Observation of Medium-Induced Modifications of Jet Fragmentation in Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV Using Isolated Photon-Tagged Jets
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 University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia.
- 21 University of Split, Faculty of Science, Split, Croatia.
- 22 Institute Rudjer Boskovic, Zagreb, Croatia.
- 23 University of Cyprus, Nicosia, Cyprus.
- 24 Charles University, Prague, Czech Republic.
- 25 Universidad San Francisco de Quito, Quito, Ecuador.
- 26 Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt.
- 27 National Institute of Chemical Physics and Biophysics, Tallinn, Estonia.
- 28 Department of Physics, University of Helsinki, Helsinki, Finland.
- 29 Helsinki Institute of Physics, Helsinki, Finland.
- 30 Lappeenranta University of Technology, Lappeenranta, Finland.
- 31 IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France.
- 32 Laboratoire Leprince-Ringuet, Ecole polytechnique, CNRS/IN2P3, Université Paris-Saclay, Palaiseau, France.
- 33 Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France.
- 34 Centre de Calcul de l'Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France.
- 35 Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France.
- 36 Georgian Technical University, Tbilisi, Georgia.
- 37 Tbilisi State University, Tbilisi, Georgia.
- 38 RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany.
- 39 RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany.
- 40 RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany.
- 41 Deutsches Elektronen-Synchrotron, Hamburg, Germany.
- 42 University of Hamburg, Hamburg, Germany.
- 43 Institut für Experimentelle Kernphysik, Karlsruhe, Germany.
- 44 Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece.
- 45 National and Kapodistrian University of Athens, Athens, Greece.
- 46 National Technical University of Athens, Athens, Greece.
- 47 University of Ioánnina, Ioánnina, Greece.
- 48 MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary.
- 49 Wigner Research Centre for Physics, Budapest, Hungary.
- 50 Institute of Nuclear Research ATOMKI, Debrecen, Hungary.
- 51 Institute of Physics, University of Debrecen, Debrecen, Hungary.
- 52 Indian Institute of Science (IISc), Bangalore, India.
- 53 National Institute of Science Education and Research, Bhubaneswar, India.
- 54 Panjab University, Chandigarh, India.
- 55 University of Delhi, Delhi, India.
- 56 Saha Institute of Nuclear Physics, HBNI, Kolkata,India.
- 57 Indian Institute of Technology Madras, Madras, India.
- 58 Bhabha Atomic Research Centre, Mumbai, India.
- 59 Tata Institute of Fundamental Research-A, Mumbai, India.
- 60 Tata Institute of Fundamental Research-B, Mumbai, India.
- 61 Indian Institute of Science Education and Research (IISER), Pune, India.
- 62 Institute for Research in Fundamental Sciences (IPM), Tehran, Iran.
- 63 University College Dublin, Dublin, Ireland.
- 64 INFN Sezione di Bari, Bari, Italy.
- 65 Università di Bari, Bari, Italy.
- 66 Politecnico di Bari, Bari, Italy.
- 67 INFN Sezione di Bologna, Bologna, Italy.
- 68 Università di Bologna, Bologna, Italy.
- 69 INFN Sezione di Catania, Catania, Italy.
- 70 Università di Catania, Catania, Italy.
- 71 INFN Sezione di Firenze, Firenze, Italy.
- 72 Università di Firenze, Firenze, Italy.
- 73 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 74 INFN Sezione di Genova, Genova, Italy.
- 75 Università di Genova, Genova, Italy.
- 76 INFN Sezione di Milano-Bicocca.
- 77 Università di Milano-Bicocca.
- 78 INFN Sezione di Napoli, Napoli, Italy.
- 79 Università della Basilicata, Potenza, Italy.
- 80 Università G. Marconi, Roma, Italy.
- 81 Università di Napoli 'Federico II', Napoli, Italy.
- 82 INFN Sezione di Padova, Padova, Italy.
- 83 Università di Padova, Padova, Italy.
- 84 INFN Sezione di Pavia, Pavia, Italy.
- 85 Università di Pavia, Pavia, Italy.
- 86 INFN Sezione di Perugia, Perugia, Italy.
