Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at sqrt[s]=13 TeV
Affiliations
- 1 Yerevan Physics Institute, Yerevan, Armenia.
- 2 Institut für Hochenergiephysik, Wien, Austria.
- 3 Institute for Nuclear Problems, Minsk, Belarus.
- 4 Universiteit Antwerpen, Antwerpen, Belgium.
- 5 Vrije Universiteit Brussel, Brussel, Belgium.
- 6 Université Libre de Bruxelles, Bruxelles, Belgium.
- 7 Ghent University, Ghent, Belgium.
- 8 Université Catholique de Louvain, Louvain-la-Neuve, Belgium.
- 9 Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil.
- 10 Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
- 11 Universidade Estadual Paulista, São Paulo, Brazil.
- 12 Universidade Federal do ABC, São Paulo, Brazil.
- 13 Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria.
- 14 University of Sofia, Sofia, Bulgaria.
- 15 Beihang University, Beijing, China.
- 16 Institute of High Energy Physics, Beijing, China.
- 17 State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.
- 18 Tsinghua University, Beijing, China.
- 19 Universidad de Los Andes, Bogota, Colombia.
- 20 Universidad de Antioquia, Medellin, Colombia.
- 21 University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia.
- 22 University of Split, Faculty of Science, Split, Croatia.
- 23 Institute Rudjer Boskovic, Zagreb, Croatia.
- 24 University of Cyprus, Nicosia, Cyprus.
- 25 Charles University, Prague, Czech Republic.
- 26 Escuela Politecnica Nacional, Quito, Ecuador.
- 27 Universidad San Francisco de Quito, Quito, Ecuador.
- 28 Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt.
- 29 National Institute of Chemical Physics and Biophysics, Tallinn, Estonia.
- 30 Department of Physics, University of Helsinki, Helsinki, Finland.
- 31 Helsinki Institute of Physics, Helsinki, Finland.
- 32 Lappeenranta University of Technology, Lappeenranta, Finland.
- 33 IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France.
- 34 Laboratoire Leprince-Ringuet, Ecole polytechnique, CNRS/IN2P3, Université Paris-Saclay, Palaiseau, France.
- 35 Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France.
- 36 Centre de Calcul de l'Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France.
- 37 Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France.
- 38 Georgian Technical University, Tbilisi, Georgia.
- 39 Tbilisi State University, Tbilisi, Georgia.
- 40 RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany.
- 41 RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany.
- 42 RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany.
- 43 Deutsches Elektronen-Synchrotron, Hamburg, Germany.
- 44 University of Hamburg, Hamburg, Germany.
- 45 Karlsruher Institut fuer Technologie, Karlsruhe, Germany.
- 46 Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece.
- 47 National and Kapodistrian University of Athens, Athens, Greece.
- 48 National Technical University of Athens, Athens, Greece.
- 49 University of Ioánnina, Ioánnina, Greece.
- 50 MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary.
- 51 Wigner Research Centre for Physics, Budapest, Hungary.
- 52 Institute of Nuclear Research ATOMKI, Debrecen, Hungary.
- 53 Institute of Physics, University of Debrecen, Debrecen, Hungary.
- 54 Indian Institute of Science (IISc), Bangalore, India.
- 55 National Institute of Science Education and Research, HBNI, Bhubaneswar, India.
- 56 Panjab University, Chandigarh, India.
- 57 University of Delhi, Delhi, India.
- 58 Saha Institute of Nuclear Physics, HBNI, Kolkata,India.
- 59 Indian Institute of Technology Madras, Madras, India.
- 60 Bhabha Atomic Research Centre, Mumbai, India.
- 61 Tata Institute of Fundamental Research-A, Mumbai, India.
- 62 Tata Institute of Fundamental Research-B, Mumbai, India.
- 63 Indian Institute of Science Education and Research (IISER), Pune, India.
- 64 Institute for Research in Fundamental Sciences (IPM), Tehran, Iran.
- 65 University College Dublin, Dublin, Ireland.
- 66 INFN Sezione di Bari, Bari, Italy.
- 67 Università di Bari, Bari, Italy.
- 68 Politecnico di Bari, Bari, Italy.
- 69 INFN Sezione di Bologna, Bologna, Italy.
- 70 Università di Bologna, Bologna, Italy.
