| Title: |
Observation of time-dependent C P violation and measurement of the branching fraction of B 0 → J / ψ π 0 decays |
| Authors: |
Adachi, I.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Althubiti, N.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, V.; Aversano, M.; Ayad, R.; Babu, V.; Bae, H.; Baghel, N. K.; Bahinipati, S.; Bambade, P.; Banerjee, Sw.; Bansal, S.; Baudot, J.; Baur, A.; Beaubien, A.; Becherer, F.; Becker, J.; Bennett, J. V.; Bernlochner, F. U.; Bertacchi, V.; Bertemes, M.; Bertholet, E.; Bessner, M.; Bettarini, S.; Bhardwaj, V.; Bianchi, F.; Bilka, T.; Biswas, D.; Bobrov, A.; Bodrov, D.; Bondar, A.; Borah, J.; Boschetti, A.; Bozek, A.; Bračko, M.; Branchini, P.; Briere, R. A.; Browder, T. E.; Budano, A.; Bussino, S.; Campagna, Q.; Campajola, 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; 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; 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; Javna Agencija za Raziskovalno Dejavnost RS; Agencia Estatal de Investigación; Generalitat Valenciana; 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 111, issue 1 ; ISSN 2470-0010 2470-0029 |
| Publisher Information: |
American Physical Society (APS) |
| Publication Year: |
2025 |
| Description: |
We present a measurement of the branching fraction and time-dependent charge-parity ( ) decay-rate asymmetries in decays. The data sample was collected with the Belle II detector at the SuperKEKB asymmetric collider in 2019–2022 and contains meson pairs from decays. We reconstruct signal decays and fit the parameters from the distribution of the proper-decay-time difference of the two mesons. We measure the branching fraction to be and the direct and mixing-induced CP asymmetries to be C C P = 0.13 ± 0.12 ± 0.03 and SCP=−0.88±0.17±0.03, respectively, where the first uncertainties are statistical and the second are systematic. We observe mixing-induced CP violation with a significance of 5.0 standard deviations for the first time in this mode. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1103/physrevd.111.012011 |
| DOI: |
10.1103/PhysRevD.111.012011 |
| DOI: |
10.1103/PhysRevD.111.012011/fulltext |
| Availability: |
https://doi.org/10.1103/physrevd.111.012011; https://link.aps.org/article/10.1103/PhysRevD.111.012011; http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.111.012011/fulltext |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.DA8B1A07 |
| Database: |
BASE |