Observation of τ Lepton Pair Production in Ultraperipheral Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV
Affiliations
- 1 Yerevan Physics Institute, Yerevan, Armenia.
- 2 Institut für Hochenergiephysik, Vienna, Austria.
- 3 Universiteit Antwerpen, Antwerpen, Belgium.
- 4 Vrije Universiteit Brussel, Brussel, Belgium.
- 5 Université Libre de Bruxelles, Bruxelles, Belgium.
- 6 Ghent University, Ghent, Belgium.
- 7 Université Catholique de Louvain, Louvain-la-Neuve, Belgium.
- 8 Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil.
- 9 Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
- 10 Universidade Estadual Paulista, Universidade Federal do ABC, São Paulo, Brazil.
- 11 Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria.
- 12 University of Sofia, Sofia, Bulgaria.
- 13 Beihang University, Beijing, China.
- 14 Department of Physics, Tsinghua University, Beijing, China.
- 15 Institute of High Energy Physics, Beijing, China.
- 16 State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.
- 17 Sun Yat-Sen University, Guangzhou, China.
- 18 Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE)-Fudan University, Shanghai, China.
- 19 Zhejiang University, Hangzhou, Zhejiang, China.
- 20 Universidad de Los Andes, Bogota, Colombia.
- 21 Universidad de Antioquia, Medellin, Colombia.
- 22 University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia.
- 23 University of Split, Faculty of Science, Split, Croatia.
- 24 Institute Rudjer Boskovic, Zagreb, Croatia.
- 25 University of Cyprus, Nicosia, Cyprus.
- 26 Charles University, Prague, Czech Republic.
- 27 Escuela Politecnica Nacional, Quito, Ecuador.
- 28 Universidad San Francisco de Quito, Quito, Ecuador.
- 29 Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt.
- 30 Center for High Energy Physics (CHEP-FU), Fayoum University, El-Fayoum, Egypt.
- 31 National Institute of Chemical Physics and Biophysics, Tallinn, Estonia.
- 32 Department of Physics, University of Helsinki, Helsinki, Finland.
- 33 Helsinki Institute of Physics, Helsinki, Finland.
- 34 Lappeenranta-Lahti University of Technology, Lappeenranta, Finland.
- 35 IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France.
- 36 Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France.
- 37 Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France.
- 38 Institut de Physique des 2 Infinis de Lyon (IP2I), Villeurbanne, France.
- 39 Georgian Technical 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 Karoly Robert Campus, MATE Institute of Technology, Gyongyos, Hungary.
- 55 Panjab University, Chandigarh, India.
- 56 University of Delhi, Delhi, India.
- 57 Saha Institute of Nuclear Physics, HBNI, Kolkata, India.
- 58 Indian Institute of Technology Madras, Madras, India.
- 59 Bhabha Atomic Research Centre, Mumbai, India.
- 60 Tata Institute of Fundamental Research-A, Mumbai, India.
- 61 Tata Institute of Fundamental Research-B, Mumbai, India.
- 62 National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute, Bhubaneswar, Odisha, India.
- 63 Indian Institute of Science Education and Research (IISER), Pune, India.
- 64 Isfahan University of Technology, Isfahan, Iran.
- 65 Institute for Research in Fundamental Sciences (IPM), Tehran, Iran.
- 66 University College Dublin, Dublin, Ireland.
- 67 INFN Sezione di Bari, Bari, Italy.
- 68 Università di Bari, Bari, Italy.
- 69 Politecnico di Bari, Bari, Italy.
- 70 INFN Sezione di Bologna, Bologna, Italy.
- 71 Università di Bologna, Bologna, Italy.
- 72 INFN Sezione di Catania, Catania, Italy.
- 73 Università di Catania, Catania, Italy.
- 74 INFN Sezione di Firenze, Firenze, Italy.
- 75 Università di Firenze, Firenze, Italy.
