https://doi.org/10.1140/epjc/s10052-021-09775-5
Regular Article - Experimental Physics
Configuration and performance of the ATLAS b-jet triggers in Run 2
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Department of Physics, University of Adelaide, Adelaide, Australia
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Physics Department, SUNY Albany, Albany, NY, USA
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Department of Physics, University of Alberta, Edmonton, AB, Canada
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Department of Physics, Ankara University, Ankara, Turkey
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Istanbul Aydin University, Application and Research Center for Advanced Studies, Istanbul, Turkey
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Division of Physics, TOBB University of Economics and Technology, Ankara, Turkey
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LAPP, Univ. Savoie Mont Blanc, CNRS/IN2P3, Annecy, France
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High Energy Physics Division, Argonne National Laboratory, Argonne, IL, USA
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Department of Physics, University of Arizona, Tucson, AZ, USA
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Department of Physics, University of Texas at Arlington, Arlington, TX, USA
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Physics Department, National and Kapodistrian University of Athens, Athens, Greece
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Physics Department, National Technical University of Athens, Zografou, Greece
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Department of Physics, University of Texas at Austin, Austin, TX, USA
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Bahcesehir University, Faculty of Engineering and Natural Sciences, Istanbul, Turkey
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Istanbul Bilgi University, Faculty of Engineering and Natural Sciences, Istanbul, Turkey
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Department of Physics, Bogazici University, Istanbul, Turkey
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Department of Physics Engineering, Gaziantep University, Gaziantep, Turkey
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Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan
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Institut de Física d’Altes Energies (IFAE), Barcelona Institute of Science and Technology, Barcelona, Spain
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Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
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Physics Department, Tsinghua University, Beijing, China
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Department of Physics, Nanjing University, Nanjing, China
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University of Chinese Academy of Science (UCAS), Beijing, China
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Institute of Physics, University of Belgrade, Belgrade, Serbia
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Department for Physics and Technology, University of Bergen, Bergen, Norway
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Physics Division, Lawrence Berkeley National Laboratory and University of California, Berkeley, CA, USA
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Institut für Physik, Humboldt Universität zu Berlin, Berlin, Germany
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Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics, University of Bern, Bern, Switzerland
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School of Physics and Astronomy, University of Birmingham, Birmingham, UK
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Facultad de Ciencias y Centro de Investigaciónes, Universidad Antonio Nariño, Bogotá, Colombia
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Departamento de Física, Universidad Nacional de Colombia, Bogotá, Colombia
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Dipartimento di Fisica e Astronomia A. Righi, Università di Bologna, Bologna, Italy
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INFN Sezione di Bologna, Bologna, Italy
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Physikalisches Institut, Universität Bonn, Bonn, Germany
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Department of Physics, Boston University, Boston, MA, USA
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Department of Physics, Brandeis University, Waltham, MA, USA
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Transilvania University of Brasov, Brasov, Romania
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Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania
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Department of Physics, Alexandru Ioan Cuza University of Iasi, Iasi, Romania
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National Institute for Research and Development of Isotopic and Molecular Technologies, Physics Department, Cluj-Napoca, Romania
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University Politehnica Bucharest, Bucharest, Romania
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West University in Timisoara, Timisoara, Romania
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Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, Slovak Republic
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Department of Subnuclear Physics, Institute of Experimental Physics of the Slovak Academy of Sciences, Kosice, Slovak Republic
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Physics Department, Brookhaven National Laboratory, Upton, NY, USA
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Departamento de Física (FCEN) and IFIBA, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina
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California State University, Long Beach, CA, USA
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Cavendish Laboratory, University of Cambridge, Cambridge, UK
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Department of Physics, University of Cape Town, Cape Town, South Africa
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iThemba Labs, Western Cape, South Africa
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Department of Mechanical Engineering Science, University of Johannesburg, Johannesburg, South Africa
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National Institute of Physics, University of the Philippines Diliman, Quezon City, Philippines
