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Measurement of the tt¯ production cross section in pp¯ collisions using dilepton events

V. M. Abazov35, B. Abbott75, M. Abolins65, B. S. Acharya28, M. Adams51, T. Adams49, E. Aguilo5, S. H. Ahn30, M. Ahsan59 et al. (D0 Collaboration)

M. Ahsan59, G. D. Alexeev35, G. Alkhazov39, A. Alton64,*, G. Alverson63, G. A. Alves2, M. Anastasoaie34, L. S. Ancu34, T. Andeen53, S. Anderson45, B. Andrieu16, M. S. Anzelc53, Y. Arnoud13, M. Arov60, M. Arthaud17, A. Askew49, B. Åsman40, A. C. S. Assis Jesus3, O. Atramentov49, C. Autermann20, C. Avila7, C. Ay23, F. Badaud12, A. Baden61, L. Bagby52, B. Baldin50, D. V. Bandurin59, S. Banerjee28, P. Banerjee28, E. Barberis63, A.-F. Barfuss14, P. Bargassa80, P. Baringer58, J. Barreto2, J. F. Bartlett50, U. Bassler16, D. Bauer43, S. Beale5, A. Bean58, M. Begalli3, M. Begel71, C. Belanger-Champagne40, L. Bellantoni50, A. Bellavance50, J. A. Benitez65, S. B. Beri26, G. Bernardi16, R. Bernhard22, L. Berntzon14, I. Bertram42, M. Besançon17, R. Beuselinck43, V. A. Bezzubov38, P. C. Bhat50, V. Bhatnagar26, C. Biscarat19, G. Blazey52, F. Blekman43, S. Blessing49, D. Bloch18, K. Bloom67, A. Boehnlein50, D. Boline62, T. A. Bolton59, G. Borissov42, K. Bos33, T. Bose77, A. Brandt78, R. Brock65, G. Brooijmans70, A. Bross50, D. Brown78, N. J. Buchanan49, D. Buchholz53, M. Buehler81, V. Buescher21, S. Burdin42,†, S. Burke45, T. H. Burnett82, C. P. Buszello43, J. M. Butler62, P. Calfayan24, S. Calvet14, J. Cammin71, S. Caron33, W. Carvalho3, B. C. K. Casey77, N. M. Cason55, H. Castilla-Valdez32, S. Chakrabarti17, D. Chakraborty52, K. M. Chan55, K. Chan5, A. Chandra48, F. Charles18, E. Cheu45, F. Chevallier13, D. K. Cho62, S. Choi31, B. Choudhary27, L. Christofek77, T. Christoudias43, S. Cihangir50, D. Claes67, C. Clément40, B. Clément18, Y. Coadou5, M. Cooke80, W. E. Cooper50, M. Corcoran80, F. Couderc17, M.-C. Cousinou14, S. Crépé-Renaudin13, D. Cutts77, M. Ćwiok29, H. da Motta2, A. Das62, G. Davies43, K. De78, S. J. de Jong34, P. de Jong33, E. De La Cruz-Burelo64, C. De Oliveira Martins3, J. D. Degenhardt64, F. Déliot17, M. Demarteau50, R. Demina71, D. Denisov50, S. P. Denisov38, S. Desai50, H. T. Diehl50, M. Diesburg50, A. Dominguez67, H. Dong72, L. V. Dudko37, L. Duflot15, S. R. Dugad28, D. Duggan49, A. Duperrin14, J. Dyer65, A. Dyshkant52, M. Eads67, D. Edmunds65, J. Ellison48, V. D. Elvira50, Y. Enari77, S. Eno61, P. Ermolov37, H. Evans54, A. Evdokimov73, V. N. Evdokimov38, A. V. Ferapontov59, T. Ferbel71, F. Fiedler24, F. Filthaut34, W. Fisher50, H. E. Fisk50, M. Ford44, M. Fortner52, H. Fox22, S. Fu50, S. Fuess50, T. Gadfort82, C. F. Galea34, E. Gallas50, E. Galyaev55, C. Garcia71, A. Garcia-Bellido82, V. Gavrilov36, P. Gay12, W. Geist18, D. Gelé18, C. E. Gerber51, Y. Gershtein49, D. Gillberg5, G. Ginther71, N. Gollub40, B. Gómez7, A. Goussiou55, P. D. Grannis72, H. Greenlee50, Z. D. Greenwood60, E. M. Gregores4, G. Grenier19, Ph. Gris12, J.