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Search for a narrow tt¯ resonance in pp¯ collisions at s=1.96  TeV

V. M. Abazov34, B. Abbott72, B. S. Acharya28, M. Adams48, T. Adams46, G. D. Alexeev34, G. Alkhazov38, A. Alton60,*, G. Alverson59 et al. (D0 Collaboration)

G. Alverson59, G. A. Alves2, M. Aoki47, A. Askew46, B. Åsman40, S. Atkins57, O. Atramentov64, K. Augsten9, C. Avila7, J. BackusMayes79, F. Badaud12, L. Bagby47, B. Baldin47, D. V. Bandurin46, S. Banerjee28, E. Barberis59, P. Baringer55, J. Barreto3, J. F. Bartlett47, U. Bassler17, V. Bazterra48, A. Bean55, M. Begalli3, C. Belanger-Champagne40, L. Bellantoni47, S. B. Beri26, G. Bernardi16, R. Bernhard21, I. Bertram41, M. Besançon17, R. Beuselinck42, V. A. Bezzubov37, P. C. Bhat47, V. Bhatnagar26, G. Blazey49, S. Blessing46, K. Bloom63, A. Boehnlein47, D. Boline69, E. E. Boos36, G. Borissov41, T. Bose58, A. Brandt75, O. Brandt22, R. Brock61, G. Brooijmans67, A. Bross47, D. Brown16, J. Brown16, X. B. Bu47, M. Buehler47, V. Buescher23, V. Bunichev36, S. Burdin41,†, T. H. Burnett79, C. P. Buszello40, B. Calpas14, E. Camacho-Pérez31, M. A. Carrasco-Lizarraga55, B. C. K. Casey47, H. Castilla-Valdez31, S. Chakrabarti69, D. Chakraborty49, K. M. Chan53, A. Chandra77, E. Chapon17, G. Chen55, S. Chevalier-Théry17, D. K. Cho74, S. W. Cho30, S. Choi30, B. Choudhary27, S. Cihangir47, D. Claes63, J. Clutter55, M. Cooke47, W. E. Cooper47, M. Corcoran77, F. Couderc17, M.-C. Cousinou14, A. Croc17, D. Cutts74, A. Das44, G. Davies42, K. De75, S. J. de Jong33, E. De La Cruz-Burelo31, F. Déliot17, R. Demina68, D. Denisov47, S. P. Denisov37, S. Desai47, C. Deterre17, K. DeVaughan63, H. T. Diehl47, M. Diesburg47, P. F. Ding43, A. Dominguez63, T. Dorland79, A. Dubey27, L. V. Dudko36, D. Duggan64, A. Duperrin14, S. Dutt26, A. Dyshkant49, M. Eads63, D. Edmunds61, J. Ellison45, V. D. Elvira47, Y. Enari16, H. Evans51, A. Evdokimov70, V. N. Evdokimov37, G. Facini59, T. Ferbel68, F. Fiedler23, F. Filthaut33, W. Fisher61, H. E. Fisk47, M. Fortner49, H. Fox41, S. Fuess47, A. Garcia-Bellido68, G. A. García-Guerra31,‡, V. Gavrilov35, P. Gay12, W. Geng14,61, D. Gerbaudo65, C. E. Gerber48, Y. Gershtein64, G. Ginther47,68, G. Golovanov34, A. Goussiou79, P. D. Grannis69, S. Greder18, H. Greenlee47, Z. D. Greenwood57, E. M. Gregores4, G. Grenier19, Ph. Gris12, J.-F. Grivaz15, A. Grohsjean17, S. Grünendahl47, M. W. Grünewald29, T. Guillemin15, G. Gutierrez47, P. Gutierrez72, A. Haas67,§, S. Hagopian46, J. Haley59, L. Han6, K. Harder43, A. Harel68, J. M. Hauptman54, J. Hays42, T. Head43, T. Hebbeker20, D. Hedin49, H. Hegab73, A. P. Heinson45, U. Heintz74, C. Hensel22, I. Heredia-De La