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Phys Rev Lett. 2013 Sep 06;111(10):101804. doi: 10.1103/PhysRevLett.111.101804. Epub 2013 Sep 05.

Measurement of the Bs(0)→μ+ μ- branching fraction and search for B(0)→μ+ μ- with the CMS experiment.

Physical review letters

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Iles, M Jarvis, G Karapostoli, M Kenzie, R Lane, R Lucas, L Lyons, A-M Magnan, J Marrouche, B Mathias, R Nandi, J Nash, A Nikitenko, J Pela, M Pesaresi, K Petridis, M Pioppi, D M Raymond, S Rogerson, A Rose, C Seez, P Sharp, A Sparrow, A Tapper, M Vazquez Acosta, T Virdee, S Wakefield, N Wardle, M Chadwick, J E Cole, P R Hobson, A Khan, P Kyberd, D Leggat, D Leslie, W Martin, I D Reid, P Symonds, L Teodorescu, M Turner, J Dittmann, K Hatakeyama, A Kasmi, H Liu, T Scarborough, O Charaf, S I Cooper, C Henderson, P Rumerio, A Avetisyan, T Bose, C Fantasia, A Heister, P Lawson, D Lazic, J Rohlf, D Sperka, J St John, L Sulak, J Alimena, S Bhattacharya, G Christopher, D Cutts, Z Demiragli, A Ferapontov, A Garabedian, U Heintz, S Jabeen, G Kukartsev, E Laird, G Landsberg, M Luk, M Narain, M Segala, T Sinthuprasith, T Speer, R Breedon, G Breto, M Calderon De La Barca Sanchez, S Chauhan, M Chertok, J Conway, R Conway, P T Cox, R Erbacher, M Gardner, R Houtz, W Ko, A Kopecky, R Lander, T Miceli, D Pellett, J Pilot, F Ricci-Tam, B Rutherford, M Searle, J Smith, M Squires, M Tripathi, S Wilbur, R Yohay, V Andreev, D Cline, R Cousins, S Erhan, P Everaerts, C Farrell, M Felcini, J Hauser, M Ignatenko, C Jarvis, G Rakness, P Schlein, E Takasugi, P Traczyk, V Valuev, M Weber, J Babb, R Clare, J Ellison, J W Gary, G Hanson, J Heilman, P Jandir, H Liu, O R Long, A Luthra, M Malberti, H Nguyen, A Shrinivas, J Sturdy, S Sumowidagdo, R Wilken, S Wimpenny, W Andrews, J G Branson, G B Cerati, S Cittolin, D Evans, A Holzner, R Kelley, M Lebourgeois, J Letts, I Macneill, S Padhi, C Palmer, G Petrucciani, M Pieri, M Sani, V Sharma, S Simon, E Sudano, M Tadel, Y Tu, A Vartak, S Wasserbaech, F Würthwein, A Yagil, J Yoo, D Barge, C Campagnari, T Danielson, K Flowers, P Geffert, C George, F Golf, J Incandela, C Justus, D Kovalskyi, V Krutelyov, R Magaña Villalba, N Mccoll, V Pavlunin, J Richman, R Rossin, D Stuart, W To, C West, A Apresyan, A Bornheim, J Bunn, Y Chen, E Di Marco, J Duarte, D Kcira, Y Ma, A Mott, H B Newman, C Pena, C Rogan, M Spiropulu, V Timciuc, J Veverka, R Wilkinson, S Xie, R Y Zhu, V Azzolini, A Calamba, R Carroll, T Ferguson, Y Iiyama, D W Jang, Y F Liu, M Paulini, J Russ, H Vogel, I Vorobiev, J P Cumalat, B R Drell, W T Ford, A Gaz, E Luiggi Lopez, U Nauenberg, J G Smith, K Stenson, K A Ulmer, S R Wagner, J Alexander, A Chatterjee, N Eggert, L K Gibbons, W Hopkins, A Khukhunaishvili, B Kreis, N Mirman, G Nicolas Kaufman, J R Patterson, A Ryd, E Salvati, W Sun, W D Teo, J Thom, J Thompson, J Tucker, Y Weng, L Winstrom, P Wittich, D Winn, S Abdullin, M Albrow, J Anderson, G Apollinari, L A T