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作者单位:1. Physics Department, SUNY Albany, Albany, NY, United States of America2. Department of Physics, University of Alberta, Edmonton, AB, Canada3. Department of Physics, Ankara University, Ankara, Turkey4. Department of Physics, Dumlupinar University, Kutahya, Turkey5. Department of Physics, Gazi University, Ankara, Turkey6. Division of Physics, TOBB University of Economics and Technology, Ankara, Turkey7. Turkish Atomic Energy Authority, Ankara, Turkey8. LAPP, CNRS/IN2P3 and Universit茅 de Savoie, Annecy-le-Vieux, France9. High Energy Physics Division, Argonne National Laboratory, Argonne, IL, United States of America10. Department of Physics, University of Arizona, Tucson, AZ, United States of America11. Department of Physics, The University of Texas at Arlington, Arlington, TX, United States of America12. Physics Department, University of Athens, Athens, Greece13. Physics Department, National Technical University of Athens, Zografou, Greece14. Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan15. Institut de F铆sica d鈥橝ltes Energies and Departament de F铆sica de la Universitat Aut貌noma de Barcelona and ICREA, Barcelona, Spain16. Institute of Physics, University of Belgrade, Belgrade, Serbia17. Vinca Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia18. Department for Physics and Technology, University of Bergen, Bergen, Norway19. Physics Division, Lawrence Berkeley National Laboratory and University of California, Berkeley, CA, United States of America20. Department of Physics, Humboldt University, Berlin, Germany21. Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics, University of Bern, Bern, Switzerland22. School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom23. Department of Physics, Bogazici University, Istanbul, Turkey24. Division of Physics, Dogus University, Istanbul, Turkey25. Department of Physics Engineering, Gaziantep University, Gaziantep, Turkey26. Department of Physics, Istanbul Technical University, Istanbul, Turkey27. INFN Sezione di Bologna, Bologna, Italy28. Dipartimento di Fisica, Universit脿 di Bologna, Bologna, Italy29. Physikalisches Institut, University of Bonn, Bonn, Germany30. Department of Physics, Boston University, Boston, MA, United States of America31. Department of Physics, Brandeis University, Waltham, MA, United States of America32. Universidade Federal do Rio De Janeiro COPPE/EE/IF, Rio de Janeiro, Brazil33. Federal University of Juiz de Fora (UFJF), Juiz de Fora, Brazil34. Federal University of Sao Joao del Rei (UFSJ), Sao Joao del Rei, Brazil35. Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, Brazil36. Physics Department, Brookhaven National Laboratory, Upton, NY, United States of America37. National Institute of Physics and Nuclear Engineering, Bucharest, Romania38. University Politehnica Bucharest, Bucharest, Romania39. West University in Timisoara, Timisoara, Romania40. Departamento de F铆sica, Universidad de Buenos Aires, Buenos Aires, Argentina41. Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom42. Department of Physics, Carleton University, Ottawa, ON, Canada43. CERN, Geneva, Switzerland44. Enrico Fermi Institute, University of Chicago, Chicago, IL, United States of America45. Departamento de F铆sica, Pontificia Universidad Cat贸lica de Chile, Santiago, Chile46. Departamento de F铆sica, Universidad T茅cnica Federico Santa Mar铆a, Valpara铆so, Chile47. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China48. Department of Modern Physics, University of Science and Technology of China, Anhui, China49. Department of Physics, Nanjing University, Jiangsu, China50. School of Physics, Shandong University, Shandong, China51. Laboratoire de Physique Corpusculaire, Clermont Universit茅 and Universit茅 Blaise Pascal and CNRS/IN2P3, Aubiere Cedex, France52. Nevis Laboratory, Columbia University, Irvington, NY, United States of America53. Niels Bohr Institute, University of Copenhagen, Kobenhavn, Denmark54. INFN Gruppo Collegato di Cosenza, Arcavata di Rende, Italy55. Dipartimento di Fisica, Universit脿 della Calabria, Arcavata di Rende, Italy56. AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland57. The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland58. Physics Department, Southern Methodist University, Dallas, TX, United States of America59. Physics Department, University of Texas at Dallas, Richardson, TX, United States of America60. DESY, Hamburg and Zeuthen, Germany61. Institut f眉r Experimentelle Physik IV, Technische Universit盲t Dortmund, Dortmund, Germany62. Institut f眉r Kern-und Teilchenphysik, Technical University Dresden, Dresden, Germany63. Department of Physics, Duke University, Durham, NC, United States of America64. SUPA - School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom65. INFN