Eur. Phys. J. C (2024) 84: 195
https://doi.org/10.1140/epjc/s10052-024-12471-9

Regular Article - Experimental Physics

Study of decays at  = 8 TeV with the ATLAS detector

¹ Department of Physics, University of Adelaide, Adelaide, Australia
² Department of Physics, University of Alberta, Edmonton, AB, Canada
³ Department of Physics, Ankara University, Ankara, Türkiye
⁴ Division of Physics, TOBB University of Economics and Technology, Ankara, Türkiye
⁵ LAPP, Université Savoie Mont Blanc, CNRS/IN2P3, Annecy, France
⁶ APC, Université Paris Cité, CNRS/IN2P3, Paris, France
⁷ High Energy Physics Division, Argonne National Laboratory, Argonne, IL, USA
⁸ Department of Physics, University of Arizona, Tucson, AZ, USA
⁹ Department of Physics, University of Texas at Arlington, Arlington, TX, USA
¹⁰ Physics Department, National and Kapodistrian University of Athens, Athens, Greece
¹¹ Physics Department, National Technical University of Athens, Zografou, Greece
¹² Department of Physics, University of Texas at Austin, Austin, TX, USA
¹³ Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan
¹⁴ Institut de Física d’Altes Energies (IFAE), Barcelona Institute of Science and Technology, Barcelona, Spain
¹⁵ Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
¹⁶ Physics Department, Tsinghua University, Beijing, China
¹⁷ Department of Physics, Nanjing University, Nanjing, China
¹⁸ University of Chinese Academy of Science (UCAS), Beijing, China
¹⁹ Institute of Physics, University of Belgrade, Belgrade, Serbia
²⁰ Department for Physics and Technology, University of Bergen, Bergen, Norway
²¹ Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
²² University of California, Berkeley, CA, USA
²³ Institut für Physik, Humboldt Universität zu Berlin, Berlin, Germany
²⁴ Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics, University of Bern, Bern, Switzerland
²⁵ School of Physics and Astronomy, University of Birmingham, Birmingham, UK
²⁶ Department of Physics, Bogazici University, Istanbul, Türkiye
²⁷ Department of Physics Engineering, Gaziantep University, Gaziantep, Türkiye
²⁸ Department of Physics, Istanbul University, Istanbul, Türkiye
²⁹ Istinye University, Sariyer, Istanbul, Türkiye
³⁰ Facultad de Ciencias y Centro de Investigaciónes, Universidad Antonio Nariño, Bogotá, Colombia
³¹ Departamento de Física, Universidad Nacional de Colombia, Bogotá, Colombia
³² Dipartimento di Fisica e Astronomia A. Righi, Università di Bologna, Bologna, Italy
³³ INFN Sezione di Bologna, Bologna, Italy
³⁴ Physikalisches Institut, Universität Bonn, Bonn, Germany
³⁵ Department of Physics, Boston University, Boston, MA, USA
³⁶ Department of Physics, Brandeis University, Waltham, MA, USA
³⁷ Transilvania University of Brasov, Brasov, Romania
³⁸ Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania
³⁹ Department of Physics, Alexandru Ioan Cuza University of Iasi, Iasi, Romania
⁴⁰ Physics Department, National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca, Romania
⁴¹ University Politehnica Bucharest, Bucharest, Romania
⁴² West University in Timisoara, Timisoara, Romania
⁴³ Faculty of Physics, University of Bucharest, Bucharest, Romania
⁴⁴ Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, Slovakia
⁴⁵ Department of Subnuclear Physics, Institute of Experimental Physics of the Slovak Academy of Sciences, Kosice, Slovak Republic
⁴⁶ Physics Department, Brookhaven National Laboratory, Upton, NY, USA