Bauerdick, A Beretvas, J Berryhill, P C Bhat, K Burkett, J N Butler, V Chetluru, H W K Cheung, F Chlebana, S Cihangir, V D Elvira, I Fisk, J Freeman, Y Gao, E Gottschalk, L Gray, D Green, O Gutsche, D Hare, R M Harris, J Hirschauer, B Hooberman, S Jindariani, M Johnson, U Joshi, K Kaadze, B Klima, S Kunori, S Kwan, J Linacre, D Lincoln, R Lipton, J Lykken, K Maeshima, J M Marraffino, V I Martinez Outschoorn, S Maruyama, D Mason, P McBride, K Mishra, S Mrenna, Y Musienko, C Newman-Holmes, V O'Dell, O Prokofyev, N Ratnikova, E Sexton-Kennedy, S Sharma, W J Spalding, L Spiegel, L Taylor, S Tkaczyk, N V Tran, L Uplegger, E W Vaandering, R Vidal, J Whitmore, W Wu, F Yang, J C Yun, D Acosta, P Avery, D Bourilkov, M Chen, T Cheng, S Das, M De Gruttola, G P Di Giovanni, D Dobur, A Drozdetskiy, R D Field, M Fisher, Y Fu, I K Furic, J Hugon, B Kim, J Konigsberg, A Korytov, A Kropivnitskaya, T Kypreos, J F Low, K Matchev, P Milenovic, G Mitselmakher, L Muniz, R Remington, A Rinkevicius, N Skhirtladze, M Snowball, J Yelton, M Zakaria, V Gaultney, S Hewamanage, S Linn, P Markowitz, G Martinez, J L Rodriguez, T Adams, A Askew, J Bochenek, J Chen, B Diamond, J Haas, S Hagopian, V Hagopian, K F Johnson, H Prosper, V Veeraraghavan, M Weinberg, M M Baarmand, B Dorney, M Hohlmann, H Kalakhety, F Yumiceva, M R Adams, L Apanasevich, V E Bazterra, R R Betts, I Bucinskaite, J Callner, R Cavanaugh, O Evdokimov, L Gauthier, C E Gerber, D J Hofman, S Khalatyan, P Kurt, F Lacroix, D H Moon, C O'Brien, C Silkworth, D Strom, P Turner, N Varelas, U Akgun, E A Albayrak, B Bilki, W Clarida, K Dilsiz, F Duru, S Griffiths, J-P Merlo, H Mermerkaya, A Mestvirishvili, A Moeller, J Nachtman, C R Newsom, H Ogul, Y Onel, F Ozok, S Sen, P Tan, E Tiras, J Wetzel, T Yetkin, K Yi, B A Barnett, B Blumenfeld, S Bolognesi, G Giurgiu, A V Gritsan, G Hu, P Maksimovic, C Martin, M Swartz, A Whitbeck, P Baringer, A Bean, G Benelli, R P Kenny, M Murray, D Noonan, S Sanders, R Stringer, J S Wood, A F Barfuss, I Chakaberia, A Ivanov, S Khalil, M Makouski, Y Maravin, L K Saini, S Shrestha, I Svintradze, J Gronberg, D Lange, F Rebassoo, D Wright, A Baden, B Calvert, S C Eno, J A Gomez, N J Hadley, R G Kellogg, T Kolberg, Y Lu, M Marionneau, A C Mignerey, K Pedro, A Peterman, A Skuja, J Temple, M B Tonjes, S C Tonwar, A Apyan, G Bauer, W Busza, I A Cali, M Chan, L Di Matteo, V Dutta, G Gomez Ceballos, M Goncharov, D Gulhan, Y Kim, M Klute, Y S Lai, A Levin, P D Luckey, T Ma, S Nahn, C Paus, D Ralph, C Roland, G Roland, G S F Stephans, F Stöckli, K Sumorok, D Velicanu, R Wolf, B Wyslouch, M Yang, Y Yilmaz, A S Yoon, M Zanetti, V Zhukova, B Dahmes, A De Benedetti, A Gude, J Haupt, S C Kao, K Klapoetke, Y Kubota, J Mans, N Pastika, R Rusack, M Sasseville, A Singovsky, N Tambe, J Turkewitz, J G Acosta, L M Cremaldi, R Kroeger, S Oliveros, L Perera, R Rahmat, D A Sanders, D Summers, E Avdeeva, K Bloom, S Bose, D R Claes, A Dominguez, M Eads, R Gonzalez Suarez, J Keller, I Kravchenko, J