- 76 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 77 INFN Sezione di Genova, Genova, Italy.
- 78 Università di Genova, Genova, Italy.
- 79 INFN Sezione di Milano-Bicocca, Milano, Italy.
- 80 Università di Milano-Bicocca, Milano, Italy.
- 81 INFN Sezione di Napoli, Napoli, Italy.
- 82 Università di Napoli 'Federico II', Napoli, Italy.
- 83 Università della Basilicata, Potenza, 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 Scuola Normale Superiore di Pisa, Pisa, Italy.
- 92 Università di Pisa, Pisa, Italy.
- 93 Università di Siena, Siena, Italy.
- 94 INFN Sezione di Roma, Roma, Italy.
- 95 Sapienza Università di Roma, Roma, Italy.
- 96 INFN Sezione di Torino, Torino, Italy.
- 97 Università di Torino, Torino, Italy.
- 98 Università del Piemonte Orientale, Novara, Italy.
- 99 INFN Sezione di Trieste, Trieste, Italy.
- 100 Università di Trieste, Trieste, Italy.
- 101 Kyungpook National University, Daegu, Korea.
- 102 Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea.
- 103 Hanyang University, Seoul, Korea.
- 104 Korea University, Seoul, Korea.
- 105 Kyung Hee University, Department of Physics, Seoul, Korea.
- 106 Sejong University, Seoul, Korea.
- 107 Seoul National University, Seoul, Korea.
- 108 University of Seoul, Seoul, Korea.
- 109 Yonsei University, Department of Physics, Seoul, Korea.
- 110 Sungkyunkwan University, Suwon, Korea.
- 111 College of Engineering and Technology, American University of the Middle East (AUM), Dasman, Kuwait.
- 112 Riga Technical University, Riga, Latvia.
- 113 Vilnius University, Vilnius, Lithuania.
- 114 National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia.
- 115 Universidad de Sonora (UNISON), Hermosillo, Mexico.
- 116 Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico.
- 117 Universidad Iberoamericana, Mexico City, Mexico.
- 118 Benemerita Universidad Autonoma de Puebla, Puebla, Mexico.
- 119 University of Montenegro, Podgorica, Montenegro.
- 120 National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan.
- 121 AGH University of Science and Technology Faculty of Computer Science, Electronics and Telecommunications, Krakow, Poland.
- 122 National Centre for Nuclear Research, Swierk, Poland.
- 123 Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland.
- 124 Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal.
- 125 VINCA Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia.
- 126 Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.
- 127 Universidad Autónoma de Madrid, Madrid, Spain.
- 128 Universidad de Oviedo, Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA), Oviedo, Spain.
- 129 Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain.
- 130 University of Colombo, Colombo, Sri Lanka.
- 131 University of Ruhuna, Department of Physics, Matara, Sri Lanka.
- 132 CERN, European Organization for Nuclear Research, Geneva, Switzerland.
- 133 Paul Scherrer Institut, Villigen, Switzerland.
- 134 ETH Zurich-Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland.
- 135 Universität Zürich, Zurich, Switzerland.
- 136 National Central University, Chung-Li, Taiwan.
- 137 National Taiwan University (NTU), Taipei, Taiwan.
- 138 Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand.
- 139 Çukurova University, Physics Department, Science and Art Faculty, Adana, Turkey.
- 140 Middle East Technical University, Physics Department, Ankara, Turkey.
- 141 Bogazici University, Istanbul, Turkey.
- 142 Istanbul Technical University, Istanbul, Turkey.
- 143 Istanbul University, Istanbul, Turkey.
- 144 Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkiv, Ukraine.
- 145 National Science Centre, Kharkiv Institute of Physics and Technology, Kharkiv, Ukraine.
- 146 University of Bristol, Bristol, United Kingdom.
- 147 Rutherford Appleton Laboratory, Didcot, United Kingdom.
- 148 Imperial College, London, United Kingdom.
