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Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at s = 13 TeV with the ATLAS detector

  • ATLAS Collaboration
  • Aix-Marseille Université and CNRS/IN2P3
  • University of Bergen
  • University of Oklahoma
  • New York University Abu Dhabi
  • iThemba Laboratory for Accelerator Based Sciences
  • Indian Institute of Technology Tirupati
  • University of South Africa
  • University of Zululand
  • Cadi Ayyad University
  • Departamento de Física Teórica y del Cosmos
  • University of Granada
  • CERN
  • University of Göttingen
  • TU Dortmund University
  • United States Department of Energy
  • Southern Methodist University
  • Mohammed V University in Rabat
  • Tel Aviv University
  • New York University
  • National Institute for Nuclear Physics
  • Abdus Salam International Centre for Theoretical Physics
  • King's College London
  • Heidelberg University 
  • IN2P3
  • AGH University of Krakow
  • SLAC National Accelerator Laboratory
  • University of Manchester
  • Northern Illinois University
  • Istanbul University
  • Rutherford Appleton Laboratory
  • University of California at Santa Cruz
  • The University of Chicago
  • Institute for High Energy Physics
  • Johannes Gutenberg University Mainz
  • Alexandru Ioan Cuza University of Iaşi
  • Azerbaijan National Academy of Sciences
  • Royal Holloway University of London
  • Zhengzhou University
  • University of Rome Tor Vergata
  • University of Valencia
  • University of Hassan II Casablanca
  • Lund University
  • Stony Brook University
  • Waseda University
  • University of Bonn
  • Bogazici University
  • Columbia University
  • University of Victoria BC
  • Université Grenoble Alpes
  • University of Edinburgh
  • Oklahoma State University
  • Horia Hulubei National Institute of Physics and Nuclear Engineering
  • National Technical University of Athens
  • University of Geneva
  • University of Warwick
  • Czech Technical University in Prague
  • Lancaster University
  • Al-Imam Muhammad Ibn Saud Islamic University
  • California State University Fresno
  • University of Liverpool
  • University of Johannesburg
  • Université Paris-Saclay
  • University of Sussex
  • Universidad Técnica Federico Santa Maria
  • University of Birmingham
  • University of Naples Federico II
  • Universidad Nacional de La Plata
  • University of Washington
  • Universidad Autónoma de Madrid
  • Universidade Federal do Rio de Janeiro
  • McGill University
  • Ludwig Maximilian University of Munich
  • University of Michigan, Ann Arbor
  • University of Freiburg
  • University of Toronto
  • Laboratório de Instrumentação e Física Experimental de Partículas
  • Aristotle University of Thessaloniki
  • High Energy Accelerator Research Organization, Tsukuba
  • University of Oslo
  • University of Sheffield
  • University of Texas at Austin
  • University of Glasgow
  • University of Milan
  • National and Kapodistrian University of Athens
  • The University of Tokyo
  • German Electron Synchrotron
  • Brandeis University
  • Institute of Nuclear Physics PAN
  • Duke University
  • University of Montreal
  • University of Rome La Sapienza
  • Nagoya University
  • Ochanomizu University
  • Comenius University
  • University of California at Irvine
  • University of Cape Town
  • Mohammed VI Polytechnic University
  • University of Pennsylvania
  • TRIUMF
  • Slovak Academy of Sciences
  • University of Thessaly
  • Carleton University
  • Technische Universität Dresden
  • Humboldt University of Berlin
  • University of Oregon
  • Queen Mary University of London
  • Yale University
  • University of Belgrade
  • University of Texas at Arlington
  • University of Bologna
  • University of Cambridge
  • United Arab Emirates University
  • University of Pittsburgh
  • University of Melbourne
  • University of Genoa
  • University of Amsterdam
  • Max Planck Institute for Physics (Werner Heisenberg Institute)
  • Joint Laboratory of Optics
  • University of Science and Technology of China
  • University of Oxford
  • University College London
  • CAS - Institute of High Energy Physics
  • An-Najah National University
  • University of British Columbia
  • University of Siegen
  • University of Innsbruck
  • Universidad de Buenos Aires
  • Sorbonne Université
  • Tufts University
  • University of Bern
  • University of Fribourg
  • Istinye University
  • Universidade do Estado do Rio de Janeiro
  • Harvard University
  • Uppsala University
  • Lawrence Berkeley National Laboratory
  • Université Paris Cité
  • Charles University
  • University of Würzburg
  • University of Wuppertal
  • Gaziantep University
  • Weizmann Institute of Science