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University of South Africa, Department of Physics, Pretoria, South Africa
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School of Physics, University of the Witwatersrand, Johannesburg, South Africa
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Department of Physics, Carleton University, Ottawa, ON, Canada
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Faculté des Sciences Ain Chock, Réseau Universitaire de Physique des Hautes Energies-Université Hassan II, Casablanca, Morocco
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Faculté des Sciences, Université Ibn-Tofail, Kénitra, Morocco
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Faculté des Sciences Semlalia, LPHEA-Marrakech, Université Cadi Ayyad, Marrakesh, Morocco
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LPMR, Faculté des Sciences, Université Mohamed Premier, Oujda, Morocco
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Faculté des sciences, Université Mohammed V, Rabat, Morocco
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Mohammed VI Polytechnic University, Ben Guerir, Morocco
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CERN, Geneva, Switzerland
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Enrico Fermi Institute, University of Chicago, Chicago, IL, USA
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LPC, Université Clermont Auvergne, CNRS/IN2P3, Clermont-Ferrand, France
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Nevis Laboratory, Columbia University, Irvington, NY, USA
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Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
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Dipartimento di Fisica, Università della Calabria, Rende, Italy
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Laboratori Nazionali di Frascati, INFN Gruppo Collegato di Cosenza, Cosenza, Italy
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Physics Department, Southern Methodist University, Dallas, TX, USA
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Physics Department, University of Texas at Dallas, Richardson, TX, USA
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National Centre for Scientific Research “Demokritos”, Agia Paraskevi, Greece
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Department of Physics, Stockholm University, Sweden
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Oskar Klein Centre, Stockholm, Sweden
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Deutsches Elektronen-Synchrotron DESY, Hamburg and Zeuthen, Germany
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Lehrstuhl für Experimentelle Physik IV, Technische Universität Dortmund, Dortmund, Germany
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Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden, Germany
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Department of Physics, Duke University, Durham, NC, USA
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SUPA-School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK
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INFN e Laboratori Nazionali di Frascati, Frascati, Italy
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Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
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II. Physikalisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany
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Département de Physique Nucléaire et Corpusculaire, Université de Genève, Geneva, Switzerland
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Dipartimento di Fisica, Università di Genova, Genoa, Italy
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INFN Sezione di Genova, Genoa, Italy
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II. Physikalisches Institut, Justus-Liebig-Universität Giessen, Giessen, Germany
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SUPA-School of Physics and Astronomy, University of Glasgow, Glasgow, UK
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LPSC, Université Grenoble Alpes, CNRS/IN2P3, Grenoble INP, Grenoble, France
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Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA, USA
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Department of Modern Physics, State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei, China
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Institute of Frontier and Interdisciplinary Science, Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao, China
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School of Physics and Astronomy, Key Laboratory for Particle Astrophysics and Cosmology (MOE), SKLPPC, Shanghai Jiao Tong University, Shanghai, China
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Tsung-Dao Lee Institute, Shanghai, China
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Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
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Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
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Department of Physics, Chinese University of Hong Kong, Shatin, N.T., Hong Kong
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Department of Physics, University of Hong Kong, Hong Kong, China
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Department of Physics and Institute for Advanced Study, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
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IJCLab, Université Paris-Saclay, CNRS/IN2P3, 91405, Orsay, France
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Department of Physics, Indiana University, Bloomington, IN, USA
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INFN Gruppo Collegato di Udine, Sezione di Trieste, Udine, Italy
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ICTP, Trieste, Italy
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Dipartimento Politecnico di Ingegneria e Architettura, Università di Udine, Udine, Italy
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INFN Sezione di Lecce, Lecce, Italy
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Dipartimento di Matematica e Fisica, Università del Salento, Lecce, Italy
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INFN Sezione di Milano, Milan, Italy
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Dipartimento di Fisica, Università di Milano, Milan, Italy