- 149 Brunel University, Uxbridge, United Kingdom.
- 150 Baylor University, Waco, Texas, USA.
- 151 Catholic University of America, Washington, DC, USA.
- 152 The University of Alabama, Tuscaloosa, Alabama, USA.
- 153 Boston University, Boston, Massachusetts, USA.
- 154 Brown University, Providence, Rhode Island, USA.
- 155 University of California, Davis, Davis, California, USA.
- 156 University of California, Los Angeles, California, USA.
- 157 University of California, Riverside, Riverside, California, USA.
- 158 University of California, San Diego, La Jolla, California, USA.
- 159 University of California, Santa Barbara-Department of Physics, Santa Barbara, California, USA.
- 160 California Institute of Technology, Pasadena, California, USA.
- 161 Carnegie Mellon University, Pittsburgh, Pennsylvania, USA.
- 162 University of Colorado Boulder, Boulder, Colorado, USA.
- 163 Cornell University, Ithaca, New York, USA.
- 164 Fermi National Accelerator Laboratory, Batavia, Illinois, USA.
- 165 University of Florida, Gainesville, Florida, USA.
- 166 Florida State University, Tallahassee, Florida, USA.
- 167 Florida Institute of Technology, Melbourne, Florida, USA.
- 168 University of Illinois at Chicago (UIC), Chicago, Illinois, USA.
- 169 The University of Iowa, Iowa City, Iowa, USA.
- 170 Johns Hopkins University, Baltimore, Maryland, USA.
- 171 The University of Kansas, Lawrence, Kansas, USA.
- 172 Kansas State University, Manhattan, Kansas, USA.
- 173 Lawrence Livermore National Laboratory, Livermore, California, USA.
- 174 University of Maryland, College Park, Maryland, USA.
- 175 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
- 176 University of Minnesota, Minneapolis, Minnesota, USA.
- 177 University of Mississippi, Oxford, Mississippi, USA.
- 178 University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
- 179 State University of New York at Buffalo, Buffalo, New York, USA.
- 180 Northeastern University, Boston, Massachusetts, USA.
- 181 Northwestern University, Evanston, Illinois, USA.
- 182 University of Notre Dame, Notre Dame, Indiana, USA.
- 183 The Ohio State University, Columbus, Ohio, USA.
- 184 Princeton University, Princeton, New Jersey, USA.
- 185 University of Puerto Rico, Mayaguez, Puerto Rico, USA.
- 186 Purdue University, West Lafayette, Indiana, USA.
- 187 Purdue University Northwest, Hammond, Indiana, USA.
- 188 Rice University, Houston, Texas, USA.
- 189 University of Rochester, Rochester, New York, USA.
- 190 The Rockefeller University, New York, New York, USA.
- 191 Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA.
- 192 University of Tennessee, Knoxville, Tennessee, USA.
- 193 Texas A&M University, College Station, Texas, USA.
- 194 Texas Tech University, Lubbock, Texas, USA.
- 195 Vanderbilt University, Nashville, Tennessee, USA.
- 196 University of Virginia, Charlottesville, Virginia, USA.
- 197 Wayne State University, Detroit, Michigan, USA.
- 198 University of Wisconsin-Madison, Madison, Wisconsin, USA.
- 199 An institute or international laboratory covered by a cooperation agreement with CERN.
- PMID: 37897747
- DOI: 10.1103/PhysRevLett.131.151803
Observation of τ Lepton Pair Production in Ultraperipheral Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV
Authors
Affiliations
- 1 Yerevan Physics Institute, Yerevan, Armenia.
- 2 Institut für Hochenergiephysik, Vienna, Austria.
- 3 Universiteit Antwerpen, Antwerpen, Belgium.
- 4 Vrije Universiteit Brussel, Brussel, Belgium.
- 5 Université Libre de Bruxelles, Bruxelles, Belgium.