Cruz31, K. Herner60, G. Hesketh43,∥, M. D. Hildreth53, R. Hirosky78, T. Hoang46, J. D. Hobbs69, B. Hoeneisen11, M. Hohlfeld23, Z. Hubacek9,17, V. Hynek9, I. Iashvili66, Y. Ilchenko76, R. Illingworth47, A. S. Ito47, S. Jabeen74, M. Jaffré15, D. Jamin14, A. Jayasinghe72, R. Jesik42, K. Johns44, M. Johnson47, A. Jonckheere47, P. Jonsson42, J. Joshi26, A. W. Jung47, A. Juste39, K. Kaadze56, E. Kajfasz14, D. Karmanov36, P. A. Kasper47, I. Katsanos63, R. Kehoe76, S. Kermiche14, N. Khalatyan47, A. Khanov73, A. Kharchilava66, Y. N. Kharzheev34, J. M. Kohli26, A. V. Kozelov37, J. Kraus61, S. Kulikov37, A. Kumar66, A. Kupco10, T. Kurča19, V. A. Kuzmin36, J. Kvita8, S. Lammers51, G. Landsberg74, P. Lebrun19, H. S. Lee30, S. W. Lee54, W. M. Lee47, J. Lellouch16, L. Li45, Q. Z. Li47, S. M. Lietti5, J. K. Lim30, D. Lincoln47, J. Linnemann61, V. V. Lipaev37, R. Lipton47, Y. Liu6, A. Lobodenko38, M. Lokajicek10, R. Lopes de Sa69, H. J. Lubatti79, R. Luna-Garcia31,¶, A. L. Lyon47, A. K. A. Maciel2, D. Mackin77, R. Madar17, R. Magaña-Villalba31, S. Malik63, V. L. Malyshev34, Y. Maravin56, J. Martínez-Ortega31, R. McCarthy69, C. L. McGivern55, M. M. Meijer33, A. Melnitchouk62, D. Menezes49, P. G. Mercadante4, M. Merkin36, A. Meyer20, J. Meyer22, F. Miconi18, N. K. Mondal28, G. S. Muanza14, M. Mulhearn78, E. Nagy14, M. Naimuddin27, M. Narain74, R. Nayyar27, H. A. Neal60, J. P. Negret7, P. Neustroev38, S. F. Novaes5, T. Nunnemann24, G. Obrant38,‡‡, J. Orduna77, N. Osman14, J. Osta53, G. J. Otero y Garzón1, M. Padilla45, A. Pal75, N. Parashar52, V. Parihar74, S. K. Park30, R. Partridge74,§, N. Parua51, A. Patwa70, B. Penning47, M. Perfilov36, Y. Peters43, K. Petridis43, G. Petrillo68, P. Pétroff15, R. Piegaia1, M.-A. Pleier70, P. L. M. Podesta-Lerma31,**, V. M. Podstavkov47, P. Polozov35, A. V. Popov37, M. Prewitt77, D. Price51, N. Prokopenko37, J. Qian60, A. Quadt22, B. Quinn62, M. S. Rangel2, K. Ranjan27, P. N. Ratoff41, I. Razumov37, P. Renkel76, M. Rijssenbeek69, I. Ripp-Baudot18, F. Rizatdinova73, M. Rominsky47, A. Ross41, C. Royon17, P. Rubinov47, R. Ruchti53, G. Safronov35, G. Sajot13, P. Salcido49, A. Sánchez-Hernández31, M. P. Sanders24, B. Sanghi47, A. S. Santos5, G. Savage47, L. Sawyer57, T. Scanlon42, R. D. Schamberger69, Y. Scheglov38, H. Schellman50, T. Schliephake25, S. Schlobohm79, C. Schwanenberger43, R. Schwienhorst61, J. Sekaric55, H. Severini72, E. Shabalina22, V. Shary17, A. A. Shchukin37, R. K. Shivpuri27, V. Simak9, V. Sirotenko47, P. Skubic72, P. Slattery68, D. Smirnov53, K. J. Smith66, G. R. Snow63, J. Snow71, S. Snyder70, S. Söldner-Rembold43, L. Sonnenschein20, K. Soustruznik8, J. Stark13, V. Stolin35, D. A. Stoyanova37, M. Strauss72, D. Strom48, L. Stutte47, L. Suter43, P. Svoisky72, M. Takahashi43, A. Tanasijczuk1, M. Titov17, V. V. Tokmenin34, Y.-T. Tsai68, K. Tschann-Grimm69, D. Tsybychev69, B. Tuchming17, C. Tully65, L. Uvarov38, S. Uvarov38, S. Uzunyan49, R. Van Kooten51, W. M. van Leeuwen32, N. Varelas48, E. W. Varnes44, I. A. Vasilyev37, P. Verdier19, L. S. Vertogradov34, M. Verzocchi47, M. Vesterinen43, D. Vilanova17, P. Vokac9, H. D. Wahl46, M. H. L. S. Wang47, J. Warchol53, G. Watts79, M. Wayne53, M. Weber47,††, L. Welty-Rieger50, A. White75, D. Wicke25, M. R. J. Williams41, G. W. Wilson55, M. Wobisch57, D. R. Wood59, T. R. Wyatt43, Y. Xie47, R. Yamada47, W.-C. Yang43, T. Yasuda47, Y. A. Yatsunenko34, Z. Ye47, H. Yin47, K. Yip70, S. W. Youn47, J. Yu75, T. Zhao79, B. Zhou60, J. Zhu60, M. Zielinski68, D. Zieminska51, and L. Zivkovic74 (D0 Collaboration)

