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2026
article
Measurement of the branching fraction of the $$ {\Lambda}_b^0\to J/\psi \Lambda $$ decay and isospin asymmetry of B → J/ψK decays
R. Aaij, A. S. W. Abdelmotteleb, Carlos Abellán Beteta, C. Abellán Beteta, T. Ackernley, A. A. Adefisoye, B. Adeva, M. Adinolfi, P. Adlarson, C. Agapopoulou, C. Aidala, Z. Ajaltouni, S. Akar, K. Carvalho Akiba, Muzammil Akthar, P. Albicocco, J. Albrecht, R. Aleksiejūnas, F. Alessio, P. Álvarez Cartelle, R. Amalric, S. Amato, J. L. Amey, Y. Amhis, L. An, L. Anderlini, M. Andersson, P. Andreola, M. Andreotti, Sergio Andres Estrada, Alessia Anelli, Dong Ao, C. Arata, F. Archilli, Zaratsyan Areg, Matteo Argenton, S. Arguedas Cuendis, Lisa Arnone, A. Artamonov, M. Artuso, E. Aslanides, R. Ataíde Da Silva, M. Atzeni, B. Audurier, Juliette Authier, D. Bacher, Irene Bachiller Perea, S. Bachmann, Marie Bachmayer, J. J. Back, P. Baladrón Rodríguez, V. Balagura, A Balboni, W. Baldini, Z. Baldwin, Luca Balzani, H. Bao, J. Baptista de Souza Leite, C. Barbero Pretel, M. Barbetti, I. R. Barbosa, R. J. Barlow, Mikhail Barnyakov, S. Barsuk, W. Barter, Justin Bartz, B. Batsukh, B. Batsukh, Piera Battista, A. Bay, A. Beck, M. Becker, F. Bedeschi, I. Bediaga, Noah Albin Behling, S. Belin, Alberto Bellavista, K. Belous, I. Belov, I. Belyaev, G. Benane, G. Bencivenni, E. Ben-Haim, A. Berezhnoy, R. Bernet, Sergi Bernet Andres, A. Bertolin, C. Betancourt, F. Betti, J. Bex, Ia. Bezshyiko, O. Bezshyyko, J. Bhom, M. S. Bieker, N. V. Biesuz, A. Biolchini, M. Birch, F. C. R. Bishop, A. Bitadze, A. Bizzeti, T. Blake, F. Blanc, Jonah Evan Blank, S. Blusk, Vladimir Bocharnikov, J. A. Boelhauve, O. Boente García, T. Boettcher, A. Bohare, A. S. Boldyrev, C. S. Bolognani, R. Bolzonella, Riccardo Bonacci, N. Bondar, Aleksandar Bordelius, F. Borgato, S. Borghi, M. Borsato, J. T. Borsuk, E. Bottalico, S. A. Bouchiba, Marcelo Bovill, T. J. V. Bowcock, A. Boyer, C. Bozzi, J. D. Brandenburg, A. Brea Rodríguez, N. Breer, J. Brodzicka, A. Brossa Gonzalo, J. Brown, D. Brundu, E. Buchanan, Marta Burgos Marcos, A. T. Burke, C. Burr, Clarissa Buti, J. S. Butter, J. Buytaert, W. Byczynski, S. Cadeddu, Hao Cai, Yuman Cai, Alois Caillet, R. Calabrese, S. Calderon Ramirez, Lukas Calefice, M. Calvi, Miriam Calvo Gomez, P. Camargo Magalhaes, J. I. Cambon Bouzas, P. Campana, D. H. Cámpora Pérez, A. Campoverde, S. Capelli, M. Caporale, L. Capriotti, R. Caravaca-Mora, A. Carbone, L. Carcedo Salgado, R. Cardinale, A. Cardini, T. Carli, P. Carniti, L. Carus, A. Casais Vidal, R. Caspary, G. Casse, M. Cattaneo, G. Cavallero, V. Cavallini, S. Celani, Irene Celestino, S. Cesare, A. J. Chadwick, Ibrahim Chahrour, H. Chang, M. Charles, Ph. Charpentier, Ph. Charpentier, R. Cheaib, M. Chefdeville, 陈晨, Jou-An Chen, S. Chen, Zewen Chen, M. Cherif, A. Chernov, S. Chernyshenko, Xenofon Chiotopoulos, V. Chobanova, M. Chrząszcz, A. Chubykin, V. Chulikov, P. Ciambrone, X. Cid