- 6 Ghent University, Ghent, Belgium.
- 7 Université Catholique de Louvain, Louvain-la-Neuve, Belgium.
- 8 Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil.
- 9 Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
- 10 Universidade Estadual Paulista, Universidade Federal do ABC, São Paulo, Brazil.
- 11 Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria.
- 12 University of Sofia, Sofia, Bulgaria.
- 13 Beihang University, Beijing, China.
- 14 Department of Physics, Tsinghua University, Beijing, China.
- 15 Institute of High Energy Physics, Beijing, China.
- 16 State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.
- 17 Sun Yat-Sen University, Guangzhou, China.
- 18 Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE)-Fudan University, Shanghai, China.
- 19 Zhejiang University, Hangzhou, Zhejiang, China.
- 20 Universidad de Los Andes, Bogota, Colombia.
- 21 Universidad de Antioquia, Medellin, Colombia.
- 22 University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia.
- 23 University of Split, Faculty of Science, Split, Croatia.
- 24 Institute Rudjer Boskovic, Zagreb, Croatia.
- 25 University of Cyprus, Nicosia, Cyprus.
- 26 Charles University, Prague, Czech Republic.
- 27 Escuela Politecnica Nacional, Quito, Ecuador.
- 28 Universidad San Francisco de Quito, Quito, Ecuador.
- 29 Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt.
- 30 Center for High Energy Physics (CHEP-FU), Fayoum University, El-Fayoum, Egypt.
- 31 National Institute of Chemical Physics and Biophysics, Tallinn, Estonia.
- 32 Department of Physics, University of Helsinki, Helsinki, Finland.
- 33 Helsinki Institute of Physics, Helsinki, Finland.
- 34 Lappeenranta-Lahti University of Technology, Lappeenranta, Finland.
- 35 IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France.
- 36 Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France.
- 37 Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France.
- 38 Institut de Physique des 2 Infinis de Lyon (IP2I), Villeurbanne, France.
- 39 Georgian Technical 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 Karoly Robert Campus, MATE Institute of Technology, Gyongyos, Hungary.
- 55 Panjab University, Chandigarh, India.
- 56 University of Delhi, Delhi, India.
- 57 Saha Institute of Nuclear Physics, HBNI, Kolkata, India.
- 58 Indian Institute of Technology Madras, Madras, India.
- 59 Bhabha Atomic Research Centre, Mumbai, India.
- 60 Tata Institute of Fundamental Research-A, Mumbai, India.
- 61 Tata Institute of Fundamental Research-B, Mumbai, India.
- 62 National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute, Bhubaneswar, Odisha, India.
- 63 Indian Institute of Science Education and Research (IISER), Pune, India.
- 64 Isfahan University of Technology, Isfahan, Iran.
- 65 Institute for Research in Fundamental Sciences (IPM), Tehran, Iran.
- 66 University College Dublin, Dublin, Ireland.
- 67 INFN Sezione di Bari, Bari, Italy.
- 68 Università di Bari, Bari, Italy.
- 69 Politecnico di Bari, Bari, Italy.
- 70 INFN Sezione di Bologna, Bologna, Italy.
- 71 Università di Bologna, Bologna, Italy.
- 72 INFN Sezione di Catania, Catania, Italy.
- 73 Università di Catania, Catania, Italy.
- 74 INFN Sezione di Firenze, Firenze, Italy.
- 75 Università di Firenze, Firenze, Italy.
- 76 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 77 INFN Sezione di Genova, Genova, Italy.
- 78 Università di Genova, Genova, Italy.
- 79 INFN Sezione di Milano-Bicocca, Milano, Italy.
- 80 Università di Milano-Bicocca, Milano, Italy.
- 81 INFN Sezione di Napoli, Napoli, Italy.
- 82 Università di Napoli 'Federico II', Napoli, Italy.
- 83 Università della Basilicata, Potenza, 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 Scuola Normale Superiore di Pisa, Pisa, Italy.