-F. Grivaz15, A. Grohsjean24, S. Grünendahl50, M. W. Grünewald29, J. Guo72, F. Guo72, P. Gutierrez75, G. Gutierrez50, A. Haas70, N. J. Hadley61, P. Haefner24, S. Hagopian49, J. Haley68, I. Hall75, R. E. Hall47, L. Han6, K. Hanagaki50, P. Hansson40, K. Harder44, A. Harel71, R. Harrington63, J. M. Hauptman57, R. Hauser65, J. Hays43, T. Hebbeker20, D. Hedin52, J. G. Hegeman33, J. M. Heinmiller51, A. P. Heinson48, U. Heintz62, C. Hensel58, K. Herner72, G. Hesketh63, M. D. Hildreth55, R. Hirosky81, J. D. Hobbs72, B. Hoeneisen11, H. Hoeth25, M. Hohlfeld21, S. J. Hong30, R. Hooper77, S. Hossain75, P. Houben33, Y. Hu72, Z. Hubacek9, V. Hynek8, I. Iashvili69, R. Illingworth50, A. S. Ito50, S. Jabeen62, M. Jaffré15, S. Jain75, K. Jakobs22, C. Jarvis61, R. Jesik43, K. Johns45, C. Johnson70, M. Johnson50, A. Jonckheere50, P. Jonsson43, A. Juste50, D. Käfer20, S. Kahn73, E. Kajfasz14, A. M. Kalinin35, J. R. Kalk65, J. M. Kalk60, S. Kappler20, D. Karmanov37, J. Kasper62, P. Kasper50, I. Katsanos70, D. Kau49, R. Kaur26, V. Kaushik78, R. Kehoe79, S. Kermiche14, N. Khalatyan38, A. Khanov76, A. Kharchilava69, Y. M. Kharzheev35, D. Khatidze70, H. Kim31, T. J. Kim30, M. H. Kirby34, M. Kirsch20, B. Klima50, J. M. Kohli26, J.-P. Konrath22, M. Kopal75, V. M. Korablev38, B. Kothari70, A. V. Kozelov38, D. Krop54, A. Kryemadhi81, T. Kuhl23, A. Kumar69, S. Kunori61, A. Kupco10, T. Kurča19, J. Kvita8, F. Lacroix12, D. Lam55, S. Lammers70, G. Landsberg77, J. Lazoflores49, P. Lebrun19, W. M. Lee50, A. Leflat37, F. Lehner41, J. Lellouch16, V. Lesne12, J. Leveque45, P. Lewis43, J. Li78, Q. Z. Li50, L. Li48, S. M. Lietti4, J. G. R. Lima52, D. Lincoln50, J. Linnemann65, V. V. Lipaev38, R. Lipton50, Y. Liu6, Z. Liu5, L. Lobo43, A. Lobodenko39, M. Lokajicek10, A. Lounis18, P. Love42, H. J. Lubatti82, A. L. Lyon50, A. K. A. Maciel2, D. Mackin80, R. J. Madaras46, P. Mättig25, C. Magass20, A. Magerkurth64, N. Makovec15, P. K. Mal55, H. B. Malbouisson3, S. Malik67, V. L. Malyshev35, H. S. Mao50, Y. Maravin59, B. Martin13, R. McCarthy72, A. Melnitchouk66, A. Mendes14, L. Mendoza7, P. G. Mercadante4, M. Merkin37, K. W. Merritt50, J. Meyer21, A. Meyer20, M. Michaut17, T. Millet19, J. Mitrevski70, J. Molina3, R. K. Mommsen44, N. K. Mondal28, R. W. Moore5, T. Moulik58, G. S. Muanza19, M. Mulders50, M. Mulhearn70, O. Mundal21, L. Mundim3, E. Nagy14, M. Naimuddin50, M. Narain77, N. A. Naumann34, H. A. Neal64, J. P. Negret7, P. Neustroev39, H. Nilsen22, A. Nomerotski50, S. F. Novaes4, T. Nunnemann24, V. O’Dell50, D. C. O’Neil5, G. Obrant39, C. Ochando15, D. Onoprienko59, N. Oshima50, J. Osta55, R. Otec9, G. J. Otero y Garzón51, M. Owen44, P. Padley80, M. Pangilinan77, N. Parashar56, S.-J. Park71, S. K. Park30, J. Parsons70, R. Partridge77, N. Parua54, A. Patwa73, G. Pawloski80, B. Penning22, P. M. Perea48, K. Peters44, Y. Peters25, P. Pétroff15, M. Petteni43, R. Piegaia1, J. Piper65, M.-A. Pleier21, P. L. M. Podesta-Lerma32,‡, V. M. Podstavkov50, Y. Pogorelov55, M.