Vidal, G. Ciezarek, P. Cifra, P. E. L. Clarke, M. Clemencic, H. V. Cliff, J. Closier, C. Cocha Toapaxi, V. Coco, J. Cogan, E. Cogneras, L. Cojocariu, S. Collaviti, P. Collins, T. Colombo, M. Colonna, A. Comerma-Montells, L. Congedo, James Connaughton, A. Contu, N. Cooke, Giulio Cordova, Christian Andres Coronel, I. Corredoira, Anthony Correia, G. Corti, J. J. Cottee Meldrum, B. Couturier, D. C. Craik, M. Cruz Torres, Esteban Currás Rivera, R. Currie, C. L. Da Silva, S. Dadabaev, L. Dai, X. Dai, E. Dall’Occo, J. Dalseno, C. D’Ambrosio, J. Daniel, P. d’Argent, G. Darze, Alexander Davidson, J. E. Davies, O. De Aguiar Francisco, Camilla de Angelis, Federico de Benedetti, J. de Boer, K. De Bruyn, S. De Capua, Michel de Cian, U. De Freitas Carneiro Da Graca, Sietske de Keijzer, E. De Lucia, J. M. De Miranda, L. De Paula, M. De Serio, P. De Simone, Fabio de Vellis, J. A. de Vries, F. Debernardis, D. Décamp, V. Dedu, Sam Michael Dekkers, L. Del Buono, B. Delaney, H.-P. Dembinski, J. Deng, V. Denysenko, O. Deschamps, F. Dettori, B. Dey, P. Di Nezza, I. Diachkov, S. Didenko, S. Ding, Yiyang Ding, Y. Ding, Vasyl Dobishuk, A. D. Docheva, Alex Patrick Doheny, C. Dong, A. M. Donohoe, C. Dionisi, A. C. dos Reis, A. D. Dowling, Lea Marie Sophie Dreyfus, W. Duan, P. Duda, L. Dufour, V. Duk, P. Durante, M. M. Duras, J. M. Durham, Ozgur Durmus, A. Dziurda, A. Dzyuba, S. Easo, Ellinor Eckstein, U. Egede, A. Egorychev, V. Egorychev, S. Eisenhardt, E. Ejopu, L. Eklund, Mohamed Elashri, J. Ellbracht, S. Ely, A. Ene, Jonas Nathanael Eschle, S. Esen, T. Evans, F. Fabiano, Saba Faghih, L. N. Falcao, B. Fang, R. Fantechi, L. Fantini, M. Faria, Karen Farmer, D. Fazzini, D. Fazzini, Mingjie Feng, M. Féo, Álvaro Fernández Casaní, Miguel Fernandez Gomez, Alex Daniel Fernez, F. Ferrari, F. Ferreira Rodrigues, S. Ferreres Sole, M. Ferrillo, M. Ferro-Luzzi, S. Filippov, R. A. Fini, M. Fiorini, M. Firlej, K. Fischer, D. S. Fitzgerald, C. Fitzpatrick, T. Fiutowski, F. Fleuret, F. Fleuret, M. Fontana, M. Fontana, R. Forty, D. Foulds-Holt, V. Franco Lima, M. Franco Sevilla, M. Frank, E. Franzoso, G. Frau, C. Frei, D. A. Friday, J. Fu, Quentin Fuehring, T. Fulghesu, G. Galati, M. D. Galati, A. Gallas Torreira, D. Galli, S. Gambetta, M. Gandelman, P. Gandini, Bilal Ahmad Ganie, H. Gao, R. Gao, Tian-Qi Gao, Yang Gao, Y. Gao, Yuxi Gao, L. M. Garcia Martin, P. Garcia Moreno, J. García Pardiñas, P. Gardner, Kunal Garg, L. Garrido, C. Gaspar, C. Gaspar, Louis Lenard Gerken, E. Gersabeck, M. Gersabeck, T. Gershon, T. J. Gershon, Z. Ghorbanimoghaddam, F. I. Giasemis, V. Gibson, H. K. Giemza, A. Gilman, M. Giovannetti, A. Gioventù, Lucas George Girardey, M. A. Giza, F. C. Glaser, V. V. Gligorov, C. Göbel, L. Golinka-Bezshyyko, E. Golobardes, D. Golubkov, A. Golutvin, S. Gomez Fernandez, Wojciech Gomułka, Isadora Gonçales Vaz, F. Goncalves Abrantes, M. Goncerz, G. Gong, J. A. Gooding, I. Gorelov, C. Gotti, Ekaterina Govorkova, J. P. Grabowski, L. A. Granado Cardoso, E. Graugés, E. Graverini, L. Grazette, G. Graziani, A. Grecu, L. M. Greeven, N. A. Grieser, L. Grillo, S. Gromov, C. Gu, M. Guarise, M. Guarise, V. Guliaeva, P. A. Günther, A.