  • 1Universidad de Buenos Aires, Buenos Aires, Argentina
  • 2LAFEX, Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil
  • 3Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
  • 4Universidade Federal do ABC, Santo André, Brazil
  • 5Instituto de Física Teórica, Universidade Estadual Paulista, São Paulo, Brazil
  • 6University of Science and Technology of China, Hefei, People’s Republic of China
  • 7Universidad de los Andes, Bogotá, Colombia
  • 8Charles University, Faculty of Mathematics and Physics, Center for Particle Physics, Prague, Czech Republic
  • 9Czech Technical University in Prague, Prague, Czech Republic
  • 10Center for Particle Physics, Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
  • 11Universidad San Francisco de Quito, Quito, Ecuador
  • 12LPC, Université Blaise Pascal, CNRS/IN2P3, Clermont, France
  • 13LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, Grenoble, France
  • 14CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France
  • 15LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
  • 16LPNHE, Universités Paris VI and VII, CNRS/IN2P3, Paris, France
  • 17CEA, Irfu, SPP, Saclay, France
  • 18IPHC, Université de Strasbourg, CNRS/IN2P3, Strasbourg, France
  • 19IPNL, Université Lyon 1, CNRS/IN2P3, Villeurbanne, France and Université de Lyon, Lyon, France
  • 20III. Physikalisches Institut A, RWTH Aachen University, Aachen, Germany
  • 21Physikalisches Institut, Universität Freiburg, Freiburg, Germany
  • 22II. Physikalisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany
  • 23Institut für Physik, Universität Mainz, Mainz, Germany
  • 24Ludwig-Maximilians-Universität München, München, Germany
  • 25Fachbereich Physik, Bergische Universität Wuppertal, Wuppertal, Germany
  • 26Panjab University, Chandigarh, India
  • 27Delhi University, Delhi, India
  • 28Tata Institute of Fundamental Research, Mumbai, India
  • 29University College Dublin, Dublin, Ireland
  • 30Korea Detector Laboratory, Korea University, Seoul, Korea
  • 31CINVESTAV, Mexico City, Mexico
  • 32Nikhef, Science Park, Amsterdam, the Netherlands
  • 33Radboud University Nijmegen, Nijmegen, the Netherlands and Nikhef, Science Park, Amsterdam, the Netherlands
  • 34Joint Institute for Nuclear Research, Dubna, Russia
  • 35Institute for Theoretical and Experimental Physics, Moscow, Russia
  • 36Moscow State University, Moscow, Russia
  • 37Institute for High Energy Physics, Protvino, Russia
  • 38Petersburg Nuclear Physics Institute, St. Petersburg, Russia
  • 39Institució Catalana de Recerca i Estudis Avançats (ICREA) and Institut de Física d’Altes Energies (IFAE), Barcelona, Spain
  • 40Stockholm University, Stockholm and Uppsala University, Uppsala, Sweden
  • 41Lancaster University, Lancaster LA1 4YB, United Kingdom
  • 42Imperial College London, London SW7 2AZ, United Kingdom
  • 43The University of Manchester, Manchester M13 9PL, United Kingdom
  • 44University of Arizona, Tucson, Arizona 85721, USA
  • 45University of California Riverside, Riverside, California 92521, USA
  • 46Florida State University, Tallahassee, Florida 32306, USA
  • 47Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
  • 48University of Illinois at Chicago, Chicago, Illinois 60607, USA
  • 49Northern Illinois University, DeKalb, Illinois 60115, USA
  • 50Northwestern University, Evanston, Illinois 60208, USA
  • 51Indiana University, Bloomington, Indiana 47405, USA
  • 52Purdue University Calumet, Hammond, Indiana 46323, USA
  • 53University of Notre Dame, Notre Dame, Indiana 46556, USA
  • 54Iowa State University, Ames, Iowa 50011, USA
  • 55University of Kansas, Lawrence, Kansas 66045, USA
  • 56Kansas State University, Manhattan, Kansas 66506, USA
  • 57Louisiana Tech University, Ruston, Louisiana 71272, USA
  • 58Boston University, Boston, Massachusetts 02215, USA
  • 59Northeastern University, Boston, Massachusetts 02115, USA
  • 60University of Michigan, Ann Arbor, Michigan 48109, USA
  • 61Michigan State University, East Lansing, Michigan 48824, USA
  • 62University of Mississippi, University, Mississippi 38677, USA
  • 63University of Nebraska, Lincoln, Nebraska 68588, USA
  • 64Rutgers University, Piscataway, New Jersey 08855, USA
  • 65Princeton University, Princeton, New Jersey 08544, USA
  • 66State University of New York, Buffalo, New York 14260, USA
  • 67Columbia University, New York, New York 10027, USA
  • 68University of Rochester, Rochester, New York 14627, USA
  • 69State University of New York, Stony Brook, New York 11794, USA
  • 70Brookhaven National Laboratory, Upton, New York 11973, USA
  • 71Langston University, Langston, Oklahoma 73050, USA
  • 72University of Oklahoma, Norman, Oklahoma 73019, USA
  • 73Oklahoma State University, Stillwater, Oklahoma 74078, USA
  • 74Brown University, Providence, Rhode Island 02912, USA
  • 75University of Texas, Arlington, Texas 76019, USA
  • 76Southern Methodist University, Dallas, Texas 75275, USA
  • 77Rice University, Houston, Texas 77005, USA
  • 78University of Virginia, Charlottesville, Virginia 22901, USA
  • 79University of Washington, Seattle, Washington 98195, USA