Lazo-Flores, S Malik, F Meier, G R Snow, J Dolen, A Godshalk, I Iashvili, S Jain, A Kharchilava, A Kumar, S Rappoccio, Z Wan, G Alverson, E Barberis, D Baumgartel, M Chasco, J Haley, A Massironi, D Nash, T Orimoto, D Trocino, D Wood, J Zhang, A Anastassov, K A Hahn, A Kubik, L Lusito, N Mucia, N Odell, B Pollack, A Pozdnyakov, M Schmitt, S Stoynev, K Sung, M Velasco, S Won, D Berry, A Brinkerhoff, K M Chan, M Hildreth, C Jessop, D J Karmgard, J Kolb, K Lannon, W Luo, S Lynch, N Marinelli, D M Morse, T Pearson, M Planer, R Ruchti, J Slaunwhite, N Valls, M Wayne, M Wolf, L Antonelli, B Bylsma, L S Durkin, S Flowers, C Hill, R Hughes, K Kotov, T Y Ling, D Puigh, M Rodenburg, G Smith, C Vuosalo, B L Winer, H Wolfe, E Berry, P Elmer, V Halyo, P Hebda, J Hegeman, A Hunt, P Jindal, S A Koay, P Lujan, D Marlow, T Medvedeva, M Mooney, J Olsen, P Piroué, X Quan, A Raval, H Saka, D Stickland, C Tully, J S Werner, S C Zenz, A Zuranski, E Brownson, A Lopez, H Mendez, J E Ramirez Vargas, E Alagoz, D Benedetti, G Bolla, D Bortoletto, M De Mattia, A Everett, Z Hu, M Jones, K Jung, O Koybasi, M Kress, N Leonardo, D Lopes Pegna, V Maroussov, P Merkel, D H Miller, N Neumeister, I Shipsey, D Silvers, A Svyatkovskiy, F Wang, W Xie, L Xu, H D Yoo, J Zablocki, Y Zheng, N Parashar, A Adair, B Akgun, K M Ecklund, F J M Geurts, W Li, B Michlin, B P Padley, R Redjimi, J Roberts, J Zabel, B Betchart, A Bodek, R Covarelli, P de Barbaro, R Demina, Y Eshaq, T Ferbel, A Garcia-Bellido, P Goldenzweig, J Han, A Harel, D C Miner, G Petrillo, D Vishnevskiy, M Zielinski, A Bhatti, R Ciesielski, L Demortier, K Goulianos, G Lungu, S Malik, C Mesropian, S Arora, A Barker, J P Chou, C Contreras-Campana, E Contreras-Campana, D Duggan, D Ferencek, Y Gershtein, R Gray, E Halkiadakis, D Hidas, A Lath, S Panwalkar, M Park, R Patel, V Rekovic, J Robles, S Salur, S Schnetzer, C Seitz, S Somalwar, R Stone, S Thomas, P Thomassen, M Walker, G Cerizza, M Hollingsworth, K Rose, S Spanier, Z C Yang, A York, O Bouhali, R Eusebi, W Flanagan, J Gilmore, T Kamon, V Khotilovich, R Montalvo, I Osipenkov, Y Pakhotin, A Perloff, J Roe, A Safonov, T Sakuma, I Suarez, A Tatarinov, D Toback, N Akchurin, C Cowden, J Damgov, C Dragoiu, P R Dudero, K Kovitanggoon, S W Lee, T Libeiro, I Volobouev, E Appelt, A G Delannoy, S Greene, A Gurrola, W Johns, C Maguire, Y Mao, A Melo, M Sharma, P Sheldon, B Snook, S Tuo, J Velkovska, M W Arenton, S Boutle, B Cox, B Francis, J Goodell, R Hirosky, A Ledovskoy, C Lin, C Neu, J Wood, S Gollapinni, R Harr, P E Karchin, C Kottachchi Kankanamge Don, P Lamichhane, A Sakharov, D A Belknap, L Borrello, D Carlsmith, M Cepeda, S Dasu, S Duric, E Friis, M Grothe, R Hall-Wilton, M Herndon, A Hervé, P Klabbers, J Klukas, A Lanaro, R Loveless, A Mohapatra, I Ojalvo, T Perry, G A Pierro, G Polese, I Ross, T Sarangi, A Savin, W H Smith, J Swanson,

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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