| Title: |
Measurement of inclusive B → X u ℓ ν partial branching fractions and | V u b | at Belle II |
| Authors: |
Abumusabh, M.; Adachi, I.; Adamczyk, K.; Aggarwal, L.; Ahmed, H.; Ahn, Y.; Aihara, H.; Akopov, N.; Alghamdi, S.; Alhakami, M.; Aloisio, A.; Althubiti, N.; Amos, K.; Anh Ky, N.; Antonioli, C.; Asner, D. M.; Atmacan, H.; Aushev, T.; Ayad, R.; Babu, V.; Bae, H.; Baghel, N. K.; Bahinipati, S.; Bambade, P.; Banerjee, Sw.; Barrett, M.; Bartl, M.; Baudot, J.; Beaubien, A.; Becherer, F.; Becker, J.; Bennett, J. V.; Bernlochner, F. U.; Bertacchi, V.; Bertemes, M.; Bertholet, E.; Bessner, M.; Bettarini, S.; Bhardwaj, V.; Bhuyan, B.; Bianchi, F.; Bilka, T.; Biswas, D.; Bobrov, A.; Bodrov, D.; Bonvicini, G.; Borah, J.; Boschetti, A.; Bozek, A.; Bračko, M. |
| Contributors: |
Ministry of Education and Science; State Committee of Science; Australian Research Council; Bundesministerium für Bildung, Wissenschaft und Forschung; Austrian Science Fund; European Research Council; Natural Sciences and Engineering Research Council of Canada; Compute Canada; Canarie; National Key Research and Development Program of China; National Natural Science Foundation of China; Natural Science Foundation of Shandong Province; Grantová Agentura České Republiky; Ministerstvo Školství, Mládeže a Tělovýchovy; Univerzita Karlova v Praze; Seventh Framework Programme; HORIZON EUROPE European Research Council; HORIZON EUROPE Marie Sklodowska-Curie Actions; Institut National de Physique Nucléaire et de Physique des Particules; Centre National de la Recherche Scientifique; Agence Nationale de la Recherche; Bundesministerium für Bildung und Forschung; Deutsche Forschungsgemeinschaft; Helmholtz-Gemeinschaft; Max-Planck-Gesellschaft; Alexander von Humboldt-Stiftung; Department of Atomic Energy, Government of India; Department of Science and Technology, Ministry of Science and Technology, India; University of Petroleum and Energy Studies; Israel Science Foundation; United States-Israel Binational Science Foundation; Ministry of Science and Technology, Israel; Istituto Nazionale di Fisica Nucleare Sezione di Padova; European Commission; NextGenerationEU; Japan Society for the Promotion of Science; Ministry of Education, Culture, Sports, Science and Technology; National Research Foundation of Korea; Korea Institute of Science and Technology Information; Korea Research Environment Open Network; Universiti Malaya; Akademi Sains Malaysia; Ministry of Higher Education, Malaysia; Secretaría de Educación Pública; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional; Ministerstwo Edukacji i Nauki; Narodowe Centrum Nauki; Ministry of Science and Higher Education of the Russian Federation; National Research University Higher School of Economics; University of Tabuk; King Saud University; Javna Agencija za Raziskovalno Dejavnost RS; Ikerbasque, Basque Foundation for Science; Ministerio de Ciencia e Innovación; Agencia Estatal de Investigación; Generalitat Valenciana; Knut och Alice Wallenbergs Stiftelse; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung; National Science and Technology Council; Ministry of Education; Thailand Center of Excellence in Physics; Türkiye Bilimsel ve Teknolojik Araştırma Kurumu; National Research Foundation of Ukraine; Ministry of Education and Science of Ukraine; National Science Foundation; U.S. Department of Energy; Vietnam Academy of Science and Technology; High Energy Accelerator Research Organization; National Institute of Informatics; Brookhaven National Laboratory; Deutsches Elektronen-Synchrotron; Instituto Nazionale di Fisica Nucleare; University of Victoria; Radiation Science Research Institute; Foreign Large-Size Research Facility Application Supporting Project; GLORIAD; Frontiers of Science Program; SINET6; GridKa |
| Source: |
Physical Review D ; volume 113, issue 3 ; ISSN 2470-0010 2470-0029 |
| Publisher Information: |
American Physical Society (APS) |
| Publication Year: |
2026 |
| Description: |
A sample of of data collected by the Belle II experiment is used to measure the partial branching fractions of charmless semileptonic meson decays and determine the magnitude of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element . Events containing a signal electron or muon and a fully reconstructed hadronic decay that constrains the signal kinematics are selected, while the rest of the event defines the hadronic system associated with the signal. To discriminate the signal from the 50-times larger background originating from CKM-favored semileptonic decays, a template fit is performed in both signal and control regions after applying an optimized selection. The partial branching fraction measured for lepton energies greater than 1 GeV in the signal meson rest frame is . From this measurement, using the Gambino, Giordano, Ossola, Uraltsev theoretical framework, | V u b | = ( 4.01 ± 0.1 9 − 0.08 + 0.07 ) × 10 − 3 is determined, where the uncertainties are experimental and theoretical, respectively. This value is consistent with the world average obtained from previous inclusive ... |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1103/59ws-zxbt |
| DOI: |
10.1103/59ws-zxbt/fulltext |
| Availability: |
https://doi.org/10.1103/59ws-zxbt; https://link.aps.org/article/10.1103/59ws-zxbt; http://harvest.aps.org/v2/journals/articles/10.1103/59ws-zxbt/fulltext |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.AF212FE7 |
| Database: |
BASE |