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INFN Sezione di Napoli, Naples, Italy
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Dipartimento di Fisica, Università di Napoli, Naples, Italy
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INFN Sezione di Pavia, Pavia, Italy
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Dipartimento di Fisica, Università di Pavia, Pavia, Italy
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INFN Sezione di Pisa, Pisa, Italy
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Dipartimento di Fisica E. Fermi, Università di Pisa, Pisa, Italy
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INFN Sezione di Roma, Rome, Italy
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Dipartimento di Fisica, Sapienza Università di Roma, Rome, Italy
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INFN Sezione di Roma Tor Vergata, Rome, Italy
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Dipartimento di Fisica, Università di Roma Tor Vergata, Rome, Italy
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INFN Sezione di Roma Tre, Rome, Italy
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Dipartimento di Matematica e Fisica, Università Roma Tre, Rome, Italy
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INFN-TIFPA, Povo, Italy
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Università degli Studi di Trento, Trento, Italy
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Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität, Innsbruck, Austria
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University of Iowa, Iowa City, IA, USA
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Department of Physics and Astronomy, Iowa State University, Ames, IA, USA
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Joint Institute for Nuclear Research, Dubna, Russia
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Departamento de Engenharia Elétrica, Universidade Federal de Juiz de Fora (UFJF), Juiz de Fora, Brazil
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Universidade Federal do Rio De Janeiro COPPE/EE/IF, Rio de Janeiro, Brazil
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Instituto de Física, Universidade de São Paulo, São Paulo, Brazil
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KEK, High Energy Accelerator Research Organization, Tsukuba, Japan
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Graduate School of Science, Kobe University, Kobe, Japan
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AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland
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Marian Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland
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Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
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Faculty of Science, Kyoto University, Kyoto, Japan
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Kyoto University of Education, Kyoto, Japan
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Research Center for Advanced Particle Physics and Department of Physics, Kyushu University, Fukuoka, Japan
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Instituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, Argentina
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Physics Department, Lancaster University, Lancaster, UK
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Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK
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Department of Experimental Particle Physics, Jožef Stefan Institute and Department of Physics, University of Ljubljana, Ljubljana, Slovenia
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School of Physics and Astronomy, Queen Mary University of London, London, UK
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Department of Physics, Royal Holloway University of London, Egham, UK
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Department of Physics and Astronomy, University College London, London, UK
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Louisiana Tech University, Ruston, LA, USA
145
Fysiska institutionen, Lunds universitet, Lund, Sweden
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Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules (IN2P3), Villeurbanne, France
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Departamento de Física Teorica C-15 and CIAFF, Universidad Autónoma de Madrid, Madrid, Spain
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Institut für Physik, Universität Mainz, Mainz, Germany
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School of Physics and Astronomy, University of Manchester, Manchester, UK
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CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France
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Department of Physics, University of Massachusetts, Amherst, MA, USA
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Department of Physics, McGill University, Montreal, QC, Canada
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School of Physics, University of Melbourne, Victoria, Australia
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Department of Physics, University of Michigan, Ann Arbor, MI, USA
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Department of Physics and Astronomy, Michigan State University, East Lansing, MI, USA
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B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, Belarus
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Research Institute for Nuclear Problems of Byelorussian State University, Minsk, Belarus
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Group of Particle Physics, University of Montreal, Montreal, QC, Canada
159
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
160
National Research Nuclear University MEPhI, Moscow, Russia
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D.V. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, Moscow, Russia
162
Fakultät für Physik, Ludwig-Maximilians-Universität München, Munich, Germany
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Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Munich, Germany
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Nagasaki Institute of Applied Science, Nagasaki, Japan
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Graduate School of Science and Kobayashi-Maskawa Institute, Nagoya University, Nagoya, Japan