⁴⁷ Instituto de Física de Buenos Aires (IFIBA), Departamento de Física, y CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
⁴⁸ California State University, Long Beach, CA, USA
⁴⁹ Cavendish Laboratory, University of Cambridge, Cambridge, UK
⁵⁰ Department of Physics, University of Cape Town, Cape Town, South Africa
⁵¹ iThemba Labs, Western Cape, South Africa
⁵² Department of Mechanical Engineering Science, University of Johannesburg, Johannesburg, South Africa
⁵³ National Institute of Physics, University of the Philippines, Diliman, Philippines
⁵⁴ Department of Physics, University of South Africa, Pretoria, South Africa
⁵⁵ University of Zululand, KwaDlangezwa, South Africa
⁵⁶ School of Physics, University of the Witwatersrand, Johannesburg, South Africa
⁵⁷ Department of Physics, Carleton University, Ottawa, ON, Canada
⁵⁸ Faculté des Sciences Ain Chock, Réseau Universitaire de Physique des Hautes Energies, Université Hassan II, Casablanca, Morocco
⁵⁹ Faculté des Sciences, Université Ibn-Tofail, Kénitra, Morocco
⁶⁰ Faculté des Sciences Semlalia, Université Cadi Ayyad, LPHEA-Marrakech, Morocco
⁶¹ LPMR, Faculté des Sciences, Université Mohamed Premier, Oujda, Morocco
⁶² Faculté des sciences, Université Mohammed V, Rabat, Morocco
⁶³ Institute of Applied Physics, Mohammed VI Polytechnic University, Ben Guerir, Morocco
⁶⁴ CERN, Geneva, Switzerland
⁶⁵ Affiliated with an Institute Covered by a Cooperation Agreement with CERN, Geneva, Switzerland
⁶⁶ Affiliated with an International Laboratory Covered by a Cooperation Agreement with CERN, Geneva, Switzerland
⁶⁷ Enrico Fermi Institute, University of Chicago, Chicago, IL, USA
⁶⁸ LPC, Université Clermont Auvergne, CNRS/IN2P3, Clermont-Ferrand, France
⁶⁹ Nevis Laboratory, Columbia University, Irvington, NY, USA
⁷⁰ Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
⁷¹ Dipartimento di Fisica, Università della Calabria, Rende, Italy
⁷² INFN Gruppo Collegato di Cosenza, Laboratori Nazionali di Frascati, Frascati, Italy
⁷³ Physics Department, Southern Methodist University, Dallas, TX, USA
⁷⁴ Physics Department, University of Texas at Dallas, Richardson, TX, USA
⁷⁵ National Centre for Scientific Research “Demokritos”, Agia Paraskevi, Greece
⁷⁶ Department of Physics, Stockholm University, Stockholm, Sweden
⁷⁷ Oskar Klein Centre, Stockholm, Sweden
⁷⁸ Deutsches Elektronen-Synchrotron DESY, Hamburg and Zeuthen, Germany
⁷⁹ Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
⁸⁰ Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden, Germany
⁸¹ Department of Physics, Duke University, Durham, NC, USA
⁸² SUPA-School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK
⁸³ INFN e Laboratori Nazionali di Frascati, Frascati, Italy
⁸⁴ Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
⁸⁵ II. Physikalisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany
⁸⁶ Département de Physique Nucléaire et Corpusculaire, Université de Genève, Geneva, Switzerland
⁸⁷ Dipartimento di Fisica, Università di Genova, Genoa, Italy
⁸⁸ INFN Sezione di Genova, Genoa, Italy
⁸⁹ II. Physikalisches Institut, Justus-Liebig-Universität Giessen, Giessen, Germany
⁹⁰ SUPA-School of Physics and Astronomy, University of Glasgow, Glasgow, UK
⁹¹ LPSC, Université Grenoble Alpes, CNRS/IN2P3, Grenoble INP, Grenoble, France
⁹² Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA, USA
⁹³ Department of Modern Physics and State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei, China
⁹⁴ Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao, China