- 92 Università di Pisa, Pisa, Italy.
- 93 Università di Siena, Siena, Italy.
- 94 INFN Sezione di Roma, Roma, Italy.
- 95 Sapienza Università di Roma, Roma, Italy.
- 96 INFN Sezione di Torino, Torino, Italy.
- 97 Università di Torino, Torino, Italy.
- 98 Università del Piemonte Orientale, Novara, Italy.
- 99 INFN Sezione di Trieste, Trieste, Italy.
- 100 Università di Trieste, Trieste, Italy.
- 101 Kyungpook National University, Daegu, Korea.
- 102 Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea.
- 103 Hanyang University, Seoul, Korea.
- 104 Korea University, Seoul, Korea.
- 105 Kyung Hee University, Department of Physics, Seoul, Korea.
- 106 Sejong University, Seoul, Korea.
- 107 Seoul National University, Seoul, Korea.
- 108 University of Seoul, Seoul, Korea.
- 109 Yonsei University, Department of Physics, Seoul, Korea.
- 110 Sungkyunkwan University, Suwon, Korea.
- 111 College of Engineering and Technology, American University of the Middle East (AUM), Dasman, Kuwait.
- 112 Riga Technical University, Riga, Latvia.
- 113 Vilnius University, Vilnius, Lithuania.
- 114 National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia.
- 115 Universidad de Sonora (UNISON), Hermosillo, Mexico.
- 116 Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico.
- 117 Universidad Iberoamericana, Mexico City, Mexico.
- 118 Benemerita Universidad Autonoma de Puebla, Puebla, Mexico.
- 119 University of Montenegro, Podgorica, Montenegro.
- 120 National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan.
- 121 AGH University of Science and Technology Faculty of Computer Science, Electronics and Telecommunications, Krakow, Poland.
- 122 National Centre for Nuclear Research, Swierk, Poland.
- 123 Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland.
- 124 Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal.
- 125 VINCA Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia.
- 126 Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.
- 127 Universidad Autónoma de Madrid, Madrid, Spain.
- 128 Universidad de Oviedo, Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA), Oviedo, Spain.
- 129 Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain.
- 130 University of Colombo, Colombo, Sri Lanka.
- 131 University of Ruhuna, Department of Physics, Matara, Sri Lanka.
- 132 CERN, European Organization for Nuclear Research, Geneva, Switzerland.
- 133 Paul Scherrer Institut, Villigen, Switzerland.
- 134 ETH Zurich-Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland.
- 135 Universität Zürich, Zurich, Switzerland.
- 136 National Central University, Chung-Li, Taiwan.
- 137 National Taiwan University (NTU), Taipei, Taiwan.
- 138 Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand.
- 139 Çukurova University, Physics Department, Science and Art Faculty, Adana, Turkey.
- 140 Middle East Technical University, Physics Department, Ankara, Turkey.
- 141 Bogazici University, Istanbul, Turkey.
- 142 Istanbul Technical University, Istanbul, Turkey.
- 143 Istanbul University, Istanbul, Turkey.
- 144 Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkiv, Ukraine.
- 145 National Science Centre, Kharkiv Institute of Physics and Technology, Kharkiv, Ukraine.
- 146 University of Bristol, Bristol, United Kingdom.
- 147 Rutherford Appleton Laboratory, Didcot, United Kingdom.
- 148 Imperial College, London, United Kingdom.
- 149 Brunel University, Uxbridge, United Kingdom.
- 150 Baylor University, Waco, Texas, USA.
- 151 Catholic University of America, Washington, DC, USA.
- 152 The University of Alabama, Tuscaloosa, Alabama, USA.
- 153 Boston University, Boston, Massachusetts, USA.
- 154 Brown University, Providence, Rhode Island, USA.
- 155 University of California, Davis, Davis, California, USA.