-K. Guseinov, E. Gushchin, Yu. 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Madurai, Daniel Magdalinski, D. Maisuzenko, J. J. Malczewski, S. Malde, L. Malentacca, A. Malinin, T. Maltsev, G. Manca, G. Mancinelli, C. Mancuso, R. Manera Escalero, Federico Manganella, Daniele Manuzzi, D. Marangotto, J. F. Marchand, R. Marchevski, U. Marconi, Edoardo Mariani, S. Mariani, C. Marín Benito, J. Marks, Phillip John Marshall, L. Martel, G. Martelli, G. Martellotti, L. Martinazzoli, M. Martinelli, Daniel Guillermo Martinez Gomez, D. Martínez Santos, F. Martínez-Vidal, Alexia Martorell Granollers, A. Massafferri, R. Matev, A. Mathad, V. Matiunin, C. Matteuzzi, K. R. Mattioli, A. Mauri, E. Maurice, J. Mauricio, Pierre Paul Louis Mayencourt, J. Mazorra de Cos, M. Mazurek, M. McCann, T. H. McGrath, N. T. McHugh, A. McNab, R. McNulty, B. Meadows, G. Meier, D. Melnychuk, D. Mendoza Granada, P. Rodriguez Perez, F. M. Meng, M. Merk, A. Merli, L. Meyer Garcia, D. Miao, H. Miao, M. Mikhasenko, D. A. Milanes, A. Minotti, E. Minucci, T. Miralles, B. Mitreska, D. S. Mitzel, R. 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Zhukov, Jiahui Zhuo, Quan Zou, D. Zuliani, Gianluca Zunica
1Citations signalées — pas une note de qualité
128Institutions déclarées
25Pays d’affiliation déclarés
Résumé fourni par la source
A bstract This paper describes a measurement of the $$ {\Lambda}_b^0\to J/\psi \Lambda $$ Λ b 0 → J / ψ Λ 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 $$ {B}^0\to J/\psi {K}_{\textrm{S}}^0 $$ B 0 → J / ψ K S 0 decays, $$ \frac{\mathcal{B}\left({\Lambda}_b^0\to J/\psi \Lambda \right)}{\mathcal{B}\left({B}^0\to J/\psi {K}_{\textrm{S}}^0\right)}=0.750\pm 0.005\pm 0.022\pm 0.005\pm 0.062, $$ B Λ b 0 → J / ψ Λ B B 0 → J / ψ K S 0 = 0.750 ± 0.005 ± 0.022 ± 0.005 ± 0.062 , yielding $$ \mathcal{B}\left({\Lambda}_b^0\to J/\psi \Lambda \right)=\left(3.34\pm 0.02\pm 0.10\pm 0.08\pm 0.28\right)\times {10}^{-4} $$ B Λ b 0 → J / ψ Λ = 3.34 ± 0.02 ± 0.10 ± 0.08 ± 0.28 × 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 $$ {\Lambda}_b^0 $$ Λ b 0 baryon and B 0 meson hadronisation fractions. In addition, the isospin asymmetry between the rates of $$ {B}^0\to J/\psi {K}_{\textrm{S}}^0 $$ B 0 → J / ψ K S 0 and B + → J/ψK + decays is measured to be $$ {A}_{\
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Measurement of the branching fraction of the $$ {\Lambda}_b^0\to J/\psi \Lambda $$ decay and isospin asymmetry of B → J/ψK decays
- Date Crossref
- 26/01/2026
- Éditeur
- Springer Science and Business Media LLC
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude et ne compte pas comme une seconde source scientifique indépendante.