- 87 Università di Perugia, Perugia, Italy.
- 88 INFN Sezione di Pisa, Pisa, Italy.
- 89 Università di Pisa, Pisa, Italy.
- 90 Scuola Normale Superiore di Pisa, Pisa, Italy.
- 91 INFN Sezione di Roma, Rome, Italy.
- 92 Sapienza Università di Roma, Rome, Italy.
- 93 INFN Sezione di Torino, Torino, Italy.
- 94 Università di Torino, Torino, Italy.
- 95 Università del Piemonte Orientale, Novara, Italy.
- 96 INFN Sezione di Trieste, Trieste, Italy.
- 97 Università di Trieste, Trieste, Italy.
- 98 Kyungpook National University, Daegu, Korea.
- 99 Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea.
- 100 Hanyang University, Seoul, Korea.
- 101 Korea University, Seoul, Korea.
- 102 Seoul National University, Seoul, Korea.
- 103 University of Seoul, Seoul, Korea.
- 104 Sungkyunkwan University, Suwon, Korea.
- 105 Vilnius University, Vilnius, Lithuania.
- 106 National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia.
- 107 Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico.
- 108 Universidad Iberoamericana, Mexico City, Mexico.
- 109 Benemerita Universidad Autonoma de Puebla, Puebla, Mexico.
- 110 Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico.
- 111 University of Auckland, Auckland, New Zealand.
- 112 University of Canterbury, Christchurch, New Zealand.
- 113 National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan.
- 114 National Centre for Nuclear Research, Swierk, Poland.
- 115 Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland.
- 116 Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal.
- 117 Joint Institute for Nuclear Research, Dubna, Russia.
- 118 Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia.
- 119 Institute for Nuclear Research, Moscow, Russia.
- 120 Institute for Theoretical and Experimental Physics, Moscow, Russia.
- 121 Moscow Institute of Physics and Technology, Moscow, Russia.
- 122 National Research Nuclear University 'Moscow Engineering Physics Institute' (MEPhI), Moscow, Russia.
- 123 P.N. Lebedev Physical Institute, Moscow, Russia.
- 124 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia.
- 125 Novosibirsk State University (NSU), Novosibirsk, Russia.
- 126 State Research Center of Russian Federation, Institute for High Energy Physics of NRC "Kurchatov Institute", Protvino, Russia.
- 127 National Research Tomsk Polytechnic University, Tomsk, Russia.
- 128 University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia.
- 129 Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.
- 130 Universidad Autónoma de Madrid, Madrid, Spain.
- 131 Universidad de Oviedo, Oviedo, Spain.
- 132 Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain.
- 133 CERN, European Organization for Nuclear Research, Geneva, Switzerland.
- 134 Paul Scherrer Institut, Villigen, Switzerland.
- 135 ETH Zurich-Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland.
- 136 Universität Zürich, Zurich, Switzerland.
- 137 National Central University, Chung-Li, Taiwan.
- 138 National Taiwan University (NTU), Taipei, Taiwan.
- 139 Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand.
- 140 Çukurova University, Physics Department, Science and Art Faculty, Adana, Turkey.
- 141 Middle East Technical University, Physics Department, Ankara, Turkey.
- 142 Bogazici University, Istanbul, Turkey.
- 143 Istanbul Technical University, Istanbul, Turkey.
- 144 Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov, Ukraine.
- 145 National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, 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 International University, Miami, Florida, USA.
- 167 Florida State University, Tallahassee, Florida, USA.
- 168 Florida Institute of Technology, Melbourne, Florida, USA.
- 169 University of Illinois at Chicago (UIC), Chicago, Illinois, USA.
- 170 The University of Iowa, Iowa City, Iowa, USA.
- 171 Johns Hopkins University, Baltimore, Maryland, USA.
- 172 The University of Kansas, Lawrence, Kansas, USA.
- 173 Kansas State University, Manhattan, Kansas, USA.
- 174 Lawrence Livermore National Laboratory, Livermore, California, USA.
- 175 University of Maryland, College Park, Maryland, USA.
- 176 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
- 177 University of Minnesota, Minneapolis, Minnesota, USA.