  • *Visitor from Augustana College, Sioux Falls, SD, USA
  • †Visitor from The University of Liverpool, Liverpool, UK
  • ‡Visitor from UPIITA-IPN, Mexico City, Mexico
  • §Visitor from SLAC, Menlo Park, CA, USA
  • ∥Visitor from University College London, London, UK
  • Visitor from Centro de Investigacion en Computacion—IPN, Mexico City, Mexico
  • **Visitor from ECFM, Universidad Autonoma de Sinaloa, Culiaćan, Mexico
  • ††Visitor from Universität Bern, Bern, Switzerland.
  • ‡‡Deceased.
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Phys. Rev. D 85, 051101(R) – Published 14 March, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.051101

Abstract

We report a search for a narrow tt¯ resonance that decays into a lepton+jets final state based on an integrated luminosity of 5.3  fb−1 of proton-antiproton collisions at s=1.96  TeV collected by the D0 Collaboration at the Fermilab Tevatron Collider. We set upper limits on the production cross section of such a resonance multiplied by its branching fraction to tt¯. We exclude a leptophobic topcolor Z′ at the 95% confidence level for masses below 835 GeV (940 GeV) if its width is 1.2% (3%) of its mass. We also exclude color octet vector bosons (colorons) with masses below 775 GeV.

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Phys. Rev. D 85, 051101(R)– Published 14 March, 2012
  • Received 4 November 2011
Article part of CHORUS

© 2012 American Physical Society

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