⁹⁵ School of Physics and Astronomy, Shanghai Jiao Tong University, Key Laboratory for Particle Astrophysics and Cosmology (MOE), SKLPPC, Shanghai, China
⁹⁶ Tsung-Dao Lee Institute, Shanghai, China
⁹⁷ Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
⁹⁸ Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
⁹⁹ Department of Physics, Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
¹⁰⁰ Department of Physics, University of Hong Kong, Hong Kong, China
¹⁰¹ Department of Physics and Institute for Advanced Study, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
¹⁰² Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
¹⁰³ IJCLab, Université Paris-Saclay, CNRS/IN2P3, 91405, Orsay, France
¹⁰⁴ Department of Physics, Indiana University, Bloomington, IN, USA
¹⁰⁵ INFN Gruppo Collegato di Udine, Sezione di Trieste, Udine, Italy
¹⁰⁶ ICTP, Trieste, Italy
¹⁰⁷ Dipartimento Politecnico di Ingegneria e Architettura, Università di Udine, Udine, Italy
¹⁰⁸ INFN Sezione di Lecce, Lecce, Italy
¹⁰⁹ Dipartimento di Matematica e Fisica, Università del Salento, Lecce, Italy
¹¹⁰ INFN Sezione di Milano, Milan, Italy
¹¹¹ Dipartimento di Fisica, Università di Milano, Milan, Italy
¹¹² INFN Sezione di Napoli, Naples, Italy
¹¹³ Dipartimento di Fisica, Università di Napoli, Naples, Italy
¹¹⁴ INFN Sezione di Pavia, Pavia, Italy
¹¹⁵ Dipartimento di Fisica, Università di Pavia, Pavia, Italy
¹¹⁶ INFN Sezione di Pisa, Pisa, Italy
¹¹⁷ Dipartimento di Fisica E. Fermi, Università di Pisa, Pisa, Italy
¹¹⁸ INFN Sezione di Roma, Rome, Italy
¹¹⁹ Dipartimento di Fisica, Sapienza Università di Roma, Rome, Italy
¹²⁰ INFN Sezione di Roma Tor Vergata, Rome, Italy
¹²¹ Dipartimento di Fisica, Università di Roma Tor Vergata, Rome, Italy
¹²² INFN Sezione di Roma Tre, Rome, Italy
¹²³ Dipartimento di Matematica e Fisica, Università Roma Tre, Rome, Italy
¹²⁴ INFN-TIFPA, Povo, Italy
¹²⁵ Università degli Studi di Trento, Trento, Italy
¹²⁶ Department of Astro and Particle Physics, Universität Innsbruck, Innsbruck, Austria
¹²⁷ University of Iowa, Iowa City, IA, USA
¹²⁸ Department of Physics and Astronomy, Iowa State University, Ames, IA, USA
¹²⁹ Departamento de Engenharia Elétrica, Universidade Federal de Juiz de Fora (UFJF), Juiz de Fora, Brazil
¹³⁰ Universidade Federal do Rio de Janeiro COPPE/EE/IF, Rio de Janeiro, Brazil
¹³¹ Instituto de Física, Universidade de São Paulo, São Paulo, Brazil
¹³² Rio de Janeiro State University, Rio de Janeiro, Brazil
¹³³ KEK, High Energy Accelerator Research Organization, Tsukuba, Japan
¹³⁴ Graduate School of Science, Kobe University, Kobe, Japan
¹³⁵ Faculty of Physics and Applied Computer Science, AGH University of Krakow, Krakow, Poland
¹³⁶ Marian Smoluchowski Institute of Physics, Jagiellonian University, Krakow, Poland
¹³⁷ Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
¹³⁸ Faculty of Science, Kyoto University, Kyoto, Japan
¹³⁹ Kyoto University of Education, Kyoto, Japan
¹⁴⁰ Research Center for Advanced Particle Physics and Department of Physics, Kyushu University, Fukuoka, Japan
¹⁴¹ Instituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, Argentina
¹⁴² Physics Department, Lancaster University, Lancaster, UK
¹⁴³ Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK
¹⁴⁴ Department of Experimental Particle Physics, Jožef Stefan Institute and Department of Physics, University of Ljubljana, Ljubljana, Slovenia
¹⁴⁵ School of Physics and Astronomy, Queen Mary University of London, London, UK
¹⁴⁶ Department of Physics, Royal Holloway University of London, Egham, UK