Institutions déclarées
National Institute for Subatomic PhysicsUniversity of WarwickUniversity of ZurichUniversity of LiverpoolSyracuse UniversityUniversidade de Santiago de CompostelaUniversity of BristolUppsala UniversityCentre National de la Recherche ScientifiqueUniversité Paris-SaclayInstitut National de Physique Nucléaire et de Physique des ParticulesLaboratoire de Physique des 2 Infinis Irène Joliot-CurieUniversity of MichiganUniversité Clermont AuvergneLaboratoire de Physique de Clermont AuvergneJagiellonian UniversityAGH University of KrakowIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiTU Dortmund UniversityMachine Intelligence Research InstituteLamarr Institute for Machine Learning and Artificial IntelligenceVilnius UniversityEuropean Organization for Nuclear ResearchUniversity of CambridgeDélégation Paris 7Université Paris CitéSorbonne UniversitéSorbonne Paris CitéLaboratoire de Physique Nucléaire et de Hautes ÉnergiesUniversidade Federal do Rio de JaneiroPeking UniversityIstituto Nazionale di Fisica Nucleare, Sezione di FirenzeIstituto Nazionale di Fisica Nucleare, Sezione di FerraraUniversidade da CoruñaIstituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaUniversity of Milano-BicoccaUniversity of Chinese Academy of SciencesCommissariat à l'Énergie Atomique et aux Énergies AlternativesCEA Paris-Saclay - Etablissement de SaclayCEA Paris-SaclayInstitut de Recherche sur les Lois Fondamentales de l'UniversUniversity of Rome Tor VergataIstituto Nazionale di Fisica Nucleare, Roma Tor VergataConsejo Nacional de RectoresAix-Marseille UniversitéCentre de physique des particules de MarseilleFZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicÉcole Polytechnique Fédérale de LausanneMassachusetts Institute of TechnologyÉcole PolytechniqueLaboratoire Leprince-RinguetUniversity of OxfordHeidelberg UniversityRuhr University BochumCentro Brasileiro de Pesquisas FísicasPontifícia Universidade Católica do Rio de JaneiroUniversity of ManchesterIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of EdinburghIstituto Nazionale di Fisica Nucleare, Sezione di PisaIstituto Nazionale di Fisica Nucleare, Sezione di GenovaIstituto Nazionale di Fisica Nucleare, Sezione di Roma IUniversitat Ramon LlullIstituto Nazionale di Fisica Nucleare, Sezione di PadovaTaras Shevchenko National University of KyivInstitute of Nuclear Physics, Polish Academy of SciencesUniversity of BonnImperial College LondonLaboratoire d’Annecy de Physique des ParticulesUniversité Savoie Mont BlancUniversity of Modena and Reggio EmiliaUniversity of VictoriaLos Alamos National LaboratoryMaastricht UniversityUniversity of FerraraAustralian Regenerative Medicine InstituteMonash UniversityCracow University of TechnologyThe Ohio State UniversityIstituto Nazionale di Fisica Nucleare, Sezione di CagliariWuhan UniversityUniversitat de BarcelonaUniversidade Estadual de Campinas (UNICAMP)University of BolognaUniversity of GenoaScuola Normale SuperioreUniversity of MilanIstituto Nazionale di Fisica Nucleare, Sezione di MilanoTsinghua UniversityEötvös Loránd UniversityHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringIstituto Nazionale di Fisica Nucleare, Sezione di BariUniversity of GlasgowUniversity of CincinnatiNational Autonomous University of HondurasHunan UniversityUniversity of CagliariUniversity of GroningenFederal Center for Technological Education Celso Suckow da FonsecaUniversity of Bari Aldo MoroCentral China Normal UniversityUniversity College DublinSouth China Normal UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaRutherford Appleton LaboratoryUniversity of PerugiaUniversitat de ValènciaInstituto de Física CorpuscularUniversity of Maryland, College ParkKharkiv Institute of Physics and TechnologyUniversity of FreiburgLIP6University of PisaUniversity College of Applied ScienceRWTH Aachen UniversityUniversidad Nacional de ColombiaUniversity of BirminghamHenan Normal UniversityLanzhou UniversityUniversity of PaduaUniversity of BergamoUniversidad de Ingeniería y TecnologíaUniversity of SienaUniversity of BasilicataMax Planck Institute for Nuclear PhysicsUniversidad de AlcaláUniversity of UrbinoUniversidad Andrés Bello Une affiliation ne permet pas de déduire la nationalité d’un auteur.
Sujets associés
Particle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsMedical Imaging Techniques and Applications