Laboratori Nazionali di Frascati, Frascati, Italy66. Fakult盲t f眉r Mathematik und Physik, Albert-Ludwigs-Universit盲t, Freiburg, Germany67. Section de Physique, Universit茅 de Gen猫ve, Geneva, Switzerland68. INFN Sezione di Genova, Genova, Italy69. Dipartimento di Fisica, Universit脿 di Genova, Genova, Italy70. E. Andronikashvili Institute of Physics, Tbilisi State University, Tbilisi, Georgia71. High Energy Physics Institute, Tbilisi State University, Tbilisi, Georgia72. II Physikalisches Institut, Justus-Liebig-Universit盲t Giessen, Giessen, Germany73. SUPA - School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom74. II Physikalisches Institut, Georg-August-Universit盲t, G枚ttingen, Germany75. Laboratoire de Physique Subatomique et de Cosmologie, Universit茅 Joseph Fourier and CNRS/IN2P3 and Institut National Polytechnique de Grenoble, Grenoble, France76. Department of Physics, Hampton University, Hampton, VA, United States of America77. Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA, United States of America78. Kirchhoff-Institut f眉r Physik, Ruprecht-Karls-Universit盲t Heidelberg, Heidelberg, Germany79. Physikalisches Institut, Ruprecht-Karls-Universit盲t Heidelberg, Heidelberg, Germany80. ZITI Institut f眉r technische Informatik, Ruprecht-Karls-Universit盲t Heidelberg, Mannheim, Germany81. Faculty of Applied Information Science, Hiroshima Institute of Technology, Hiroshima, Japan82. Department of Physics, Indiana University, Bloomington, IN, United States of America83. Institut f眉r Astro-und Teilchenphysik, Leopold-Franzens-Universit盲t, Innsbruck, Austria84. University of Iowa, Iowa City, IA, United States of America85. Department of Physics and Astronomy, Iowa State University, Ames, IA, United States of America86. Joint Institute for Nuclear Research, JINR Dubna, Dubna, Russia87. KEK, High Energy Accelerator Research Organization, Tsukuba, Japan88. Graduate School of Science, Kobe University, Kobe, Japan89. Faculty of Science, Kyoto University, Kyoto, Japan90. Kyoto University of Education, Kyoto, Japan91. Department of Physics, Kyushu University, Fukuoka, Japan92. Instituto de F铆sica La Plata, Universidad Nacional de La Plata and CONICET, La Plata, Argentina93. Physics Department, Lancaster University, Lancaster, United Kingdom94. INFN Sezione di Lecce, Lecce, Italy95. Dipartimento di Matematica e Fisica, Universit脿 del Salento, Lecce, Italy96. Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom97. Department of Physics, Jo啪ef Stefan Institute and University of Ljubljana, Ljubljana, Slovenia98. School of Physics and Astronomy, Queen Mary University of London, London, United Kingdom99. Department of Physics, Royal Holloway University of London, Surrey, United Kingdom100. Department of Physics and Astronomy, University College London, London, United Kingdom101. Laboratoire de Physique Nucl茅aire et de Hautes Energies, UPMC and Universit茅 Paris-Diderot and CNRS/IN2P3, Paris, France102. Fysiska institutionen, Lunds universitet, Lund, Sweden103. Departamento de Fisica Teorica C-15, Universidad Autonoma de Madrid, Madrid, Spain104. Institut f眉r Physik, Universit盲t Mainz, Mainz, Germany105. School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom106. CPPM, Aix-Marseille Universit茅 and CNRS/IN2P3, Marseille, France107. Department of Physics, University of Massachusetts, Amherst, MA, United States of America108. Department of Physics, McGill University, Montreal, QC, Canada109. School of Physics, University of Melbourne, Victoria, Australia110. Department of Physics, The University of Michigan, Ann Arbor, MI, United States of America111. Department of Physics and Astronomy, Michigan State University, East Lansing, MI, United States of America112. INFN Sezione di Milano, Milano, Italy113. Dipartimento di Fisica, Universit脿 di Milano, Milano, Italy114. B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, Republic of Belarus115. National Scientific and Educational Centre for Particle and High Energy Physics, Minsk, Republic of Belarus116. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, United States of America117. Group of Particle Physics, University of Montreal, Montreal, QC, Canada118. P.N. Lebedev Institute of Physics, Academy of Sciences, Moscow, Russia119. Institute for Theoretical and Experimental Physics (ITEP), Moscow, Russia120. Moscow Engineering and Physics Institute (MEPhI), Moscow, Russia121. Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia122. Fakult盲t f眉r Physik, Ludwig-Maximilians-Universit盲t M眉nchen, M眉nchen, Germany123. Max-Planck-Institut f眉r Physik (Werner-Heisenberg-Institut), M眉nchen, Germany124. Nagasaki Institute of Applied Science, Nagasaki, Japan125. Graduate School of Science and Kobayashi-Maskawa Institute, Nagoya University, Nagoya, Japan126. INFN Sezione di Napoli, Napoli, Italy127. Dipartimento di Scienze Fisiche, Universit脿 di Napoli, Napoli, Italy128. Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, United States of America129. Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen/Nikhef, Nijmegen, Netherlands130. Nikhef National Institute for Subatomic Physics and University of Amsterdam, Amsterdam, Netherlands131. Department of Physics, Northern Illinois University, DeKalb, IL, United States of America132. Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, Russia133. Department of Physics, New York University, New York, NY, United States of America134. Ohio State University, Columbus, OH, United States of America135. Faculty of Science, Okayama University, Okayama, Japan136. Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, United States of America137. Department of Physics, Oklahoma State University, Stillwater, OK, United States of America138. Palack媒 University, RCPTM, Olomouc, Czech Republic139. Center for High Energy Physics, University of Oregon, Eugene, OR, United States of America140. LAL, Universit茅 Paris-Sud and CNRS/IN2P3, Orsay, France141. Graduate School of Science, Osaka University, Osaka, Japan142. Department of Physics, University of Oslo, Oslo, Norway143. Department of Physics, Oxford University, Oxford, United Kingdom144. INFN Sezione di Pavia, Pavia, Italy145. Dipartimento di Fisica, Universit脿 di Pavia, Pavia, Italy146. Department of Physics, University of Pennsylvania, Philadelphia, PA, United States of America147. Petersburg Nuclear Physics Institute, Gatchina, Russia148. INFN Sezione di Pisa, Pisa, Italy149. Dipartimento di Fisica E. Fermi, Universit脿 di Pisa, Pisa, Italy150. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, United States of America151. Laboratorio de Instrumentacao e Fisica Experimental de Particulas - LIP, Lisboa, Portugal152. Departamento de Fisica Teorica y del Cosmos and CAFPE, Universidad de Granada, Granada, Spain153. Institute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech Republic154. Faculty of Mathematics and Physics, Charles University in Prague, Praha, Czech Republic155. Czech Technical University in Prague, Praha, Czech Republic156. State Research Center Institute for High Energy Physics, Protvino, Russia157. Particle Physics Department, Rutherford Appleton Laboratory, Didcot, United Kingdom158. Physics Department, University of Regina, Regina, SK, Canada159. Ritsumeikan University, Kusatsu, Shiga, Japan160. INFN Sezione di Roma I, Roma, Italy161. Dipartimento di Fisica, Universit脿 La Sapienza, Roma, Italy162. INFN Sezione di Roma Tor Vergata, Roma, Italy163. Dipartimento di Fisica, Universit脿 di Roma Tor Vergata, Roma, Italy164. INFN Sezione di Roma Tre, Roma, Italy165. Dipartimento di Fisica, Universit脿 Roma Tre, Roma, Italy166. Facult茅 des Sciences Ain Chock, R茅seau Universitaire de Physique des Hautes Energies - Universit茅 Hassan II, Casablanca, Morocco167. Centre National de l鈥橢nergie des Sciences Techniques Nucleaires, Rabat, Morocco168. Facult茅 des Sciences Semlalia, Universit茅 Cadi Ayyad, LPHEA, Marrakech, Morocco169. Facult茅 des Sciences, Universit茅 Mohamed Premier and LPTPM, Oujda, Morocco170. Facult茅 des sciences, Universit茅 Mohammed V-Agdal, Rabat, Morocco171. DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l鈥橴nivers), CEA Saclay (Commissariat a l鈥橢nergie Atomique), Gif-sur-Yvette, France172. Santa Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz, CA, United States of America173. Department of Physics, University of Washington, Seattle, WA, United States of America174. Department of Physics and Astronomy, University of Sheffield, Sheffield, United Kingdom175. Department of Physics, Shinshu University, Nagano, Japan176. Fachbereich Physik, Universit盲t Siegen, Siegen, Germany177. Department of Physics, Simon Fraser University, Burnaby, BC, Canada178. SLAC National Accelerator Laboratory, Stanford, CA, United States of America179. Faculty of Mathematics, Physics & Informatics, Comenius University, Bratislava, Slovak Republic180. Department of Subnuclear Physics, Institute of Experimental Physics of the Slovak Academy of Sciences, Kosice, Slovak Republic181. Department of Physics, University of Johannesburg, Johannesburg, South Africa182. School of Physics, University of the Witwatersrand, Johannesburg, South Africa183. Department of Physics, Stockholm University, Stockholm, Sweden184. The Oskar Klein Centre, Stockholm, Sweden185. Physics Department, Royal Institute of Technology, Stockholm, Sweden186. Departments of Physics & Astronomy and Chemistry, Stony Brook University, Stony Brook, NY, United States of America187. Department of Physics and Astronomy, University of Sussex, Brighton, United Kingdom188. School of Physics, University of Sydney, Sydney, Australia189. Institute of Physics, Academia Sinica, Taipei, Taiwan190. Department of Physics, Technion: Israel Institute of Technology, Haifa, Israel191. Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel192. Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece193. International Center for Elementary Particle Physics and Department of Physics, The University of Tokyo, Tokyo, Japan194. Graduate School of Science and Technology, Tokyo Metropolitan University, Tokyo, Japan195. Department of Physics, Tokyo Institute of Technology, Tokyo, Japan196. Department of Physics, University of Toronto, Toronto, ON, Canada197. TRIUMF, Vancouver, BC, Canada198. Department of Physics and Astronomy, York University, Toronto, ON, Canada199. Institute of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan200. Science and Technology Center, Tufts University, Medford, MA, United States of America201. Centro de Investigaciones, Universidad Antonio Narino, Bogota, Colombia202. Department of Physics and Astronomy, University of California Irvine, Irvine, CA, United States of America203. INFN Gruppo Collegato di Udine, Udine, Italy204. ICTP, Trieste, Italy205. Dipartimento di Chimica, Fisica e Ambiente, Universit脿 di Udine, Udine, Italy206. Department of Physics, University of Illinois, Urbana, IL, United States of America207. Department of Physics and Astronomy, University of Uppsala, Uppsala, Sweden208. Instituto de F谋sica Corpuscular (IFIC) and Departamento de F铆sica At贸mica, Molecular y Nuclear and Departamento de Ingenier麓谋a Electr贸nica and Instituto de Micro-electr贸nica de Barcelona (IMB-CNM), University of Valencia and CSIC, Valencia, Spain209. Department of Physics, University of British Columbia, Vancouver, BC, Canada210. Department of Physics and Astronomy, University of Victoria, Victoria, BC, Canada211. Department of Physics, University of Warwick, Coventry, United Kingdom212. Waseda University, Tokyo, Japan213. Department of Particle Physics, The Weizmann Institute of Science, Rehovot, Israel214. Department of Physics, University of Wisconsin, Madison, WI, United States of America215. Fakult盲t f眉r Physik und Astronomie, Julius-Maximilians-Universit盲t, W眉rzburg, Germany216. Fachbereich C Physik, Bergische Universit盲t Wuppertal, Wuppertal, Germany217. Department of Physics, Yale University, New Haven, CT, United States of America218. Yerevan Physics Institute, Yerevan, Armenia219. Domaine scientifique de la Doua, Centre de Calcul CNRS/IN2P3, Villeurbanne Cedex, France220. Faculdade de Ciencias and CFNUL, Universidade de Lisboa, Lisboa, Portugal221. Department of Physics, California State University, Fresno, CA, United States of America222. Novosibirsk State University, Novosibirsk, Russia223. Fermilab, Batavia, IL, United States of America224. Department of Physics, University of Coimbra, Coimbra, Portugal225. Department of Physics, UASLP, San Luis Potosi, Mexico226. Universit脿 di Napoli Parthenope, Napoli, Italy227. Institute of Particle Physics (IPP), Toronto, Canada228. Department of Physics, Middle East Technical University, Ankara, Turkey229. Louisiana Tech University, Ruston, LA, United States of America230. Dep Fisica and CEFITEC of Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal231. Department of Physics, University of Cape Town, Cape Town, South Africa232. Institut f眉r Experimentalphysik, Universit盲t Hamburg, Hamburg, Germany233. Manhattan College, New York, NY, United States of America234. School of Physics and Engineering, Sun Yat-sen University, Guanzhou, China235. Academia Sinica Grid Computing, Institute of Physics, Academia Sinica, Taipei, Taiwan236. Departamento de Fisica, Universidade de Minho, Braga, Portugal237. Department of Physics and Astronomy, University of South Carolina, Columbia, SC, United States of America238. Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Budapest, Hungary239. California Institute of Technology, Pasadena, CA, United States of America240. Institute of Physics, Jagiellonian University, Krakow, Poland
ISSN:1029-8479
文摘
A search for resonant production of high-mass top-quark pairs is performed on 2.05 fb−1 of proton-proton collisions at 脰s = 7 \sqrt {s} = 7 TeV collected in 2011 with the ATLAS experiment at the Large Hadron Collider. This analysis of the lepton+jets final state is specifically designed for the particular topology that arises from the decay of highly boosted top quarks. The observed t[`(t)] t\overline t invariant mass spectrum is found to be compatible with the Standard Model prediction and 95% credibility level upper limits are derived on the t[`(t)] t\overline t production rate through new massive states. An upper limit of 0.7 pb is set on the production cross section times branching fraction of a narrow 1 TeV resonance. A Kaluza-Klein gluon with a mass smaller than 1.5 TeV is excluded.