Observation of the Λb0→J/ψΞ-K+ and Ξb0→J/ψΞ-π+ decays.
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| Title: | Observation of the Λb0→J/ψΞ-K+ and Ξb0→J/ψΞ-π+ decays. |
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| Authors: | LHCb Collaboration (AUTHOR), Aaij, R.1 (AUTHOR), Abdelmotteleb, A. S. W.2 (AUTHOR), Beteta, C. Abellan3 (AUTHOR), Abudinén, F.2 (AUTHOR), Ackernley, T.4 (AUTHOR), Adefisoye, A. A.5 (AUTHOR), Adeva, B.6 (AUTHOR), Adinolfi, M.7 (AUTHOR), Adlarson, P.8 (AUTHOR), Agapopoulou, C.9 (AUTHOR), Aidala, C. A.10 (AUTHOR), Ajaltouni, Z.11 (AUTHOR), Akar, S.12 (AUTHOR), Akiba, K.1 (AUTHOR), Albicocco, P.13 (AUTHOR), Albrecht, J.14,15 (AUTHOR), Alessio, F.16 (AUTHOR), Alexander, M.17 (AUTHOR), Aliouche, Z.18 (AUTHOR) |
| Source: | European Physical Journal C -- Particles & Fields. Jul2025, Vol. 85 Issue 7, p1-15. 15p. |
| Subjects: | Branching ratios, Large Hadron Collider, Particle physics, Baryons, Radioactive decay, Proton-proton interactions, Vector mesons |
| Abstract: | The first observation of the Ξ b 0 → J / ψ Ξ - π + decay and the most precise measurement of the branching fraction of the Λ b 0 → J / ψ Ξ - K + decay are reported, using proton-proton collision data from the LHCb experiment collected in 2016–2018 at a centre-of-mass energy of 13 \,Te V , corresponding to an integrated luminosity of 5.4 \,fb - 1 . Using the Λ b 0 → J / ψ Λ and Ξ b - → J / ψ Ξ - decays as normalisation channels, the ratios of branching fractions are measured to be B ( Λ b 0 → J / ψ Ξ - K +) B ( Λ b 0 → J / ψ Λ) = (1.17 ± 0.14 ± 0.08) × 10 - 2 , B ( Ξ b 0 → J / ψ Ξ - π +) B ( Ξ b - → J / ψ Ξ -) = (11.9 ± 1.4 ± 0.6) × 10 - 2 , where the first uncertainty is statistical and the second systematic. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The first observation of the Ξ b 0 → J / ψ Ξ - π + decay and the most precise measurement of the branching fraction of the Λ b 0 → J / ψ Ξ - K + decay are reported, using proton-proton collision data from the LHCb experiment collected in 2016–2018 at a centre-of-mass energy of 13 \,Te V , corresponding to an integrated luminosity of 5.4 \,fb - 1 . Using the Λ b 0 → J / ψ Λ and Ξ b - → J / ψ Ξ - decays as normalisation channels, the ratios of branching fractions are measured to be B ( Λ b 0 → J / ψ Ξ - K +) B ( Λ b 0 → J / ψ Λ) = (1.17 ± 0.14 ± 0.08) × 10 - 2 , B ( Ξ b 0 → J / ψ Ξ - π +) B ( Ξ b - → J / ψ Ξ -) = (11.9 ± 1.4 ± 0.6) × 10 - 2 , where the first uncertainty is statistical and the second systematic. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 14346044 |
| DOI: | 10.1140/epjc/s10052-025-14129-6 |