¹⁴⁷ Department of Physics and Astronomy, University College London, London, UK
¹⁴⁸ Louisiana Tech University, Ruston, LA, USA
¹⁴⁹ Fysiska institutionen, Lunds universitet, Lund, Sweden
¹⁵⁰ Departamento de Física Teorica C-15 and CIAFF, Universidad Autónoma de Madrid, Madrid, Spain
¹⁵¹ Institut für Physik, Universität Mainz, Mainz, Germany
¹⁵² School of Physics and Astronomy, University of Manchester, Manchester, UK
¹⁵³ CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France
¹⁵⁴ Department of Physics, University of Massachusetts, Amherst, MA, USA
¹⁵⁵ Department of Physics, McGill University, Montreal, QC, Canada
¹⁵⁶ School of Physics, University of Melbourne, Victoria, Australia
¹⁵⁷ Department of Physics, University of Michigan, Ann Arbor, MI, USA
¹⁵⁸ Department of Physics and Astronomy, Michigan State University, East Lansing, MI, USA
¹⁵⁹ Group of Particle Physics, University of Montreal, Montreal, QC, Canada
¹⁶⁰ Fakultät für Physik, Ludwig-Maximilians-Universität München, Munich, Germany
¹⁶¹ Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Munich, Germany
¹⁶² Graduate School of Science and Kobayashi-Maskawa Institute, Nagoya University, Nagoya, Japan
¹⁶³ Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA
¹⁶⁴ Institute for Mathematics, Astrophysics and Particle Physics, Radboud University/Nikhef, Nijmegen, The Netherlands
¹⁶⁵ Nikhef National Institute for Subatomic Physics and University of Amsterdam, Amsterdam, The Netherlands
¹⁶⁶ Department of Physics, Northern Illinois University, DeKalb, IL, USA
¹⁶⁷ New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
¹⁶⁸ University of Sharjah, Sharjah, United Arab Emirates
¹⁶⁹ Department of Physics, New York University, New York, NY, USA
¹⁷⁰ Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
¹⁷¹ Ohio State University, Columbus, OH, USA
¹⁷² Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, USA
¹⁷³ Department of Physics, Oklahoma State University, Stillwater, OK, USA
¹⁷⁴ Palacký University, Joint Laboratory of Optics, Olomouc, Czech Republic
¹⁷⁵ Institute for Fundamental Science, University of Oregon, Eugene, OR, USA
¹⁷⁶ Graduate School of Science, Osaka University, Osaka, Japan
¹⁷⁷ Department of Physics, University of Oslo, Oslo, Norway
¹⁷⁸ Department of Physics, Oxford University, Oxford, UK
¹⁷⁹ LPNHE, Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris, France
¹⁸⁰ Department of Physics, University of Pennsylvania, Philadelphia, PA, USA
¹⁸¹ Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, USA
¹⁸² Laboratório de Instrumentação e Física Experimental de Partículas-LIP, Lisbon, Portugal
¹⁸³ Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
¹⁸⁴ Departamento de Física, Universidade de Coimbra, Coimbra, Portugal
¹⁸⁵ Centro de Física Nuclear da Universidade de Lisboa, Lisbon, Portugal
¹⁸⁶ Departamento de Física, Universidade do Minho, Braga, Portugal
¹⁸⁷ Departamento de Física Teórica y del Cosmos, Universidad de Granada, Granada, Spain
¹⁸⁸ Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
¹⁸⁹ Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic
¹⁹⁰ Czech Technical University in Prague, Prague, Czech Republic
¹⁹¹ Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
¹⁹² Particle Physics Department, Rutherford Appleton Laboratory, Didcot, UK
¹⁹³ IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France
¹⁹⁴ Santa Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz, CA, USA
¹⁹⁵ Departamento de Física, Pontificia Universidad Católica de Chile, Santiago, Chile