-E. Pol2, P. Polozov36, A. Pompǒ1, B. G. Pope65, A. V. Popov38, C. Potter5, W. L. Prado da Silva3, H. B. Prosper49, S. Protopopescu73, J. Qian64, A. Quadt21, B. Quinn66, A. Rakitine42, M. S. Rangel2, K. J. Rani28, K. Ranjan27, P. N. Ratoff42, P. Renkel79, S. Reucroft63, P. Rich44, M. Rijssenbeek72, I. Ripp-Baudot18, F. Rizatdinova76, S. Robinson43, R. F. Rodrigues3, C. Royon17, P. Rubinov50, R. Ruchti55, G. Safronov36, G. Sajot13, A. Sánchez-Hernández32, M. P. Sanders16, A. Santoro3, G. Savage50, L. Sawyer60, T. Scanlon43, D. Schaile24, R. D. Schamberger72, Y. Scheglov39, H. Schellman53, P. Schieferdecker24, T. Schliephake25, C. Schmitt25, C. Schwanenberger44, A. Schwartzman68, R. Schwienhorst65, J. Sekaric49, S. Sengupta49, H. Severini75, E. Shabalina51, M. Shamim59, V. Shary17, A. A. Shchukin38, R. K. Shivpuri27, D. Shpakov50, V. Siccardi18, V. Simak9, V. Sirotenko50, P. Skubic75, P. Slattery71, D. Smirnov55, R. P. Smith50, J. Snow74, G. R. Snow67, S. Snyder73, S. Söldner-Rembold44, L. Sonnenschein16, A. Sopczak42, M. Sosebee78, K. Soustruznik8, M. Souza2, B. Spurlock78, J. Stark13, J. Steele60, V. Stolin36, A. Stone51, D. A. Stoyanova38, J. Strandberg64, S. Strandberg40, M. A. Strang69, M. Strauss75, E. Strauss72, R. Ströhmer24, D. Strom53, M. Strovink46, L. Stutte50, S. Sumowidagdo49, P. Svoisky55, A. Sznajder3, M. Talby14, P. Tamburello45, A. Tanasijczuk1, W. Taylor5, P. Telford44, J. Temple45, B. Tiller24, F. Tissandier12, M. Titov17, V. V. Tokmenin35, M. Tomoto50, T. Toole61, I. Torchiani22, T. Trefzger23, D. Tsybychev72, B. Tuchming17, C. Tully68, P. M. Tuts70, R. Unalan65, S. Uvarov39, L. Uvarov39, S. Uzunyan52, B. Vachon5, P. J. van den Berg33, B. van Eijk33, R. Van Kooten54, W. M. van Leeuwen33, N. Varelas51, E. W. Varnes45, A. Vartapetian78, I. A. Vasilyev38, M. Vaupel25, P. Verdier19, L. S. Vertogradov35, M. Verzocchi50, F. Villeneuve-Seguier43, P. Vint43, J.-R. Vlimant16, P. Vokac9, E. Von Toerne59, M. Voutilainen67,§, M. Vreeswijk33, R. Wagner68, H. D. Wahl49, L. Wang61, M. H. L. S Wang50, J. Warchol55, G. Watts82, M. Wayne55, M. Weber50, G. Weber23, H. Weerts65, A. Wenger22,∥, N. Wermes21, M. Wetstein61, A. White78, D. Wicke25, G. W. Wilson58, S. J. Wimpenny48, M. Wobisch60, D. R. Wood63, T. R. Wyatt44, Y. Xie77, S. Yacoob53, R. Yamada50, M. Yan61, T. Yasuda50, Y. A. Yatsunenko35, K. Yip73, H. D. Yoo77, S. W. Youn53, J. Yu78, C. Yu13, A. Yurkewicz72, A. Zatserklyaniy52, C. Zeitnitz25, D. Zhang50, T. Zhao82, B. Zhou64, J. Zhu72, M. Zielinski71, D. Zieminska54, A. Zieminski54, L. Zivkovic70, V. Zutshi52, and E. G. Zverev37 (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
  • 4Instituto de Física Teórica, Universidade Estadual Paulista, São Paulo, Brazil
  • 5University of Alberta, Edmonton, Alberta, Canada, Simon Fraser University, Burnaby, British Columbia, Canada, York University, Toronto, Ontario, Canada, and McGill University, Montreal, Quebec, Canada
  • 6University of Science and Technology of China, Hefei, People’s Republic of China
