The 0 b → + c D− s and− b → 0 c D− s 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 b baryons relative to that of 0 b baryon are measured to be R 0 b b 0 R− b b 0 σ 0 b B 0 b → + c D− s ≡ × σ 0 b B 0 b → 0 c D− s = (15.8 ± 1.1 ± 0.6 ± 7.7)%, σ− b B− b → 0 c D− s ≡ × σ 0 b B 0 b → 0 c D− s = (16.9 ± 1.3 ± 0.9 ± 4.3)%, where the first uncertainties are statistical, the second sys- tematic, and the third due to the uncertainties on the decay branching fractions of relevant charmed baryons. The masses of 0 b and− b baryons are measured to be m 0 = 5791.12± b 0.60 ± 0.45 ± 0.24 MeV/c2 and m− = 5797.02 ± 0.63 ± b 0.49 ± 0.29 MeV/c2, where the uncertainties are statistical, systematic, and those due to charmed-hadron masses, respec- tively.

Observation of $${{\varXi } ^0_{b}} \rightarrow {{\varXi } ^+_{c}} {{D} ^-_{s}} $$ and $${{\varXi } ^-_{b}} \rightarrow {{\varXi } ^0_{c}} {{D} ^-_{s}} $$ decays / Null, N., Aaij, R., Abdelmotteleb, A.S.W., Beteta, C.A., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Adlarson, P., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., et al.. - In: EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6052. - 84:3(2024). [10.1140/epjc/s10052-024-12443-z]

Observation of $${{\varXi } ^0_{b}} \rightarrow {{\varXi } ^+_{c}} {{D} ^-_{s}} $$ and $${{\varXi } ^-_{b}} \rightarrow {{\varXi } ^0_{c}} {{D} ^-_{s}} $$ decays

Casse, G.;Sarti, A.;
2024

Abstract

The 0 b → + c D− s and− b → 0 c D− s 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 b baryons relative to that of 0 b baryon are measured to be R 0 b b 0 R− b b 0 σ 0 b B 0 b → + c D− s ≡ × σ 0 b B 0 b → 0 c D− s = (15.8 ± 1.1 ± 0.6 ± 7.7)%, σ− b B− b → 0 c D− s ≡ × σ 0 b B 0 b → 0 c D− s = (16.9 ± 1.3 ± 0.9 ± 4.3)%, where the first uncertainties are statistical, the second sys- tematic, and the third due to the uncertainties on the decay branching fractions of relevant charmed baryons. The masses of 0 b and− b baryons are measured to be m 0 = 5791.12± b 0.60 ± 0.45 ± 0.24 MeV/c2 and m− = 5797.02 ± 0.63 ± b 0.49 ± 0.29 MeV/c2, where the uncertainties are statistical, systematic, and those due to charmed-hadron masses, respec- tively.
2024
Hadron-Hadron Scattering, Particle and Resonance Production, Quarkonium, Relativistic Heavy Ion Physics
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of $${{\varXi } ^0_{b}} \rightarrow {{\varXi } ^+_{c}} {{D} ^-_{s}} $$ and $${{\varXi } ^-_{b}} \rightarrow {{\varXi } ^0_{c}} {{D} ^-_{s}} $$ decays / Null, N., Aaij, R., Abdelmotteleb, A.S.W., Beteta, C.A., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Adlarson, P., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., et al.. - In: EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6052. - 84:3(2024). [10.1140/epjc/s10052-024-12443-z]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1720414
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