- 156 University of California, Los Angeles, California, USA.
- 157 University of California, Riverside, Riverside, California, USA.
- 158 University of California, San Diego, La Jolla, California, USA.
- 159 University of California, Santa Barbara-Department of Physics, Santa Barbara, California, USA.
- 160 California Institute of Technology, Pasadena, California, USA.
- 161 Carnegie Mellon University, Pittsburgh, Pennsylvania, USA.
- 162 University of Colorado Boulder, Boulder, Colorado, USA.
- 163 Cornell University, Ithaca, New York, USA.
- 164 Fermi National Accelerator Laboratory, Batavia, Illinois, USA.
- 165 University of Florida, Gainesville, Florida, USA.
- 166 Florida State University, Tallahassee, Florida, USA.
- 167 Florida Institute of Technology, Melbourne, Florida, USA.
- 168 University of Illinois at Chicago (UIC), Chicago, Illinois, USA.
- 169 The University of Iowa, Iowa City, Iowa, USA.
- 170 Johns Hopkins University, Baltimore, Maryland, USA.
- 171 The University of Kansas, Lawrence, Kansas, USA.
- 172 Kansas State University, Manhattan, Kansas, USA.
- 173 Lawrence Livermore National Laboratory, Livermore, California, USA.
- 174 University of Maryland, College Park, Maryland, USA.
- 175 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
- 176 University of Minnesota, Minneapolis, Minnesota, USA.
- 177 University of Mississippi, Oxford, Mississippi, USA.
- 178 University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
- 179 State University of New York at Buffalo, Buffalo, New York, USA.
- 180 Northeastern University, Boston, Massachusetts, USA.
- 181 Northwestern University, Evanston, Illinois, USA.
- 182 University of Notre Dame, Notre Dame, Indiana, USA.
- 183 The Ohio State University, Columbus, Ohio, USA.
- 184 Princeton University, Princeton, New Jersey, USA.
- 185 University of Puerto Rico, Mayaguez, Puerto Rico, USA.
- 186 Purdue University, West Lafayette, Indiana, USA.
- 187 Purdue University Northwest, Hammond, Indiana, USA.
- 188 Rice University, Houston, Texas, USA.
- 189 University of Rochester, Rochester, New York, USA.
- 190 The Rockefeller University, New York, New York, USA.
- 191 Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA.
- 192 University of Tennessee, Knoxville, Tennessee, USA.
- 193 Texas A&M University, College Station, Texas, USA.
- 194 Texas Tech University, Lubbock, Texas, USA.
- 195 Vanderbilt University, Nashville, Tennessee, USA.
- 196 University of Virginia, Charlottesville, Virginia, USA.
- 197 Wayne State University, Detroit, Michigan, USA.
- 198 University of Wisconsin-Madison, Madison, Wisconsin, USA.
- 199 An institute or international laboratory covered by a cooperation agreement with CERN.
- PMID: 37897747
- DOI: 10.1103/PhysRevLett.131.151803
Abstract
We present an observation of photon-photon production of τ lepton pairs in ultraperipheral lead-lead collisions. The measurement is based on a data sample with an integrated luminosity of 404 μb^{-1} collected by the CMS experiment at a center-of-mass energy per nucleon pair of sqrt[s_{NN}]=5.02 TeV. The γγ→τ^{+}τ^{-} process is observed for τ^{+}τ^{-} events with a muon and three charged hadrons in the final state. The measured fiducial cross section is σ(γγ→τ^{+}τ^{-})=4.8±0.6(stat)±0.5(syst) μb, where the second (third) term corresponds to the statistical (systematic) uncertainty in σ(γγ→τ^{+}τ^{-}) in agreement with leading-order QED predictions. Using σ(γγ→τ^{+}τ^{-}), we estimate a model-dependent value of the anomalous magnetic moment of the τ lepton of a_{τ}=0.001_{-0.089}^{+0.055}.