¹⁹⁶ Millennium Institute for Subatomic physics at high energy frontier (SAPHIR), Santiago, Chile
¹⁹⁷ Instituto de Investigación Multidisciplinario en Ciencia y Tecnología y Departamento de Física, Universidad de La Serena, La Serena, Chile
¹⁹⁸ Department of Physics, Universidad Andres Bello, Santiago, Chile
¹⁹⁹ Instituto de Alta Investigación, Universidad de Tarapacá, Arica, Chile
²⁰⁰ Departamento de Física, Universidad Técnica Federico Santa María, Valparaíso, Chile
²⁰¹ Department of Physics, University of Washington, Seattle, WA, USA
²⁰² Department of Physics and Astronomy, University of Sheffield, Sheffield, UK
²⁰³ Department of Physics, Shinshu University, Nagano, Japan
²⁰⁴ Department Physik, Universität Siegen, Siegen, Germany
²⁰⁵ Department of Physics, Simon Fraser University, Burnaby, BC, Canada
²⁰⁶ SLAC National Accelerator Laboratory, Stanford, CA, USA
²⁰⁷ Department of Physics, Royal Institute of Technology, Stockholm, Sweden
²⁰⁸ Departments of Physics and Astronomy, Stony Brook University, Stony Brook, NY, USA
²⁰⁹ Department of Physics and Astronomy, University of Sussex, Brighton, UK
²¹⁰ School of Physics, University of Sydney, Sydney, Australia
²¹¹ Institute of Physics, Academia Sinica, Taipei, Taiwan
²¹² E. Andronikashvili Institute of Physics, Iv. Javakhishvili Tbilisi State University, Tbilisi, Georgia
²¹³ High Energy Physics Institute, Tbilisi State University, Tbilisi, Georgia
²¹⁴ University of Georgia, Tbilisi, Georgia
²¹⁵ Department of Physics, Technion, Israel Institute of Technology, Haifa, Israel
²¹⁶ Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel
²¹⁷ Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece
²¹⁸ International Center for Elementary Particle Physics and Department of Physics, University of Tokyo, Tokyo, Japan
²¹⁹ Department of Physics, Tokyo Institute of Technology, Tokyo, Japan
²²⁰ Department of Physics, University of Toronto, Toronto, ON, Canada
²²¹ TRIUMF, Vancouver, BC, Canada
²²² Department of Physics and Astronomy, York University, Toronto, ON, Canada
²²³ Division of Physics and Tomonaga Center for the History of the Universe, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan
²²⁴ Department of Physics and Astronomy, Tufts University, Medford, MA, USA
²²⁵ United Arab Emirates University, Al Ain, United Arab Emirates
²²⁶ Department of Physics and Astronomy, University of California Irvine, Irvine, CA, USA
²²⁷ Department of Physics and Astronomy, University of Uppsala, Uppsala, Sweden
²²⁸ Department of Physics, University of Illinois, Urbana, IL, USA
²²⁹ Instituto de Física Corpuscular (IFIC), Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain
²³⁰ Department of Physics, University of British Columbia, Vancouver, BC, Canada
²³¹ Department of Physics and Astronomy, University of Victoria, Victoria, BC, Canada
²³² Fakultät für Physik und Astronomie, Julius-Maximilians-Universität Würzburg, Würzburg, Germany
²³³ Department of Physics, University of Warwick, Coventry, UK
²³⁴ Waseda University, Tokyo, Japan
²³⁵ Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel
²³⁶ Department of Physics, University of Wisconsin, Madison, WI, USA
²³⁷ Fakultät für Mathematik und Naturwissenschaften, Fachgruppe Physik, Bergische Universität Wuppertal, Wuppertal, Germany
²³⁸ Department of Physics, Yale University, New Haven, CT, USA
²³⁹ Also Affiliated with an Institute Covered by a Cooperation Agreement with CERN, Geneva, Switzerland