- 71 INFN Sezione di Catania, Catania, Italy.
- 72 Università di Catania, Catania, Italy.
- 73 INFN Sezione di Firenze, Firenze, Italy.
- 74 Università di Firenze, Firenze, Italy.
- 75 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 76 INFN Sezione di Genova, Genova, Italy.
- 77 Università di Genova, Genova, Italy.
- 78 INFN Sezione di Milano-Bicocca, Milano, Italy.
- 79 Università di Milano-Bicocca, Milano, Italy.
- 80 INFN Sezione di Napoli, Napoli, Italy.
- 81 Università della Basilicata, Potenza, Italy.
- 82 Università di Napoli 'Federico II', Napoli, Italy.
- 83 Università G. Marconi, Roma, Italy.
- 84 INFN Sezione di Padova, Padova, Italy.
- 85 Università di Padova, Padova, Italy.
- 86 INFN Sezione di Pavia, Pavia, Italy.
- 87 Università di Pavia, Pavia, Italy.
- 88 INFN Sezione di Perugia, Perugia, Italy.
- 89 Università di Perugia, Perugia, Italy.
- 90 INFN Sezione di Pisa, Pisa, Italy.
- 91 Università di Pisa, Pisa, Italy.
- 92 Scuola Normale Superiore di Pisa, Pisa, Italy.
- 93 INFN Sezione di Roma, Rome, Italy.
- 94 Sapienza Università di Roma, Rome, Italy.
- 95 INFN Sezione di Torino, Torino, Italy.
- 96 Università di Torino, Torino, Italy.
- 97 Università del Piemonte Orientale, Novara, Italy.
- 98 INFN Sezione di Trieste, Trieste, Italy.
- 99 Università di Trieste, Trieste, Italy.
- 100 Kyungpook National University, Daegu, Korea.
- 101 Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea.
- 102 Hanyang University, Seoul, Korea.
- 103 Korea University, Seoul, Korea.
- 104 Sejong University, Seoul, Korea.
- 105 Seoul National University, Seoul, Korea.
- 106 University of Seoul, Seoul, Korea.
- 107 Sungkyunkwan University, Suwon, Korea.
- 108 Riga Technical University, Riga, Latvia.
- 109 Vilnius University, Vilnius, Lithuania.
- 110 National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia.
- 111 Universidad de Sonora (UNISON), Hermosillo, Mexico.
- 112 Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico.
- 113 Universidad Iberoamericana, Mexico City, Mexico.
- 114 Benemerita Universidad Autonoma de Puebla, Puebla, Mexico.
- 115 Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico.
- 116 University of Montenegro, Podgorica, Montenegro.
- 117 University of Auckland, Auckland, New Zealand.
- 118 University of Canterbury, Christchurch, New Zealand.
- 119 National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan.
- 120 National Centre for Nuclear Research, Swierk, Poland.
- 121 Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland.
- 122 Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal.
- 123 Joint Institute for Nuclear Research, Dubna, Russia.
- 124 Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia.
- 125 Institute for Nuclear Research, Moscow, Russia.
- 126 Institute for Theoretical and Experimental Physics, Moscow, Russia.
- 127 Moscow Institute of Physics and Technology, Moscow, Russia.
- 128 National Research Nuclear University 'Moscow Engineering Physics Institute' (MEPhI), Moscow, Russia.
- 129 P.N. Lebedev Physical Institute, Moscow, Russia.
- 130 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia.
- 131 Novosibirsk State University (NSU), Novosibirsk, Russia.
- 132 Institute for High Energy Physics of National Research Centre 'Kurchatov Institute', Protvino, Russia.
- 133 National Research Tomsk Polytechnic University, Tomsk, Russia.
- 134 University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia.
- 135 Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.
- 136 Universidad Autónoma de Madrid, Madrid, Spain.
- 137 Universidad de Oviedo, Oviedo, Spain.
- 138 Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain.
- 139 University of Ruhuna, Department of Physics, Matara, Sri Lanka.
- 140 CERN, European Organization for Nuclear Research, Geneva, Switzerland.
- 141 Paul Scherrer Institut, Villigen, Switzerland.
- 142 ETH Zurich-Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland.
- 143 Universität Zürich, Zurich, Switzerland.
- 144 National Central University, Chung-Li, Taiwan.
- 145 National Taiwan University (NTU), Taipei, Taiwan.
- 146 Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand.
- 147 Çukurova University, Physics Department, Science and Art Faculty, Adana, Turkey.
- 148 Middle East Technical University, Physics Department, Ankara, Turkey.
- 149 Bogazici University, Istanbul, Turkey.
- 150 Istanbul Technical University, Istanbul, Turkey.
- 151 Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov, Ukraine.
- 152 National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine.
- 153 University of Bristol, Bristol, United Kingdom.
- 154 Rutherford Appleton Laboratory, Didcot, United Kingdom.
- 155 Imperial College, London, United Kingdom.
- 156 Brunel University, Uxbridge, United Kingdom.
- 157 Baylor University, Waco, Texas, USA.
- 158 Catholic University of America, Washington, DC, USA.
- 159 The University of Alabama, Tuscaloosa, Alabama, USA.
- 160 Boston University, Boston, Massachusetts, USA.
- 161 Brown University, Providence, Rhode Island, USA.
- 162 University of California, Davis, Davis, California, USA.
- 163 University of California, Los Angeles, California, USA.
- 164 University of California, Riverside, Riverside, California, USA.
- 165 University of California, San Diego, La Jolla, California, USA.
- 166 University of California, Santa Barbara-Department of Physics, Santa Barbara, California, USA.
- 167 California Institute of Technology, Pasadena, California, USA.
- 168 Carnegie Mellon University, Pittsburgh, Pennsylvania, USA.
- 169 University of Colorado Boulder, Boulder, Colorado, USA.
- 170 Cornell University, Ithaca, New York, USA.
- 171 Fermi National Accelerator Laboratory, Batavia, Illinois, USA.
- 172 University of Florida, Gainesville, Florida, USA.
- 173 Florida International University, Miami, Florida, USA.
- 174 Florida State University, Tallahassee, Florida, USA.
- 175 Florida Institute of Technology, Melbourne, Florida, USA.
- 176 University of Illinois at Chicago (UIC), Chicago, Illinois, USA.
- 177 The University of Iowa, Iowa City, Iowa, USA.
- 178 Johns Hopkins University, Baltimore, Maryland, USA.
- 179 The University of Kansas, Lawrence, Kansas, USA.
- 180 Kansas State University, Manhattan, Kansas, USA.
- 181 Lawrence Livermore National Laboratory, Livermore, California, USA.
- 182 University of Maryland, College Park, Maryland, USA.
- 183 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
- 184 University of Minnesota, Minneapolis, Minnesota, USA.
- 185 University of Mississippi, Oxford, Mississippi, USA.
- 186 University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
- 187 State University of New York at Buffalo, Buffalo, New York, USA.
- 188 Northeastern University, Boston, Massachusetts, USA.
- 189 Northwestern University, Evanston, Illinois, USA.
- 190 University of Notre Dame, Notre Dame, Indiana, USA.
- 191 The Ohio State University, Columbus, Ohio, USA.
- 192 Princeton University, Princeton, New Jersey, USA.
- 193 University of Puerto Rico, Mayaguez, Puerto Rico.
- 194 Purdue University, West Lafayette, Indiana, USA.
- 195 Purdue University Northwest, Hammond, Indiana, USA.
- 196 Rice University, Houston, Texas, USA.
- 197 University of Rochester, Rochester, New York, USA.
- 198 Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA.
- 199 University of Tennessee, Knoxville, Tennessee, USA.
- 200 Texas A&M University, College Station, Texas, USA.
- 201 Texas Tech University, Lubbock, Texas, USA.
- 202 Vanderbilt University, Nashville, Tennessee, USA.
- 203 University of Virginia, Charlottesville, Virginia, USA.
- 204 Wayne State University, Detroit, Michigan, USA.
- 205 University of Wisconsin-Madison, Madison, Wisconsin, USA.
- PMID: 31012605
- DOI: 10.1103/PhysRevLett.122.132003
Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at sqrt[s]=13 TeV
Authors
Affiliations
- 1 Yerevan Physics Institute, Yerevan, Armenia.
- 2 Institut für Hochenergiephysik, Wien, Austria.
- 3 Institute for Nuclear Problems, Minsk, Belarus.
- 4 Universiteit Antwerpen, Antwerpen, Belgium.
- 5 Vrije Universiteit Brussel, Brussel, Belgium.
- 6 Université Libre de Bruxelles, Bruxelles, Belgium.
- 7 Ghent University, Ghent, Belgium.
- 8 Université Catholique de Louvain, Louvain-la-Neuve, Belgium.
- 9 Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil.
- 10 Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
- 11 Universidade Estadual Paulista, São Paulo, Brazil.
- 12 Universidade Federal do ABC, São Paulo, Brazil.
- 13 Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria.
- 14 University of Sofia, Sofia, Bulgaria.
- 15 Beihang University, Beijing, China.
- 16 Institute of High Energy Physics, Beijing, China.
- 17 State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.
- 18 Tsinghua University, Beijing, China.
- 19 Universidad de Los Andes, Bogota, Colombia.
- 20 Universidad de Antioquia, Medellin, Colombia.
- 21 University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia.
- 22 University of Split, Faculty of Science, Split, Croatia.
- 23 Institute Rudjer Boskovic, Zagreb, Croatia.
- 24 University of Cyprus, Nicosia, Cyprus.
- 25 Charles University, Prague, Czech Republic.
- 26 Escuela Politecnica Nacional, Quito, Ecuador.
- 27 Universidad San Francisco de Quito, Quito, Ecuador.
- 28 Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt.
- 29 National Institute of Chemical Physics and Biophysics, Tallinn, Estonia.
- 30 Department of Physics, University of Helsinki, Helsinki, Finland.
- 31 Helsinki Institute of Physics, Helsinki, Finland.
- 32 Lappeenranta University of Technology, Lappeenranta, Finland.
- 33 IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France.
- 34 Laboratoire Leprince-Ringuet, Ecole polytechnique, CNRS/IN2P3, Université Paris-Saclay, Palaiseau, France.
- 35 Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France.
- 36 Centre de Calcul de l'Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France.
- 37 Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France.
- 38 Georgian Technical University, Tbilisi, Georgia.
- 39 Tbilisi State University, Tbilisi, Georgia.
- 40 RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany.
- 41 RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany.
- 42 RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany.
- 43 Deutsches Elektronen-Synchrotron, Hamburg, Germany.
- 44 University of Hamburg, Hamburg, Germany.
- 45 Karlsruher Institut fuer Technologie, Karlsruhe, Germany.
- 46 Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece.
- 47 National and Kapodistrian University of Athens, Athens, Greece.
- 48 National Technical University of Athens, Athens, Greece.
- 49 University of Ioánnina, Ioánnina, Greece.
- 50 MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary.
- 51 Wigner Research Centre for Physics, Budapest, Hungary.
- 52 Institute of Nuclear Research ATOMKI, Debrecen, Hungary.
- 53 Institute of Physics, University of Debrecen, Debrecen, Hungary.
- 54 Indian Institute of Science (IISc), Bangalore, India.
- 55 National Institute of Science Education and Research, HBNI, Bhubaneswar, India.
- 56 Panjab University, Chandigarh, India.
- 57 University of Delhi, Delhi, India.
- 58 Saha Institute of Nuclear Physics, HBNI, Kolkata,India.
- 59 Indian Institute of Technology Madras, Madras, India.
- 60 Bhabha Atomic Research Centre, Mumbai, India.
- 61 Tata Institute of Fundamental Research-A, Mumbai, India.
- 62 Tata Institute of Fundamental Research-B, Mumbai, India.
- 63 Indian Institute of Science Education and Research (IISER), Pune, India.
- 64 Institute for Research in Fundamental Sciences (IPM), Tehran, Iran.
- 65 University College Dublin, Dublin, Ireland.
- 66 INFN Sezione di Bari, Bari, Italy.
- 67 Università di Bari, Bari, Italy.
- 68 Politecnico di Bari, Bari, Italy.
- 69 INFN Sezione di Bologna, Bologna, Italy.
- 70 Università di Bologna, Bologna, Italy.
- 71 INFN Sezione di Catania, Catania, Italy.
- 72 Università di Catania, Catania, Italy.
- 73 INFN Sezione di Firenze, Firenze, Italy.
- 74 Università di Firenze, Firenze, Italy.
- 75 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 76 INFN Sezione di Genova, Genova, Italy.