  • 7Universidad de los Andes, Bogotá, Colombia
  • 8Center for Particle Physics, Charles University, Prague, Czech Republic
  • 9Czech Technical University, 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
  • 12Laboratoire de Physique Corpusculaire, IN2P3-CNRS, Université Blaise Pascal, Clermont-Ferrand, France
  • 13Laboratoire de Physique Subatomique et de Cosmologie, IN2P3-CNRS, Universite de Grenoble 1, Grenoble, France
  • 14CPPM, IN2P3-CNRS, Université de la Méditerranée, Marseille, France
  • 15Laboratoire de l’Accélérateur Linéaire, IN2P3-CNRS et Université Paris-Sud, Orsay, France
  • 16LPNHE, IN2P3-CNRS, Universités Paris VI and VII, Paris, France
  • 17DAPNIA/Service de Physique des Particules, CEA, Saclay, France
  • 18IPHC, Université Louis Pasteur et Université de Haute Alsace, CNRS, IN2P3, Strasbourg, France
  • 19IPNL, Université Lyon 1, CNRS/IN2P3, Villeurbanne, France and Université de Lyon, Lyon, France
  • 20III. Physikalisches Institut A, RWTH Aachen, Aachen, Germany
  • 21Physikalisches Institut, Universität Bonn, Bonn, Germany
  • 22Physikalisches Institut, Universität Freiburg, Freiburg, Germany
  • 23Institut für Physik, Universität Mainz, Mainz, Germany
  • 24Ludwig-Maximilians-Universität München, München, Germany
  • 25Fachbereich Physik, University of 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
  • 31SungKyunKwan University, Suwon, Korea
  • 32CINVESTAV, Mexico City, Mexico
  • 33FOM-Institute NIKHEF and University of Amsterdam/NIKHEF, Amsterdam, The Netherlands
  • 34Radboud University Nijmegen/NIKHEF, Nijmegen, The Netherlands
  • 35Joint Institute for Nuclear Research, Dubna, Russia
  • 36Institute for Theoretical and Experimental Physics, Moscow, Russia
  • 37Moscow State University, Moscow, Russia
  • 38Institute for High Energy Physics, Protvino, Russia
  • 39Petersburg Nuclear Physics Institute, St. Petersburg, Russia
  • 40Lund University, Lund, Sweden, Royal Institute of Technology and Stockholm University, Stockholm, Sweden, and Uppsala University, Uppsala, Sweden
  • 41Physik Institut der Universität Zürich, Zürich, Switzerland
  • 42Lancaster University, Lancaster, United Kingdom
  • 43Imperial College, London, United Kingdom
  • 44University of Manchester, Manchester, United Kingdom
  • 45University of Arizona, Tucson, Arizona 85721, USA
  • 46Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA
  • 47California State University, Fresno, California 93740, USA
  • 48University of California, Riverside, California 92521, USA
  • 49Florida State University, Tallahassee, Florida 32306, USA
  • 50Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
  • 51University of Illinois at Chicago, Chicago, Illinois 60607, USA
  • 52Northern Illinois University, DeKalb, Illinois 60115, USA
  • 53Northwestern University, Evanston, Illinois 60208, USA
  • 54Indiana University, Bloomington, Indiana 47405, USA
  • 55University of Notre Dame, