Measurement of the Bs(0)→μ+ μ- branching fraction and search for B(0)→μ+ μ- with the CMS experiment
Affiliations
- 1 Yerevan Physics Institute, Yerevan, Armenia.
- 2 Institut für Hochenergiephysik der OeAW, Wien, Austria.
- 3 National Centre for Particle and High Energy Physics, 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 Université de Mons, Mons, Belgium.
- 10 Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil.
- 11 Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
- 12 Universidade Federal do ABC, São Paulo, Brazil.
- 13 Universidade Estadual Paulista, São Paulo, Brazil.
- 14 Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria.
- 15 University of Sofia, Sofia, Bulgaria.
- 16 Institute of High Energy Physics, Beijing, China.
- 17 State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.
- 18 Universidad de Los Andes, Bogota, Colombia.
- 19 Technical University of Split, Split, Croatia.
- 20 University of Split, Split, Croatia.
- 21 Institute Rudjer Boskovic, Zagreb, Croatia.
- 22 University of Cyprus, Nicosia, Cyprus.
- 23 Charles University, Prague, Czech Republic.
- 24 Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt.
- 25 National Institute of Chemical Physics and Biophysics, Tallinn, Estonia.
- 26 Department of Physics, University of Helsinki, Helsinki, Finland.
- 27 Helsinki Institute of Physics, Helsinki, Finland.
- 28 Lappeenranta University of Technology, Lappeenranta, Finland.
- 29 DSM/IRFU, CEA/Saclay, Gif-sur-Yvette, France.
- 30 Laboratoire Leprince-Ringuet, Ecole Polytechnique, IN2P3-CNRS, Palaiseau, France.
- 31 Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Université de Haute Alsace Mulhouse, CNRS/IN2P3, Strasbourg, France.
- 32 Centre de Calcul de l'Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France.
- 33 Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France.
- 34 Institute of High Energy Physics and Informatization, Tbilisi State University, Tbilisi, Georgia.
- 35 RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany.
- 36 RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany.
- 37 RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany.
- 38 Deutsches Elektronen-Synchrotron, Hamburg, Germany.
- 39 University of Hamburg, Hamburg, Germany.
- 40 Institut für Experimentelle Kernphysik, Karlsruhe, Germany.
- 41 Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece.
- 42 University of Athens, Athens, Greece.
- 43 University of Ioánnina, Ioánnina, Greece.
- 44 KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary.
- 45 Institute of Nuclear Research ATOMKI, Debrecen, Hungary.
- 46 University of Debrecen, Debrecen, Hungary.
- 47 National Institute of Science Education and Research, Bhubaneswar, India.
- 48 Panjab University, Chandigarh, India.
- 49 University of Delhi, Delhi, India.
- 50 Saha Institute of Nuclear Physics, Kolkata, India.
- 51 Bhabha Atomic Research Centre, Mumbai, India.
- 52 Tata Institute of Fundamental Research-EHEP, Mumbai, India.
- 53 Tata Institute of Fundamental Research-HECR, Mumbai, India.
- 54 Institute for Research in Fundamental Sciences (IPM), Tehran, Iran.
- 55 University College Dublin, Dublin, Ireland.
- 56 INFN Sezione di Bari, Bari, Italy and Università di Bari, Bari, Italy.
- 57 INFN Sezione di Bari, Bari, Italy.
- 58 INFN Sezione di Bari, Bari, Italy and Politecnico di Bari, Bari, Italy.
- 59 INFN Sezione di Bologna, Bologna, Italy.
- 60 INFN Sezione di Bologna, Bologna, Italy and Università di Bologna, Bologna, Italy.
- 61 INFN Sezione di Catania, Catania, Italy and Università di Catania, Catania, Italy.
- 62 INFN Sezione di Catania, Catania, Italy.
- 63 INFN Sezione di Firenze, Firenze, Italy.
- 64 INFN Sezione di Firenze, Firenze, Italy and Università di Firenze, Firenze, Italy.
- 65 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 66 INFN Sezione di Genova, Genova, Italy.
- 67 INFN Sezione di Genova, Genova, Italy and Università di Genova, Genova, Italy.
- 68 INFN Sezione di Milano-Bicocca, Milano, Italy.
- 69 INFN Sezione di Milano-Bicocca, Milano, Italy and Università di Milano-Bicocca, Milano, Italy.
- 70 INFN Sezione di Napoli, Napoli, Italy.
- 71 INFN Sezione di Napoli, Napoli, Italy and Università della Basilicata (Potenza), Napoli, Italy.
- 72 INFN Sezione di Napoli, Napoli, Italy and Università di Napoli "Federico II," Napoli, Italy.
- 73 INFN Sezione di Napoli, Napoli, Italy and Università G. Marconi (Roma), Napoli, Italy.
- 74 INFN Sezione di Padova, Padova, Italy.
- 75 INFN Sezione di Padova, Padova, Italy and Università di Padova, Padova, Italy.
- 76 INFN Sezione di Padova, Padova, Italy and Università di Trento (Trento), Padova, Italy.
- 77 INFN Sezione di Pavia, Pavia, Italy and Università di Pavia, Pavia, Italy.
- 78 INFN Sezione di Perugia, Perugia, Italy and Università di Perugia, Perugia, Italy.
- 79 INFN Sezione di Perugia, Perugia, Italy.
- 80 INFN Sezione di Pisa, Pisa, Italy.
- 81 INFN Sezione di Pisa, Pisa, Italy and Scuola Normale Superiore di Pisa, Pisa, Italy.
- 82 INFN Sezione di Pisa, Pisa, Italy and Università di Pisa, Pisa, Italy.
- 83 INFN Sezione di Roma, Roma, Italy and Università di Roma, Roma, Italy.
- 84 INFN Sezione di Roma, Roma, Italy.
- 85 INFN Sezione di Torino, Torino, Italy and Università di Torino, Torino, Italy.
- 86 INFN Sezione di Torino, Torino, Italy and Università del Piemonte Orientale (Novara), Torino, Italy.
- 87 INFN Sezione di Torino, Torino, Italy.
- 88 INFN Sezione di Trieste, Trieste, Italy.
- 89 INFN Sezione di Trieste, Trieste, Italy and Università di Trieste, Trieste, Italy.
- 90 Kangwon National University, Chunchon, Korea.
- 91 Kyungpook National University, Daegu, Korea.
- 92 Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea.
- 93 Korea University, Seoul, Korea.
- 94 University of Seoul, Seoul, Korea.
- 95 Sungkyunkwan University, Suwon, Korea.
- 96 Vilnius University, Vilnius, Lithuania.
- 97 Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico.
- 98 Universidad Iberoamericana, Mexico City, Mexico.
- 99 Benemerita Universidad Autonoma de Puebla, Puebla, Mexico.
- 100 Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico.
- 101 University of Auckland, Auckland, New Zealand.
- 102 University of Canterbury, Christchurch, New Zealand.
- 103 National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan.
- 104 National Centre for Nuclear Research, Swierk, Poland.
- 105 Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland.
- 106 Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal.
- 107 Joint Institute for Nuclear Research, Dubna, Russia.
- 108 Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia.
- 109 Institute for Nuclear Research, Moscow, Russia.
- 110 Institute for Theoretical and Experimental Physics, Moscow, Russia.
- 111 P.N. Lebedev Physical Institute, Moscow, Russia.
- 112 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia.
- 113 State Research Center of Russian Federation, Institute for High Energy Physics, Protvino, Russia.
- 114 University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia.
- 115 Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.
- 116 Universidad Autónoma de Madrid, Madrid, Spain.
- 117 Universidad de Oviedo, Oviedo, Spain.
- 118 Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain.
- 119 CERN, European Organization for Nuclear Research, Geneva, Switzerland.
- 120 Paul Scherrer Institut, Villigen, Switzerland.
- 121 Institute for Particle Physics, ETH Zurich, Zurich, Switzerland.
- 122 Universität Zürich, Zurich, Switzerland.
- 123 National Central University, Chung-Li, Taiwan.
- 124 National Taiwan University (NTU), Taipei, Taiwan.
- 125 Chulalongkorn University, Bangkok, Thailand.
- 126 Cukurova University, Adana, Turkey.
- 127 Middle East Technical University, Physics Department, Ankara, Turkey.
- 128 Bogazici University, Istanbul, Turkey.
- 129 Istanbul Technical University, Istanbul, Turkey.
- 130 National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine.
- 131 University of Bristol, Bristol, United Kingdom.
- 132 Rutherford Appleton Laboratory, Didcot, United Kingdom.
- 133 Imperial College, London, United Kingdom.
- 134 Brunel University, Uxbridge, United Kingdom.
- 135 Baylor University, Waco, Texas 76706, USA.
- 136 The University of Alabama, Tuscaloosa, Alabama 35487, USA.
- 137 Boston University, Boston, Massachusetts 02215, USA.
- 138 Brown University, Providence, Rhode Island 02912, USA.
- 139 University of California, Davis, Davis, California 95616, USA.
- 140 University of California, Los Angeles, Los Angeles, California 90095, USA.
- 141 University of California, Riverside, Riverside, California 92521, USA.
- 142 University of California, San Diego, La Jolla, California 92093, USA.
- 143 University of California, Santa Barbara, Santa Barbara, California 93106, USA.
- 144 California Institute of Technology, Pasadena, California 91125, USA.
- 145 Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
- 146 University of Colorado at Boulder, Boulder, Colorado 80309, USA.
- 147 Cornell University, Ithaca, New York 14853, USA.
- 148 Fairfield University, Fairfield, Connecticut 06824, USA.
- 149 Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
- 150 University of Florida, Gainesville, Florida 32611, USA.
- 151 Florida International University, Miami, Florida 33199, USA.
- 152 Florida State University, Tallahassee, Florida 32306, USA.
- 153 Florida Institute of Technology, Melbourne, Florida 32901, USA.
- 154 University of Illinois at Chicago (UIC), Chicago, Illinois 60607, USA.
- 155 The University of Iowa, Iowa City, Iowa 52242, USA.
- 156 Johns Hopkins University, Baltimore, Maryland 21218, USA.
- 157 The University of Kansas, Lawrence, Kansas 66045, USA.
- 158 Kansas State University, Manhattan, Kansas 66506, USA.
- 159 Lawrence Livermore National Laboratory, Livermore, California 94720, USA.
- 160 University of Maryland, College Park, Maryland 20742, USA.
- 161 Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
- 162 University of Minnesota, Minneapolis, Minnesota 55455, USA.
- 163 University of Mississippi, Oxford, Mississippi 38655, USA.
- 164 University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA.
- 165 State University of New York at Buffalo, Buffalo, New York 14260, USA.
- 166 Northeastern University, Boston, Massachusetts 02115, USA.
- 167 Northwestern University, Evanston, Illinois 60208, USA.
- 168 University of Notre Dame, Notre Dame, Indiana 46556, USA.
- 169 The Ohio State University, Columbus, Ohio 43210, USA.
- 170 Princeton University, Princeton, New Jersey 08544, USA.
- 171 University of Puerto Rico, Mayaguez, Puerto Rico 00680.
- 172 Purdue University, West Lafayette, Indiana 47907, USA.
- 173 Purdue University Calumet, Hammond, Indiana 46323, USA.
- 174 Rice University, Houston, Texas 77251, USA.
- 175 University of Rochester, Rochester, New York 14627, USA.
- 176 The Rockefeller University, New York, New York 10021, USA.
- 177 Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA.
- 178 University of Tennessee, Knoxville, Tennessee 37996, USA.
- 179 Texas A&M University, College Station, Texas 77843, USA.
- 180 Texas Tech University, Lubbock, Texas 79409, USA.
- 181 Vanderbilt University, Nashville, Tennessee 37235, USA.
- 182 University of Virginia, Charlottesville, Virginia 22901, USA.
- 183 Wayne State University, Detroit, Michigan 48202, USA.
- 184 University of Wisconsin, Madison, Wisconsin 53706, USA.
- PMID: 25166654
- DOI: 10.1103/PhysRevLett.111.101804
Measurement of the Bs(0)→μ+ μ- branching fraction and search for B(0)→μ+ μ- with the CMS experiment
Authors
Affiliations
- 1 Yerevan Physics Institute, Yerevan, Armenia.
- 2 Institut für Hochenergiephysik der OeAW, Wien, Austria.
- 3 National Centre for Particle and High Energy Physics, 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 Université de Mons, Mons, Belgium.
- 10 Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil.
- 11 Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
- 12 Universidade Federal do ABC, São Paulo, Brazil.
- 13 Universidade Estadual Paulista, São Paulo, Brazil.
- 14 Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria.
- 15 University of Sofia, Sofia, Bulgaria.
- 16 Institute of High Energy Physics, Beijing, China.
- 17 State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.
- 18 Universidad de Los Andes, Bogota, Colombia.
- 19 Technical University of Split, Split, Croatia.
- 20 University of Split, Split, Croatia.
- 21 Institute Rudjer Boskovic, Zagreb, Croatia.
- 22 University of Cyprus, Nicosia, Cyprus.
- 23 Charles University, Prague, Czech Republic.
- 24 Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt.
- 25 National Institute of Chemical Physics and Biophysics, Tallinn, Estonia.
- 26 Department of Physics, University of Helsinki, Helsinki, Finland.
- 27 Helsinki Institute of Physics, Helsinki, Finland.
- 28 Lappeenranta University of Technology, Lappeenranta, Finland.
- 29 DSM/IRFU, CEA/Saclay, Gif-sur-Yvette, France.
- 30 Laboratoire Leprince-Ringuet, Ecole Polytechnique, IN2P3-CNRS, Palaiseau, France.
- 31 Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Université de Haute Alsace Mulhouse, CNRS/IN2P3, Strasbourg, France.
- 32 Centre de Calcul de l'Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France.
- 33 Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France.
- 34 Institute of High Energy Physics and Informatization, Tbilisi State University, Tbilisi, Georgia.
- 35 RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany.
- 36 RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany.
- 37 RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany.
- 38 Deutsches Elektronen-Synchrotron, Hamburg, Germany.
- 39 University of Hamburg, Hamburg, Germany.
- 40 Institut für Experimentelle Kernphysik, Karlsruhe, Germany.
- 41 Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece.
- 42 University of Athens, Athens, Greece.
- 43 University of Ioánnina, Ioánnina, Greece.
- 44 KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary.
- 45 Institute of Nuclear Research ATOMKI, Debrecen, Hungary.
- 46 University of Debrecen, Debrecen, Hungary.
- 47 National Institute of Science Education and Research, Bhubaneswar, India.
- 48 Panjab University, Chandigarh, India.
- 49 University of Delhi, Delhi, India.
- 50 Saha Institute of Nuclear Physics, Kolkata, India.
- 51 Bhabha Atomic Research Centre, Mumbai, India.
- 52 Tata Institute of Fundamental Research-EHEP, Mumbai, India.
- 53 Tata Institute of Fundamental Research-HECR, Mumbai, India.
- 54 Institute for Research in Fundamental Sciences (IPM), Tehran, Iran.
- 55 University College Dublin, Dublin, Ireland.
- 56 INFN Sezione di Bari, Bari, Italy and Università di Bari, Bari, Italy.
- 57 INFN Sezione di Bari, Bari, Italy.
- 58 INFN Sezione di Bari, Bari, Italy and Politecnico di Bari, Bari, Italy.
- 59 INFN Sezione di Bologna, Bologna, Italy.
- 60 INFN Sezione di Bologna, Bologna, Italy and Università di Bologna, Bologna, Italy.
- 61 INFN Sezione di Catania, Catania, Italy and Università di Catania, Catania, Italy.
- 62 INFN Sezione di Catania, Catania, Italy.
- 63 INFN Sezione di Firenze, Firenze, Italy.
- 64 INFN Sezione di Firenze, Firenze, Italy and Università di Firenze, Firenze, Italy.
- 65 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 66 INFN Sezione di Genova, Genova, Italy.
- 67 INFN Sezione di Genova, Genova, Italy and Università di Genova, Genova, Italy.
- 68 INFN Sezione di Milano-Bicocca, Milano, Italy.
- 69 INFN Sezione di Milano-Bicocca, Milano, Italy and Università di Milano-Bicocca, Milano, Italy.
- 70 INFN Sezione di Napoli, Napoli, Italy.
- 71 INFN Sezione di Napoli, Napoli, Italy and Università della Basilicata (Potenza), Napoli, Italy.
- 72 INFN Sezione di Napoli, Napoli, Italy and Università di Napoli "Federico II," Napoli, Italy.
- 73 INFN Sezione di Napoli, Napoli, Italy and Università G. Marconi (Roma), Napoli, Italy.
- 74 INFN Sezione di Padova, Padova, Italy.
- 75 INFN Sezione di Padova, Padova, Italy and Università di Padova, Padova, Italy.
- 76 INFN Sezione di Padova, Padova, Italy and Università di Trento (Trento), Padova, Italy.
- 77 INFN Sezione di Pavia, Pavia, Italy and Università di Pavia, Pavia, Italy.
- 78 INFN Sezione di Perugia, Perugia, Italy and Università di Perugia, Perugia, Italy.
- 79 INFN Sezione di Perugia, Perugia, Italy.
- 80 INFN Sezione di Pisa, Pisa, Italy.
- 81 INFN Sezione di Pisa, Pisa, Italy and Scuola Normale Superiore di Pisa, Pisa, Italy.
- 82 INFN Sezione di Pisa, Pisa, Italy and Università di Pisa, Pisa, Italy.
- 83 INFN Sezione di Roma, Roma, Italy and Università di Roma, Roma, Italy.
- 84 INFN Sezione di Roma, Roma, Italy.
- 85 INFN Sezione di Torino, Torino, Italy and Università di Torino, Torino, Italy.
- 86 INFN Sezione di Torino, Torino, Italy and Università del Piemonte Orientale (Novara), Torino, Italy.
- 87 INFN Sezione di Torino, Torino, Italy.
- 88 INFN Sezione di Trieste, Trieste, Italy.
- 89 INFN Sezione di Trieste, Trieste, Italy and Università di Trieste, Trieste, Italy.
- 90 Kangwon National University, Chunchon, Korea.
- 91 Kyungpook National University, Daegu, Korea.
- 92 Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea.
- 93 Korea University, Seoul, Korea.
- 94 University of Seoul, Seoul, Korea.
- 95 Sungkyunkwan University, Suwon, Korea.
- 96 Vilnius University, Vilnius, Lithuania.
- 97 Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico.
- 98 Universidad Iberoamericana, Mexico City, Mexico.
- 99 Benemerita Universidad Autonoma de Puebla, Puebla, Mexico.
- 100 Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico.
- 101 University of Auckland, Auckland, New Zealand.
- 102 University of Canterbury, Christchurch, New Zealand.
- 103 National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan.
- 104 National Centre for Nuclear Research, Swierk, Poland.
- 105 Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland.
- 106 Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal.
- 107 Joint Institute for Nuclear Research, Dubna, Russia.
- 108 Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia.
- 109 Institute for Nuclear Research, Moscow, Russia.
- 110 Institute for Theoretical and Experimental Physics, Moscow, Russia.
- 111 P.N. Lebedev Physical Institute, Moscow, Russia.
- 112 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia.
- 113 State Research Center of Russian Federation, Institute for High Energy Physics, Protvino, Russia.
- 114 University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia.
- 115 Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.
- 116 Universidad Autónoma de Madrid, Madrid, Spain.
- 117 Universidad de Oviedo, Oviedo, Spain.
- 118 Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain.
- 119 CERN, European Organization for Nuclear Research, Geneva, Switzerland.
- 120 Paul Scherrer Institut, Villigen, Switzerland.
- 121 Institute for Particle Physics, ETH Zurich, Zurich, Switzerland.
- 122 Universität Zürich, Zurich, Switzerland.
- 123 National Central University, Chung-Li, Taiwan.
- 124 National Taiwan University (NTU), Taipei, Taiwan.
- 125 Chulalongkorn University, Bangkok, Thailand.
- 126 Cukurova University, Adana, Turkey.
- 127 Middle East Technical University, Physics Department, Ankara, Turkey.
- 128 Bogazici University, Istanbul, Turkey.
- 129 Istanbul Technical University, Istanbul, Turkey.
- 130 National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine.
- 131 University of Bristol, Bristol, United Kingdom.
- 132 Rutherford Appleton Laboratory, Didcot, United Kingdom.
- 133 Imperial College, London, United Kingdom.
- 134 Brunel University, Uxbridge, United Kingdom.
- 135 Baylor University, Waco, Texas 76706, USA.
- 136 The University of Alabama, Tuscaloosa, Alabama 35487, USA.
- 137 Boston University, Boston, Massachusetts 02215, USA.
- 138 Brown University, Providence, Rhode Island 02912, USA.
- 139 University of California, Davis, Davis, California 95616, USA.
- 140 University of California, Los Angeles, Los Angeles, California 90095, USA.
- 141 University of California, Riverside, Riverside, California 92521, USA.
- 142 University of California, San Diego, La Jolla, California 92093, USA.
- 143 University of California, Santa Barbara, Santa Barbara, California 93106, USA.
- 144 California Institute of Technology, Pasadena, California 91125, USA.
- 145 Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
- 146 University of Colorado at Boulder, Boulder, Colorado 80309, USA.
- 147 Cornell University, Ithaca, New York 14853, USA.
- 148 Fairfield University, Fairfield, Connecticut 06824, USA.
- 149 Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
- 150 University of Florida, Gainesville, Florida 32611, USA.
- 151 Florida International University, Miami, Florida 33199, USA.
- 152 Florida State University, Tallahassee, Florida 32306, USA.
- 153 Florida Institute of Technology, Melbourne, Florida 32901, USA.
- 154 University of Illinois at Chicago (UIC), Chicago, Illinois 60607, USA.
- 155 The University of Iowa, Iowa City, Iowa 52242, USA.
- 156 Johns Hopkins University, Baltimore, Maryland 21218, USA.
- 157 The University of Kansas, Lawrence, Kansas 66045, USA.
- 158 Kansas State University, Manhattan, Kansas 66506, USA.
- 159 Lawrence Livermore National Laboratory, Livermore, California 94720, USA.
- 160 University of Maryland, College Park, Maryland 20742, USA.
- 161 Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
- 162 University of Minnesota, Minneapolis, Minnesota 55455, USA.
- 163 University of Mississippi, Oxford, Mississippi 38655, USA.
- 164 University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA.
- 165 State University of New York at Buffalo, Buffalo, New York 14260, USA.
- 166 Northeastern University, Boston, Massachusetts 02115, USA.
- 167 Northwestern University, Evanston, Illinois 60208, USA.
- 168 University of Notre Dame, Notre Dame, Indiana 46556, USA.
- 169 The Ohio State University, Columbus, Ohio 43210, USA.
- 170 Princeton University, Princeton, New Jersey 08544, USA.
- 171 University of Puerto Rico, Mayaguez, Puerto Rico 00680.
- 172 Purdue University, West Lafayette, Indiana 47907, USA.
- 173 Purdue University Calumet, Hammond, Indiana 46323, USA.
- 174 Rice University, Houston, Texas 77251, USA.
- 175 University of Rochester, Rochester, New York 14627, USA.
- 176 The Rockefeller University, New York, New York 10021, USA.
- 177 Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA.
- 178 University of Tennessee, Knoxville, Tennessee 37996, USA.
- 179 Texas A&M University, College Station, Texas 77843, USA.
- 180 Texas Tech University, Lubbock, Texas 79409, USA.
- 181 Vanderbilt University, Nashville, Tennessee 37235, USA.
- 182 University of Virginia, Charlottesville, Virginia 22901, USA.
- 183 Wayne State University, Detroit, Michigan 48202, USA.
- 184 University of Wisconsin, Madison, Wisconsin 53706, USA.
- PMID: 25166654
- DOI: 10.1103/PhysRevLett.111.101804
Abstract
Results are presented from a search for the rare decays Bs(0)→μ+ μ- and B(0)→μ+ μ- in pp collisions at sqrt[s]=7 and 8 TeV, with data samples corresponding to integrated luminosities of 5 and 20 fb(-1), respectively, collected by the CMS experiment at the LHC. An unbinned maximum-likelihood fit to the dimuon invariant mass distribution gives a branching fraction B(Bs(0)→μ+ μ-)=(3.0(-0.9)(+1.0))×10(-9), where the uncertainty includes both statistical and systematic contributions. An excess of Bs(0)→μ+ μ- events with respect to background is observed with a significance of 4.3 standard deviations. For the decay B(0)→μ+ μ- an upper limit of B(B(0)→μ+ μ-)<1.1×10(-9) at the 95% confidence level is determined. Both results are in agreement with the expectations from the standard model.
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