s10052-024-12443-z].

Observation of Ξb0 → Ξc+ Ds− and Ξb− → Ξc0 Ds− decays

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;
2024

Abstract

The Ξb0 → Ξc+ Ds− and Ξb− → Ξc0 Ds− decays are observed for the first time using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of √s = 13 TeV, corresponding to an integrated luminosity of 5.1 fb^−1. The branching fractions times the production cross-sections of Ξb baryons relative to that of Λb0 baryon are measured to be R(Ξb0/Λb0) ≡ σ(Ξb0)/σ(Λb0) × B(Ξb0 → Ξc+ Ds−)/B(Λb0 → Λc0 Ds−) = (15.8 ± 1.1 ± 0.6 ± 7.7)%, R(Ξb−/Λb0) ≡ σ(Ξb−)/σ(Λb0) × B(Ξb− → Ξc0 Ds−)/B(Λb0 → Λc0 Ds−) = (16.9 ± 1.3 ± 0.9 ± 4.3)%, where the first uncertainties are statistical, the second systematic, and the third due to the uncertainties on the branching fractions of relevant charmed baryons. The masses of Ξb0 and Ξb− baryons are measured to be m_Ξb0 = 5791.12 ± 0.60 ± 0.45 ± 0.24 MeV/c^2 and m_Ξb− = 5797.02 ± 0.63 ± 0.49 ± 0.29 MeV/c^2, where the uncertainties are statistical, systematic, and those due to charmed-hadron masses, respectively.
2024
Aaij, R., Abdelmotteleb, A.S.W., Beteta, C.A., Abudinén, F., Ackernley, T., Adeva, B., et al. (2024). Observation of Ξb0 → Ξc+ Ds− and Ξb− → Ξc0 Ds− decays. EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(3), 1-17 [10.1140/epjc/s10052-024-12443-z].
Aaij, R.; Abdelmotteleb, A. S. W.; Beteta, C. Abellan; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1005509
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