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Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA
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Institute for Mathematics, Astrophysics and Particle Physics, Radboud University/Nikhef, Nijmegen, The Netherlands
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Nikhef National Institute for Subatomic Physics and University of Amsterdam, Amsterdam, The Netherlands
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Department of Physics, Northern Illinois University, DeKalb, IL, USA
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Budker Institute of Nuclear Physics and NSU, SB RAS, Novosibirsk, Russia
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Novosibirsk State University Novosibirsk, Novosibirsk, Russia
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Institute for High Energy Physics of the National Research Centre Kurchatov Institute, Protvino, Russia
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Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of National Research Centre “Kurchatov Institute”, Moscow, Russia
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New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
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United Arab Emirates University, Al Ain, United Arab Emirates
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University of Sharjah, Sharjah, United Arab Emirates
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Department of Physics, New York University, New York, NY, USA
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Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo, Japan
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Ohio State University, Columbus, OH, USA
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Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, USA
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Department of Physics, Oklahoma State University, Stillwater, OK, USA
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Palacký University, Joint Laboratory of Optics, Olomouc, Czech Republic
183
Institute for Fundamental Science, University of Oregon, Eugene, OR, USA
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Graduate School of Science, Osaka University, Osaka, Japan
185
Department of Physics, University of Oslo, Oslo, Norway
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Department of Physics, Oxford University, Oxford, UK
187
LPNHE, CNRS/IN2P3, Sorbonne Université, Université de Paris, Paris, France
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Department of Physics, University of Pennsylvania, Philadelphia, PA, USA
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Konstantinov Nuclear Physics Institute of National Research Centre “Kurchatov Institute”, PNPI, St. Petersburg, Russia
190
Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, USA
191
Laboratório de Instrumentação e Física Experimental de Partículas - LIP, Lisbon, Portugal
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Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
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Departamento de Física, Universidade de Coimbra, Coimbra, Portugal
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Centro de Física Nuclear da Universidade de Lisboa, Lisbon, Portugal
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Departamento de Física, Universidade do Minho, Braga, Portugal
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Departamento de Física Teórica y del Cosmos, Universidad de Granada, Granada (Spain), Portugal
197
Dep Física and CEFITEC of Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
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Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
199
Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic
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Czech Technical University in Prague, Prague, Czech Republic
201
Charles University, Faculty of Mathematics and Physics, Prague, Czech Republic
202
Particle Physics Department, Rutherford Appleton Laboratory, Didcot, UK
203
IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France
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Santa Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz, CA, USA
205
Departamento de Física, Pontificia Universidad Católica de Chile, Santiago, Chile
206
Universidad de la Serena, La Serena, Chile
207
Universidad Andres Bello, Department of Physics, Santiago, Chile
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Instituto de Alta Investigación, Universidad de Tarapacá, Arica, Chile
209
Departamento de Física, Universidad Técnica Federico Santa María, Valparaiso, Chile
210
Universidade Federal de São João del Rei (UFSJ), São João del Rei, Brazil
211
Department of Physics, University of Washington, Seattle, WA, USA
212
Department of Physics and Astronomy, University of Sheffield, Sheffield, UK
213
Department of Physics, Shinshu University, Nagano, Japan
214
Department Physik, Universität Siegen, Siegen, Germany
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Department of Physics, Simon Fraser University, Burnaby, BC, Canada
216
SLAC National Accelerator Laboratory, Stanford, CA, USA
217
Department of Physics, Royal Institute of Technology, Stockholm, Sweden
218
Departments of Physics and Astronomy, Stony Brook University, Stony Brook, NY, USA
219
Department of Physics and Astronomy, University of Sussex, Brighton, UK
220
School of Physics, University of Sydney, Sydney, Australia
221
Institute of Physics, Academia Sinica, Taipei, Taiwan
222
E. Andronikashvili Institute of Physics, Iv. Javakhishvili Tbilisi State University, Tbilisi, Georgia
223
High Energy Physics Institute, Tbilisi State University, Tbilisi, Georgia
224
Department of Physics, Technion, Israel Institute of Technology, Haifa, Israel
225
Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel
226
Department of Physics, Aristotle University of Thessaloniki, Thessaloníki, Greece
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International Center for Elementary Particle Physics and Department of Physics, University of Tokyo, Tokyo, Japan
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Department of Physics, Tokyo Institute of Technology, Tokyo, Japan
229
Tomsk State University, Tomsk, Russia
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Department of Physics, University of Toronto, Toronto, ON, Canada
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TRIUMF, Vancouver, BC, Canada
232
Department of Physics and Astronomy, York University, Toronto, ON, Canada
