Measurement of the branching fraction of the Λ0 b → J/ψΛ decay and isospin asymmetry of B → J/ψK decays
| Title: | Measurement of the branching fraction of the Λ0 b → J/ψΛ decay and isospin asymmetry of B → J/ψK decays |
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| Authors: | Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinen, F.; Ackernley, T.; Adefisoye, A. A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapopoulou, C.; Aidala, C. A.; Ajaltouni, Z.; Akar, S.; Akiba, K.; Akthar, M.; Albicocco, P.; Albrecht, J.; Aleksiejunas, R.; Alessio, F.; Alvarez Cartelle, P.; Amalric, R.; Amato, S.; Amey, J. L.; Amhis, Y.; An, L.; Anderlini, L.; Andersson, M.; Andreola, P.; Andreotti, M.; Andres Estrada, S.; Anelli, A.; Ao, D.; Arata, C.; Archilli, F.; Areg, Z.; Argenton, M.; Arguedas Cuendis, S.; Arnone, L.; Bolognani, C. S.; Burgos Marcos, M.; Campora Perez, D. H.; Chiotopoulos, X.; de Vries, J. A.; Merk, M.; Nicotra, D.; Onderwater, C. J. G.; Pawley, C. J.; Ruiz Vidal, J.; Scriven, G.; Vos, K. |
| Source: | Aaij, R, Abdelmotteleb, A S W, Abellan Beteta, C, Abudinen, F, Ackernley, T, Adefisoye, A A, Adeva, B, Adinolfi, M, Adlarson, P, Agapopoulou, C, Aidala, C A, Ajaltouni, Z, Akar, S, Akiba, K, Akthar, M, Albicocco, P, Albrecht, J, Aleksiejunas, R, Alessio, F, Alvarez Cartelle, P, Amalric, R, Amato, S, Amey, J L, Amhis, Y, An, L, Anderlini, L, Andersson, M, Andreola, P, Andreotti, M, Andres Estrada, S, Anelli, A, Ao, D, Arata, C, Archilli, F, Areg, Z, Argenton, M, Arguedas Cuendis, S, Arnone, L, LHCb collaboration, Bolognani, C S, Burgos Marcos, M, Campora Perez, D H, Chiotopoulos, X, .... |
| Publication Year: | 2026 |
| Collection: | Maastricht University Research Publications |
| Subject Terms: | B Physics; Branching fraction; Flavour Physics; Hadron-Hadron Scattering |
| Description: | This paper describes a measurement of the Lambda(0)(b) -> J/psi Lambda branching fraction using data collected with the LHCb experiment in proton-proton collisions from 2016 to 2018. The dataset corresponds to an integrated luminosity of 5.4 fb(-1). The branching fraction is determined relative to that of B-0 -> J/psi K-S(0) decays,B(Lambda(0)(b) -> J/psi Lambda)/(B-0 -> J/psi K-S(0)) = 0.750 +/- 0.005 +/- 0.022 +/- 0.005 +/- 0.062,yielding B(Lambda(0)(b) -> J/psi Lambda) = (3.34 +/- 0.02 +/- 0.10 +/- 0.08 +/- 0.28) x 10(-4), where the first uncertainty is statistical, the second systematic, the third due to external inputs on branching fractions and the fourth due to the ratio of Lambda(0)(b) baryon and B-0 meson hadronisation fractions. In addition, the isospin asymmetry between the rates of B-0 -> J/psi K-S(0) and B+ -> J/psi K+ decays is measured to beA(I) = -0.0135 +/- 0.0004 +/- 0.0133, where the first uncertainty is statistical and the second systematic. |
| Document Type: | article in journal/newspaper |
| Language: | English |
| ISSN: | 1029-8479 |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/001679516500001; info:eu-repo/semantics/altIdentifier/pissn/1029-8479 |
| DOI: | 10.1007/JHEP01(2026)159 |
| Availability: | https://cris.maastrichtuniversity.nl/en/publications/c17af4f3-1fa4-4a39-8806-2f89b38dacf2; https://doi.org/10.1007/JHEP01(2026)159 |
| Rights: | info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/4.0/ |
| Accession Number: | edsbas.EE809BBA |
| Database: | BASE |