²⁴⁰ An-Najah National University, Nablus, Palestine
²⁴¹ Borough of Manhattan Community College, City University of New York, New York, NY, USA
²⁴² Bruno Kessler Foundation, Trento, Italy
²⁴³ Center for High Energy Physics, Peking University, Beijing, China
²⁴⁴ Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Thessaloniki, Greece
²⁴⁵ Centro Studi e Ricerche Enrico Fermi, Rome, Italy
²⁴⁶ CERN, Geneva, Switzerland
²⁴⁷ Département de Physique Nucléaire et Corpusculaire, Université de Genève, Geneva, Switzerland
²⁴⁸ Departament de Fisica de la Universitat Autonoma de Barcelona, Barcelona, Spain
²⁴⁹ Department of Financial and Management Engineering, University of the Aegean, Chios, Greece
²⁵⁰ Department of Physics and Astronomy, Michigan State University, East Lansing, MI, USA
²⁵¹ Department of Physics and Astronomy, University of Louisville, Louisville, KY, USA
²⁵² Department of Physics, Ben Gurion University of the Negev, Beer Sheva, Israel
²⁵³ Department of Physics, California State University, East Bay, USA
²⁵⁴ Department of Physics, California State University, Sacramento, USA
²⁵⁵ Department of Physics, King’s College London, London, UK
²⁵⁶ Department of Physics, Stanford University, Stanford, CA, USA
²⁵⁷ Department of Physics, University of Fribourg, Fribourg, Switzerland
²⁵⁸ Department of Physics, University of Thessaly, Thessaly, Greece
²⁵⁹ Department of Physics, Westmont College, Santa Barbara, USA
²⁶⁰ Hellenic Open University, Patras, Greece
²⁶¹ Institucio Catalana de Recerca i Estudis Avancats, ICREA, Barcelona, Spain
²⁶² Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany
²⁶³ Institute for Nuclear Research and Nuclear Energy (INRNE) of the Bulgarian Academy of Sciences, Sofia, Bulgaria
²⁶⁴ Institute of Particle Physics (IPP), Victoria, Canada
²⁶⁵ Institute of Physics and Technology, Ulaanbaatar, Mongolia
²⁶⁶ Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan
²⁶⁷ Institute of Theoretical Physics, Ilia State University, Tbilisi, Georgia
²⁶⁸ L2IT, Université de Toulouse, CNRS/IN2P3, UPS, Toulouse, France
²⁶⁹ Lawrence Livermore National Laboratory, Livermore, USA
²⁷⁰ National Institute of Physics, University of the Philippines, Diliman, Philippines
²⁷¹ III. Physikalisches Institut A, RWTH Aachen University, Aachen, Germany
²⁷² Technical University of Munich, Munich, Germany
²⁷³ The Collaborative Innovation Center of Quantum Matter (CICQM), Beijing, China
²⁷⁴ TRIUMF, Vancouver, BC, Canada
²⁷⁵ Università di Napoli Parthenope, Naples, Italy
²⁷⁶ University of Chinese Academy of Sciences (UCAS), Beijing, China
²⁷⁷ Department of Physics, University of Colorado Boulder, Colorado, USA
²⁷⁸ Washington College, Chestertown, MD, USA
²⁷⁹ Physics Department, Yeditepe University, Istanbul, Türkiye
²⁸⁰ CERN, 1211, Geneva 23, Switzerland

^a atlas.publications@cern.ch

Received: 19 October 2023
Accepted: 22 January 2024
Published online: 26 February 2024

Abstract

This paper presents a study of  decays with the ATLAS detector at the Large Hadron Collider. The analysis uses a proton–proton data sample corresponding to an integrated luminosity of 20.2 fb collected at a centre-of-mass energy = 8 TeV. Integrated fiducial cross-sections together with normalised differential fiducial cross-sections, sensitive to the kinematics of final-state QED radiation, are obtained. The results are found to be in agreement with state-of-the-art predictions for final-state QED radiation. First measurements of  decays are also reported.