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Division of Physics and Tomonaga Center for the History of the Universe, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan
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Department of Physics and Astronomy, Tufts University, Medford, MA, USA
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Department of Physics and Astronomy, University of California Irvine, Irvine, CA, USA
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Department of Physics and Astronomy, University of Uppsala, Uppsala, Sweden
237
Department of Physics, University of Illinois, Urbana, IL, USA
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Instituto de Física Corpuscular (IFIC), Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain
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Department of Physics, University of British Columbia, Vancouver, BC, Canada
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Department of Physics and Astronomy, University of Victoria, Victoria, BC, Canada
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Fakultät für Physik und Astronomie, Julius-Maximilians-Universität Würzburg, Würzburg, Germany
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Department of Physics, University of Warwick, Coventry, UK
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Waseda University, Tokyo, Japan
244
Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel
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Department of Physics, University of Wisconsin, Madison, WI, USA
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Fakultät für Mathematik und Naturwissenschaften, Fachgruppe Physik, Bergische Universität Wuppertal, Wuppertal, Germany
247
Department of Physics, Yale University, New Haven, CT, USA
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Borough of Manhattan Community College, City University of New York, New York, NY, USA
249
Center for High Energy Physics, Peking University, Beijing, China
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Centro Studi e Ricerche Enrico Fermi, Rome, Italy
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CERN, Geneva, Switzerland
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CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France
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Département de Physique Nucléaire et Corpusculaire, Université de Genève, Geneva, Switzerland
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Departament de Fisica de la Universitat Autonoma de Barcelona, Barcelona, Spain
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Department of Financial and Management Engineering, University of the Aegean, Chios, Greece
256
Department of Physics and Astronomy, Michigan State University, East Lansing, MI, USA
257
Department of Physics and Astronomy, University of Louisville, Louisville, KY, USA
258
Department of Physics, Ben Gurion University of the Negev, Beer Sheva, Israel
259
Department of Physics, California State University, East Bay, USA
260
Department of Physics, California State University, Fresno, USA
261
Department of Physics, California State University, Sacramento, USA
262
Department of Physics, King’s College London, London, UK
263
Department of Physics, St. Petersburg State Polytechnical University, St. Petersburg, Russia
264
Department of Physics, University of Fribourg, Fribourg, Switzerland
265
Dipartimento di Matematica, Informatica e Fisica, Università di Udine, Udine, Italy
266
Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia
267
Faculty of Engineering, Giresun University, Giresun, Turkey
268
Graduate School of Science, Osaka University, Osaka, Japan
269
Hellenic Open University, Patras, Greece
270
Institucio Catalana de Recerca i Estudis Avancats, ICREA, Barcelona, Spain
271
Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany
272
Institute for Nuclear Research and Nuclear Energy (INRNE) of the Bulgarian Academy of Sciences, Sofia, Bulgaria
273
Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Budapest, Hungary
274
Institute of Particle Physics (IPP), Victoria, Canada
275
Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan
276
Institute of Theoretical Physics, Ilia State University, Tbilisi, Georgia
277
Instituto de Fisica Teorica, IFT-UAM/CSIC, Madrid, Spain
278
Department of Physics, Istanbul University, Istanbul, Turkey
279
Joint Institute for Nuclear Research, Dubna, Russia
280
Moscow Institute of Physics and Technology State University, Dolgoprudny, Russia
281
National Research Nuclear University MEPhI, Moscow, Russia
282
Physics Department, An-Najah National University, Nablus, Palestine
283
Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
284
The City College of New York, New York, NY, USA
285
TRIUMF, Vancouver, BC, Canada
286
Universita di Napoli Parthenope, Naples, Italy
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University of Chinese Academy of Sciences (UCAS), Beijing, China
288
CERN, 1211, Geneva 23, Switzerland
a
atlas.publications@cern.ch
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atlas.publications@cern.ch
Received:
8
June
2021
Accepted:
25
October
2021
Published online:
9
December
2021
Several improvements to the ATLAS triggers used to identify jets containing b-hadrons (b-jets) were implemented for data-taking during Run 2 of the Large Hadron Collider from 2016 to 2018. These changes include reconfiguring the b-jet trigger software to improve primary-vertex finding and allow more stable running in conditions with high pile-up, and the implementation of the functionality needed to run sophisticated taggers used by the offline reconstruction in an online environment. These improvements yielded an order of magnitude better light-flavour jet rejection for the same b-jet identification efficiency compared to the performance in Run 1 (2011–2012). The efficiency to identify b-jets in the trigger, and the conditional efficiency for b-jets that satisfy offline b-tagging requirements to pass the trigger are also measured. Correction factors are derived to calibrate the b-tagging efficiency in simulation to match that observed in data. The associated systematic uncertainties are substantially smaller than in previous measurements. In addition, b-jet triggers were operated for the first time during heavy-ion data-taking, using dedicated triggers that were developed to identify semileptonic b-hadron decays by selecting events with geometrically overlapping muons and jets.
© The Author(s) 2021
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