  • University of Calabria
  • Stockholm University
  • Université Clermont Auvergne
  • Ohio State University
  • University of Massachusetts
  • University of Trento
  • Michigan State University
  • Indiana University Bloomington
  • York University Toronto
  • Oskar Klein Centre
  • University of Illinois at Urbana-Champaign
  • Simon Fraser University
  • Boston University
  • Justus Liebig University Giessen
  • University of Chinese Academy of Sciences
  • Nanjing University
  • Ankara University
  • University of Copenhagen
  • Westmont College
  • Radboud University Nijmegen
  • ICREA
  • University of Minho
  • Universidad Nacional de Colombia
  • Universidade Federal de Juiz de Fora
  • Ivane Javakhishvili Tbilisi State University
  • Argonne National Laboratory
  • Shanghai Jiao Tong University
  • Kyoto University
  • Tsinghua University
  • The Collaborative Innovation Center of Quantum Matter (CICQM)
  • University of Wisconsin-Madison
  • Chinese University of Hong Kong
  • University of Arizona
  • National Tsing Hua University
  • Sofia University St. Kliment Ohridski
  • Czech Academy of Sciences
  • University of Ljubljana
  • University of Udine
  • University of Lisbon
  • University of Naples Parthenope
  • Institute of Particle Physics
  • Academia Sinica - Institute of Physics
  • University of Salento
  • Roma Tre University
  • Pontificia Universidad Católica de Chile
  • Ministerio de Planificación, Chile
  • University of Bucharest
  • Universidade Federal da Bahia
  • Ibn Tofail University
  • The University of Hong Kong
  • Louisiana Tech University
  • Shandong University
  • CSIC - Institute of Microelectronics of Barcelona
  • Adelaide University
  • University of Coimbra
  • City University of New York
  • University of the Philippines
  • University of the Aegean
  • University of Pisa
  • University of Sharjah
  • University of New Mexico
  • Demokritos National Centre for Scientific Research
  • Jagiellonian University in Kraków
  • University of Alberta
  • University of the Witwatersrand
  • University of Georgia
  • West University of Timisoara
  • Henan University
  • A. Alikhanian Yerevan Institute of Physics
  • Shinshu University
  • Technical University of Munich
  • The University of Osaka
  • University of Tsukuba
  • National University of Science and Technology POLITEHNICA Bucharest
  • Azerbaijan State University of Economics
  • Universidade de São Paulo
  • University of Pavia
  • Yeditepe University
  • University of Texas at Dallas
  • Georgian Academy of Sciences E. Andronikashvili Institute of Physics
  • Institute of Science Tokyo
  • Technion-Israel Institute of Technology
  • Center for Interdisciplinary Research and Innovation (CIRI-AUTH)
  • Iowa State University
  • Universidad Andrés Bello
  • Kobe University
  • University of the Western Cape
  • Hellenic Open University
  • KTH Royal Institute of Technology
  • Peking University
  • Hong Kong University of Science and Technology
  • Sun Yat-Sen University
  • Stellenbosch University
  • University of Iowa
  • CNRS
  • Kyushu University
  • California State University Sacramento
  • Mohamed I University
  • University of Colorado Boulder
  • Universidad Antonio Nariño
  • The University of Sydney
  • University of Hamburg
  • Transilvania University of Brasov
  • National Institute for Research and Development of Isotopic and Molecular Technologies
  • Universidad de Tarapacá
  • Bulgarian Academy of Sciences
  • Washington College
  • University of West Attica
  • Universidad de La Serena
  • TOBB University of Economics and Technology
  • Stanford University
  • University of California at Berkeley

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4 Citas (Scopus)

Resumen

A measurement of the ratio of the branching fractions, Rτ/e = B(W → τν)/B(W → eν), is performed using a sample of W bosons originating from top-quark decays to final states containing τ-leptons or electrons. This measurement uses pp collisions at s = 13 TeV, collected by the ATLAS experiment at the Large Hadron Collider during Run 2, corresponding to an integrated luminosity of 140 fb−1. The W → τντ (with τ → eνeντ) and W → eνe decays are distinguished using the differences in the impact parameter distributions and transverse momentum spectra of the electrons. The measured ratio of branching fractions Rτ/e = 0.975 ± 0.012 (stat.) ± 0.020 (syst.), is consistent with the Standard Model assumption of lepton flavour universality in W-boson decays.

Idioma originalInglés
Número de artículo38
PublicaciónJournal of High Energy Physics
Volumen2025
N.º5
DOI
EstadoPublicada - may 2025

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