- 77 Università di Genova, Genova, Italy.
- 78 INFN Sezione di Milano-Bicocca, Milano, Italy.
- 79 Università di Milano-Bicocca, Milano, Italy.
- 80 INFN Sezione di Napoli, Napoli, Italy.
- 81 Università della Basilicata, Potenza, Italy.
- 82 Università di Napoli 'Federico II', Napoli, Italy.
- 83 Università G. Marconi, Roma, Italy.
- 84 INFN Sezione di Padova, Padova, Italy.
- 85 Università di Padova, Padova, Italy.
- 86 INFN Sezione di Pavia, Pavia, Italy.
- 87 Università di Pavia, Pavia, Italy.
- 88 INFN Sezione di Perugia, Perugia, Italy.
- 89 Università di Perugia, Perugia, Italy.
- 90 INFN Sezione di Pisa, Pisa, Italy.
- 91 Università di Pisa, Pisa, Italy.
- 92 Scuola Normale Superiore di Pisa, Pisa, Italy.
- 93 INFN Sezione di Roma, Rome, Italy.
- 94 Sapienza Università di Roma, Rome, Italy.
- 95 INFN Sezione di Torino, Torino, Italy.
- 96 Università di Torino, Torino, Italy.
- 97 Università del Piemonte Orientale, Novara, Italy.
- 98 INFN Sezione di Trieste, Trieste, Italy.
- 99 Università di Trieste, Trieste, Italy.
- 100 Kyungpook National University, Daegu, Korea.
- 101 Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea.
- 102 Hanyang University, Seoul, Korea.
- 103 Korea University, Seoul, Korea.
- 104 Sejong University, Seoul, Korea.
- 105 Seoul National University, Seoul, Korea.
- 106 University of Seoul, Seoul, Korea.
- 107 Sungkyunkwan University, Suwon, Korea.
- 108 Riga Technical University, Riga, Latvia.
- 109 Vilnius University, Vilnius, Lithuania.
- 110 National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia.
- 111 Universidad de Sonora (UNISON), Hermosillo, Mexico.
- 112 Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico.
- 113 Universidad Iberoamericana, Mexico City, Mexico.
- 114 Benemerita Universidad Autonoma de Puebla, Puebla, Mexico.
- 115 Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico.
- 116 University of Montenegro, Podgorica, Montenegro.
- 117 University of Auckland, Auckland, New Zealand.
- 118 University of Canterbury, Christchurch, New Zealand.
- 119 National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan.
- 120 National Centre for Nuclear Research, Swierk, Poland.
- 121 Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland.
- 122 Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal.
- 123 Joint Institute for Nuclear Research, Dubna, Russia.
- 124 Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia.
- 125 Institute for Nuclear Research, Moscow, Russia.
- 126 Institute for Theoretical and Experimental Physics, Moscow, Russia.
- 127 Moscow Institute of Physics and Technology, Moscow, Russia.
- 128 National Research Nuclear University 'Moscow Engineering Physics Institute' (MEPhI), Moscow, Russia.
- 129 P.N. Lebedev Physical Institute, Moscow, Russia.
- 130 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia.
- 131 Novosibirsk State University (NSU), Novosibirsk, Russia.
- 132 Institute for High Energy Physics of National Research Centre 'Kurchatov Institute', Protvino, Russia.
- 133 National Research Tomsk Polytechnic University, Tomsk, Russia.
- 134 University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia.
- 135 Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.
- 136 Universidad Autónoma de Madrid, Madrid, Spain.
- 137 Universidad de Oviedo, Oviedo, Spain.
- 138 Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain.
- 139 University of Ruhuna, Department of Physics, Matara, Sri Lanka.
- 140 CERN, European Organization for Nuclear Research, Geneva, Switzerland.
- 141 Paul Scherrer Institut, Villigen, Switzerland.
- 142 ETH Zurich-Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland.
- 143 Universität Zürich, Zurich, Switzerland.
- 144 National Central University, Chung-Li, Taiwan.
- 145 National Taiwan University (NTU), Taipei, Taiwan.
- 146 Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand.
- 147 Çukurova University, Physics Department, Science and Art Faculty, Adana, Turkey.
- 148 Middle East Technical University, Physics Department, Ankara, Turkey.