- 178 University of Mississippi, Oxford, Mississippi, USA.
- 179 University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
- 180 State University of New York at Buffalo, Buffalo, New York, USA.
- 181 Northeastern University, Boston, Massachusetts, USA.
- 182 Northwestern University, Evanston, Illinois, USA.
- 183 University of Notre Dame, Notre Dame, Indiana, USA.
- 184 The Ohio State University, Columbus, Ohio, USA.
- 185 Princeton University, Princeton, New Jersey, USA.
- 186 University of Puerto Rico, Mayaguez, Puerto Rico.
- 187 Purdue University, West Lafayette, Indiana, USA.
- 188 Purdue University Northwest, Hammond, Indiana, USA.
- 189 Rice University, Houston, Indiana, USA.
- 190 University of Rochester, Rochester, New York, USA.
- 191 The Rockefeller University, New York, USA.
- 192 Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA.
- 193 University of Tennessee, Knoxville, Tennessee, USA.
- 194 Texas A&M University, College Station, Texas, USA.
- 195 Texas Tech University, Lubbock, Texas, USA.
- 196 Vanderbilt University, Nashville, Tennessee, USA.
- 197 University of Virginia, Charlottesville, Virginia, USA.
- 198 Wayne State University, Detroit, Michigan, USA.
- 199 University of Wisconsin-Madison, Madison, Wisconsin, USA.
- PMID: 30608764
- DOI: 10.1103/PhysRevLett.121.242301
Observation of Medium-Induced Modifications of Jet Fragmentation in Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV Using Isolated Photon-Tagged Jets
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 University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia.
- 21 University of Split, Faculty of Science, Split, Croatia.
- 22 Institute Rudjer Boskovic, Zagreb, Croatia.
- 23 University of Cyprus, Nicosia, Cyprus.
- 24 Charles University, Prague, Czech Republic.
- 25 Universidad San Francisco de Quito, Quito, Ecuador.
- 26 Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt.
- 27 National Institute of Chemical Physics and Biophysics, Tallinn, Estonia.
- 28 Department of Physics, University of Helsinki, Helsinki, Finland.
- 29 Helsinki Institute of Physics, Helsinki, Finland.
- 30 Lappeenranta University of Technology, Lappeenranta, Finland.
- 31 IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France.
- 32 Laboratoire Leprince-Ringuet, Ecole polytechnique, CNRS/IN2P3, Université Paris-Saclay, Palaiseau, France.
- 33 Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France.
- 34 Centre de Calcul de l'Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France.
- 35 Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France.
- 36 Georgian Technical University, Tbilisi, Georgia.
- 37 Tbilisi State University, Tbilisi, Georgia.
- 38 RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany.
- 39 RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany.
- 40 RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany.
- 41 Deutsches Elektronen-Synchrotron, Hamburg, Germany.
- 42 University of Hamburg, Hamburg, Germany.
- 43 Institut für Experimentelle Kernphysik, Karlsruhe, Germany.
- 44 Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece.
- 45 National and Kapodistrian University of Athens, Athens, Greece.
- 46 National Technical University of Athens, Athens, Greece.
- 47 University of Ioánnina, Ioánnina, Greece.
- 48 MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary.
- 49 Wigner Research Centre for Physics, Budapest, Hungary.
- 50 Institute of Nuclear Research ATOMKI, Debrecen, Hungary.
- 51 Institute of Physics, University of Debrecen, Debrecen, Hungary.
- 52 Indian Institute of Science (IISc), Bangalore, India.
- 53 National Institute of Science Education and Research, Bhubaneswar, India.
- 54 Panjab University, Chandigarh, India.
- 55 University of Delhi, Delhi, India.
- 56 Saha Institute of Nuclear Physics, HBNI, Kolkata,India.
- 57 Indian Institute of Technology Madras, Madras, India.
- 58 Bhabha Atomic Research Centre, Mumbai, India.
- 59 Tata Institute of Fundamental Research-A, Mumbai, India.
- 60 Tata Institute of Fundamental Research-B, Mumbai, India.
