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Test of lepton flavor universality in B ± → K ± μ + μ − and B ± → K ± e + e − decays in proton-proton collisions at s = 13 TeV

Title: Test of lepton flavor universality in B ± → K ± μ + μ − and B ± → K ± e + e − decays in proton-proton collisions at s = 13 TeV
Authors: CMS Collaboration, The
Contributors: Austrian Federal Ministry of Education, Science and Research; Austrian Science Fund; Belgian Fonds de la Recherche Scientifique; Belgian Fonds voor Wetenschappelijk Onderzoek; CNPq; CAPES; FAPERJ; FAPERGS; FAPESP; Bulgarian Ministry of Education and Science; Bulgarian National Science Fund; CERN; Chinese Academy of Sciences; Ministry of Science and Technology; Chinese National Natural Science Foundation of China; Colombian Funding Agency; Croatian Ministry of Science, Education and Sport; Croatian Science Foundation; Research and Innovation Foundation; SENESCYT; Ministry of Education and Research; Estonian Research Council; European Regional Development Fund; Academy of Finland; Finnish Ministry of Education and Culture; Helsinki Institute of Physics; Institut National de Physique Nucléaire et de Physique des Particules; Centre National de la Recherche Scientifique; Commissariat à l’Énergie Atomique et aux Énergies Alternatives; Shota Rustaveli National Science Foundation; Bundesministerium für Bildung und Forschung; Deutsche Forschungsgemeinschaft; Helmholtz-Gemeinschaft Deutscher Forschungszentren; General Secretariat for Research and Innovation; National Research, Development and Innovation Office; Department of Atomic Energy; Department of Science and Technology; ICSC –National Research Centre for High Performance Computing, Big Data and Quantum Computing, funded by the EU NexGeneration program; Institute for Research in Fundamental Studies; Science Foundation; Istituto Nazionale di Fisica Nucleare; Korean Ministry of Education, Science and Technology; National Research Foundation of Korea; MES; Lithuanian Academy of Sciences; Ministry of Education; University of Malaya; BUAP; CINVESTAV; CONACYT; LNS; SEP; UASLP; MOS; Ministry of Business, Innovation and Employment; Pakistan Atomic Energy Commission; Ministry of Educaton and Science; National Science Centre; Fundação para a Ciência e a Tecnologia; Ministry of Education, Science and Technological Development of Serbia; MCIN/AEI, ERDF “a way of making Europe”; Fondo Europeo de Desarrollo Regional, Spain; Plan de Ciencia, Tecnología e Innovación del Principado de Asturias; MOSTR; ETH Board; ETH Zurich; PSI; SNF; UniZH; Canton Zurich; SER; Thailand Center of Excellence in Physics; Institute for the Promotion of Teaching Science and Technology of Thailand; Special Task Force for Activating Research; National Science and Technology Development Agency of Thailand; Scientific and Technical Research Council of Turkey; Turkish Atomic Energy Authority; National Academy of Sciences of Ukraine; Science and Technology Facilities Council; US Department of Energy; US National Science Foundation; Marie-Curie programme; European Research Council and EPLANET; European Research Council/European Cooperation in Science and Technology; Horizon 2020; Leventis Foundation; Alfred P. Sloan Foundation; Alexander von Humboldt Foundation; Science Committee, project no. 22rl-037; Belgian Federal Science Policy Office; Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture; Agentschap voor Innovatie door Wetenschap en Technologie; Belgian Fonds de la Recherche Scientifique, “Excellence of Science - EOS”; Belgian Fonds voor Wetenschappelijk Onderzoek, “Excellence of Science - EOS”; Beijing Municipal Science & Technology Commission; Fundamental Research Funds for the Central Universities; Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; Deutsche Forschungsgemeinschaft (DFG) under Germany’s Excellence Strategy – EXC 2121 “Quantum Universe”; Hellenic Foundation for Research and Innovation; Hungarian Academy of Sciences; New National Excellence Program - ÚNKP, the NKFIH research grants; Council of Scientific and Industrial Research, India; Latvian Council of Science; Ministy of Education and Science; National Science Center; National Priorities Research Program by Qatar National Research Fund; Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu; Programa Severo Ochoa del Principado de Asturias; Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University; CUAASC; Kavli Foundation; Nvidia Corporation; Welch Foundation; Weston Havens Foundation; Institut für Hochenergiephysik (HEPHY) using the Cloud Infrastructure Platform (CLIP), Vienna; Inter-University Institute for High Energies, Brussels; Université Catholique de Louvain, Louvain-la-Neuve; São Paulo Research and Analysis Center, São Paulo; Universidade do Estado do Rio de Janeiro, Rio de Janeiro; University of Sofia, Sofia; Institute of High Energy Physics of the Chinese Academy