- 149 Bogazici University, Istanbul, Turkey.
- 150 Istanbul Technical University, Istanbul, Turkey.
- 151 Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov, Ukraine.
- 152 National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine.
- 153 University of Bristol, Bristol, United Kingdom.
- 154 Rutherford Appleton Laboratory, Didcot, United Kingdom.
- 155 Imperial College, London, United Kingdom.
- 156 Brunel University, Uxbridge, United Kingdom.
- 157 Baylor University, Waco, Texas, USA.
- 158 Catholic University of America, Washington, DC, USA.
- 159 The University of Alabama, Tuscaloosa, Alabama, USA.
- 160 Boston University, Boston, Massachusetts, USA.
- 161 Brown University, Providence, Rhode Island, USA.
- 162 University of California, Davis, Davis, California, USA.
- 163 University of California, Los Angeles, California, USA.
- 164 University of California, Riverside, Riverside, California, USA.
- 165 University of California, San Diego, La Jolla, California, USA.
- 166 University of California, Santa Barbara-Department of Physics, Santa Barbara, California, USA.
- 167 California Institute of Technology, Pasadena, California, USA.
- 168 Carnegie Mellon University, Pittsburgh, Pennsylvania, USA.
- 169 University of Colorado Boulder, Boulder, Colorado, USA.
- 170 Cornell University, Ithaca, New York, USA.
- 171 Fermi National Accelerator Laboratory, Batavia, Illinois, USA.
- 172 University of Florida, Gainesville, Florida, USA.
- 173 Florida International University, Miami, Florida, USA.
- 174 Florida State University, Tallahassee, Florida, USA.
- 175 Florida Institute of Technology, Melbourne, Florida, USA.
- 176 University of Illinois at Chicago (UIC), Chicago, Illinois, USA.
- 177 The University of Iowa, Iowa City, Iowa, USA.
- 178 Johns Hopkins University, Baltimore, Maryland, USA.
- 179 The University of Kansas, Lawrence, Kansas, USA.
- 180 Kansas State University, Manhattan, Kansas, USA.
- 181 Lawrence Livermore National Laboratory, Livermore, California, USA.
- 182 University of Maryland, College Park, Maryland, USA.
- 183 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
- 184 University of Minnesota, Minneapolis, Minnesota, USA.
- 185 University of Mississippi, Oxford, Mississippi, USA.
- 186 University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
- 187 State University of New York at Buffalo, Buffalo, New York, USA.
- 188 Northeastern University, Boston, Massachusetts, USA.
- 189 Northwestern University, Evanston, Illinois, USA.
- 190 University of Notre Dame, Notre Dame, Indiana, USA.
- 191 The Ohio State University, Columbus, Ohio, USA.
- 192 Princeton University, Princeton, New Jersey, USA.
- 193 University of Puerto Rico, Mayaguez, Puerto Rico.
- 194 Purdue University, West Lafayette, Indiana, USA.
- 195 Purdue University Northwest, Hammond, Indiana, USA.
- 196 Rice University, Houston, Texas, USA.
- 197 University of Rochester, Rochester, New York, USA.
- 198 Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA.
- 199 University of Tennessee, Knoxville, Tennessee, USA.
- 200 Texas A&M University, College Station, Texas, USA.
- 201 Texas Tech University, Lubbock, Texas, USA.
- 202 Vanderbilt University, Nashville, Tennessee, USA.
- 203 University of Virginia, Charlottesville, Virginia, USA.
- 204 Wayne State University, Detroit, Michigan, USA.
- 205 University of Wisconsin-Madison, Madison, Wisconsin, USA.
- PMID: 31012605
- DOI: 10.1103/PhysRevLett.122.132003
Abstract
The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collected with the CMS detector in 2016 and 2017 and correspond to an integrated luminosity of 77.4fb^{-1}. The increased integrated luminosity, a multivariate lepton identification, and a redesigned analysis strategy improve significantly the sensitivity of the analysis compared to previous searches for tZq production. The tZq signal is observed with a significance well over 5 standard deviations. The measured tZq production cross section is σ(pp→tZq→tℓ^{+}ℓ^{-}q)=111±13(stat)_{-9}^{+11}(syst) fb, for dilepton invariant masses above 30 GeV, in agreement with the standard model expectation.
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