- 61 Indian Institute of Science Education and Research (IISER), Pune, India.
- 62 Institute for Research in Fundamental Sciences (IPM), Tehran, Iran.
- 63 University College Dublin, Dublin, Ireland.
- 64 INFN Sezione di Bari, Bari, Italy.
- 65 Università di Bari, Bari, Italy.
- 66 Politecnico di Bari, Bari, Italy.
- 67 INFN Sezione di Bologna, Bologna, Italy.
- 68 Università di Bologna, Bologna, Italy.
- 69 INFN Sezione di Catania, Catania, Italy.
- 70 Università di Catania, Catania, Italy.
- 71 INFN Sezione di Firenze, Firenze, Italy.
- 72 Università di Firenze, Firenze, Italy.
- 73 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 74 INFN Sezione di Genova, Genova, Italy.
- 75 Università di Genova, Genova, Italy.
- 76 INFN Sezione di Milano-Bicocca.
- 77 Università di Milano-Bicocca.
- 78 INFN Sezione di Napoli, Napoli, Italy.
- 79 Università della Basilicata, Potenza, Italy.
- 80 Università G. Marconi, Roma, Italy.
- 81 Università di Napoli 'Federico II', Napoli, Italy.
- 82 INFN Sezione di Padova, Padova, Italy.
- 83 Università di Padova, Padova, Italy.
- 84 INFN Sezione di Pavia, Pavia, Italy.
- 85 Università di Pavia, Pavia, Italy.
- 86 INFN Sezione di Perugia, Perugia, Italy.
- 87 Università di Perugia, Perugia, Italy.
- 88 INFN Sezione di Pisa, Pisa, Italy.
- 89 Università di Pisa, Pisa, Italy.
- 90 Scuola Normale Superiore di Pisa, Pisa, Italy.
- 91 INFN Sezione di Roma, Rome, Italy.
- 92 Sapienza Università di Roma, Rome, Italy.
- 93 INFN Sezione di Torino, Torino, Italy.
- 94 Università di Torino, Torino, Italy.
- 95 Università del Piemonte Orientale, Novara, Italy.
- 96 INFN Sezione di Trieste, Trieste, Italy.
- 97 Università di Trieste, Trieste, Italy.
- 98 Kyungpook National University, Daegu, Korea.
- 99 Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea.
- 100 Hanyang University, Seoul, Korea.
- 101 Korea University, Seoul, Korea.
- 102 Seoul National University, Seoul, Korea.
- 103 University of Seoul, Seoul, Korea.
- 104 Sungkyunkwan University, Suwon, Korea.
- 105 Vilnius University, Vilnius, Lithuania.
- 106 National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia.
- 107 Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico.
- 108 Universidad Iberoamericana, Mexico City, Mexico.
- 109 Benemerita Universidad Autonoma de Puebla, Puebla, Mexico.
- 110 Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico.
- 111 University of Auckland, Auckland, New Zealand.
- 112 University of Canterbury, Christchurch, New Zealand.
- 113 National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan.
- 114 National Centre for Nuclear Research, Swierk, Poland.
- 115 Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland.
- 116 Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal.
- 117 Joint Institute for Nuclear Research, Dubna, Russia.
- 118 Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia.
- 119 Institute for Nuclear Research, Moscow, Russia.
- 120 Institute for Theoretical and Experimental Physics, Moscow, Russia.
- 121 Moscow Institute of Physics and Technology, Moscow, Russia.
- 122 National Research Nuclear University 'Moscow Engineering Physics Institute' (MEPhI), Moscow, Russia.
- 123 P.N. Lebedev Physical Institute, Moscow, Russia.
- 124 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia.
- 125 Novosibirsk State University (NSU), Novosibirsk, Russia.
- 126 State Research Center of Russian Federation, Institute for High Energy Physics of NRC "Kurchatov Institute", Protvino, Russia.
- 127 National Research Tomsk Polytechnic University, Tomsk, Russia.
- 128 University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia.
- 129 Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.
- 130 Universidad Autónoma de Madrid, Madrid, Spain.
- 131 Universidad de Oviedo, Oviedo, Spain.
- 132 Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain.