of Sciences, Beijing; National Institute of Chemical Physics and Biophysics, Tallinn; Helsinki Institute of Physics, Helsinki; Grille de Recherche d’Ile de France; Institut de recherche sur les lois fondamentales de l’Univers, CEA, Université Paris-Saclay, Gif-sur-Yvette; Institut national de physique nucléaire et de physique des particules, IN2P3, Villeurbanne; Institut Pluridisciplinaire Hubert Curien (IPHC), Strasbourg; Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau; Deutsches Elektronen-Synchrotron, Hamburg; Karlsruher Institut für Technologie, Karlsruhe; RWTH Aachen University, Aachen; University of Ioánnina, Ioánnina; Wigner Research Centre for Physics, Budapest; Tata Institute of Fundamental Research, Mumbai; INFN CNAF, Bologna; INFN Sezione di Bari, Universitá di Bari, Politecnico di Bari, Bari; INFN Sezione di Pisa, Universitá di Pisa, Scuola Normale Superiore di Pisa, Pisa; INFN Sezione di Roma, Sapienza Universitá di Roma, Rome; INFN Sezione di Trieste, Universitá di Trieste, Trieste; Laboratori Nazionali di Legnaro, Legnaro; Kyungpook National University, Daegu; National Centre for Physics, Quaid-I-Azam University, Islamabad; Akademickie Centrum Komputerowe Cyfronet AGH, Krakow; National Centre for Nuclear Research, Swierk; Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa; Korea Institute of Science and Technology Information (KISTI), Daejeon; Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid; Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander; Port d’Informació Científica, Bellaterra; CERN, European Organization for Nuclear Research, Geneva; CSCS - Swiss National Supercomputing Centre, Lugano; Instrumentation and Detector Consortium, Taipei; National Center for High-performance Computing (NCHC), Hsinchu City; Middle East Technical University, Physics Department, Ankara; National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov; GridPP, Brunel University, Uxbridge; GridPP, Imperial College, London; GridPP, Queen Mary University of London, London; GridPP, Royal Holloway, University of London, London; GridPP, Rutherford Appleton Laboratory, Didcot; GridPP, University of Bristol, Bristol; GridPP, University of Glasgow, Glasgow; GridPP, University of Oxford, Oxford; Baylor University, Waco; California Institute of Technology, Pasadena; Fermi National Accelerator Laboratory, Batavia; Massachusetts Institute of Technology, Cambridge; National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility, Berkeley; Open Science Grid (OSG) Consortium; Pittsburgh Supercomputing Center (PSC), Pittsburgh; Purdue University, West Lafayette; San Diego Supercomputer Center (SDSC), La Jolla; Texas Advanced Computing Center (TACC), Austin; University of California, San Diego, La Jolla; University of Colorado Boulder, Boulder; University of Florida, Gainesville; University of Nebraska-Lincoln, Lincoln; University of Wisconsin - Madison, Madison; Vanderbilt University, Nashville
Source: Reports on Progress in Physics ; volume 87, issue 7, page 077802 ; ISSN 0034-4885 1361-6633
Publisher Information: IOP Publishing
Publication Year: 2024
Description: A test of lepton flavor universality in B ± → K ± μ + μ − and B ± → K ± e + e − decays, as well as a measurement of differential and integrated branching fractions of a nonresonant B ± → K ± μ + μ − decay are presented. The analysis is made possible by a dedicated data set of proton-proton collisions at s = 13 TeV recorded in 2018, by the CMS experiment at the LHC, using a special high-rate data stream designed for collecting about 10 billion unbiased b hadron decays. The ratio of the branching fractions B ( B ± → K ± μ + μ − ) to B ( B ± → K ± e + e − ) is determined from the measured double ratio R ( K ) of these decays to the respective branching fractions of the B ± → J / ψ K ± with J / ψ → μ + μ − and e + e − decays, which allow for significant cancellation of systematic uncertainties. The ratio R ( K ) is measured in the range 1.1 < q 2 < 6.0 GeV 2 , where q is the invariant mass of the lepton pair, and is found to be R ( K ) = 0.78 − 0.23 + 0.47 , in agreement with the standard model expectation R ( K ) ≈ 1 . This measurement is limited by the statistical precision of the electron channel. The integrated branching fraction in the same q 2 range, B ( B ± → K ± μ + μ − ) = ( 12.42 ± 0.68 ) × 10 − 8 , is consistent with the present world-average value and has a comparable precision.
Document Type: article in journal/newspaper
Language: unknown
DOI: 10.1088/1361-6633/ad4e65
DOI: 10.1088/1361-6633/ad4e65/pdf
Availability: https://doi.org/10.1088/1361-6633/ad4e65; https://iopscience.iop.org/article/10.1088/1361-6633/ad4e65; https://iopscience.iop.org/article/10.1088/1361-6633/ad4e65/pdf
Rights: http://creativecommons.org/licenses/by/4.0 ; https://iopscience.iop.org/info/page/text-and-data-mining
Accession Number: edsbas.B86E984D
Database: BASE