- 133 CERN, European Organization for Nuclear Research, Geneva, Switzerland.
- 134 Paul Scherrer Institut, Villigen, Switzerland.
- 135 ETH Zurich-Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland.
- 136 Universität Zürich, Zurich, Switzerland.
- 137 National Central University, Chung-Li, Taiwan.
- 138 National Taiwan University (NTU), Taipei, Taiwan.
- 139 Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand.
- 140 Çukurova University, Physics Department, Science and Art Faculty, Adana, Turkey.
- 141 Middle East Technical University, Physics Department, Ankara, Turkey.
- 142 Bogazici University, Istanbul, Turkey.
- 143 Istanbul Technical University, Istanbul, Turkey.
- 144 Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov, Ukraine.
- 145 National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, 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 International University, Miami, Florida, USA.
- 167 Florida State University, Tallahassee, Florida, USA.
- 168 Florida Institute of Technology, Melbourne, Florida, USA.
- 169 University of Illinois at Chicago (UIC), Chicago, Illinois, USA.
- 170 The University of Iowa, Iowa City, Iowa, USA.
- 171 Johns Hopkins University, Baltimore, Maryland, USA.
- 172 The University of Kansas, Lawrence, Kansas, USA.
- 173 Kansas State University, Manhattan, Kansas, USA.
- 174 Lawrence Livermore National Laboratory, Livermore, California, USA.
- 175 University of Maryland, College Park, Maryland, USA.
- 176 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
- 177 University of Minnesota, Minneapolis, Minnesota, USA.
- 178 University of Mississippi, Oxford, Mississippi, USA.
- 179 University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
- 180 State University of New York at Buffalo, Buffalo, New York, USA.
- 181 Northeastern University, Boston, Massachusetts, USA.
- 182 Northwestern University, Evanston, Illinois, USA.
- 183 University of Notre Dame, Notre Dame, Indiana, USA.
- 184 The Ohio State University, Columbus, Ohio, USA.
- 185 Princeton University, Princeton, New Jersey, USA.
- 186 University of Puerto Rico, Mayaguez, Puerto Rico.
- 187 Purdue University, West Lafayette, Indiana, USA.
- 188 Purdue University Northwest, Hammond, Indiana, USA.
- 189 Rice University, Houston, Indiana, USA.
- 190 University of Rochester, Rochester, New York, USA.
- 191 The Rockefeller University, New York, USA.
- 192 Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA.
- 193 University of Tennessee, Knoxville, Tennessee, USA.
- 194 Texas A&M University, College Station, Texas, USA.
- 195 Texas Tech University, Lubbock, Texas, USA.
- 196 Vanderbilt University, Nashville, Tennessee, USA.
- 197 University of Virginia, Charlottesville, Virginia, USA.
- 198 Wayne State University, Detroit, Michigan, USA.
- 199 University of Wisconsin-Madison, Madison, Wisconsin, USA.
- PMID: 30608764
- DOI: 10.1103/PhysRevLett.121.242301
Abstract
Measurements of fragmentation functions for jets associated with an isolated photon are presented for the first time in pp and Pb-Pb collisions. The analysis uses data collected with the CMS detector at the CERN LHC at a nucleon-nucleon center-of-mass energy of 5.02 TeV. Fragmentation functions are obtained for jets with p_{T}^{jet}>30 GeV/c in events containing an isolated photon with p_{T}^{γ}>60 GeV/c, using charged tracks with transverse momentum p_{T}^{trk}>1 GeV/c in a cone around the jet axis. The association with an isolated photon constrains the initial p_{T} and azimuthal angle of the parton whose shower produced the jet. For central Pb-Pb collisions, modifications of the jet fragmentation functions are observed when compared to those measured in pp collisions, while no significant differences are found in the 50% most peripheral collisions. Jets in central Pb-Pb events show an excess (depletion) of low (high) p_{T} particles, with a transition around 3 GeV/c. This measurement shows for the first time the in-medium shower modifications of partons (quark dominated) with well-defined initial kinematics. It constitutes a new well-controlled reference for testing theoretical models of the parton passage through the quark-gluon plasma.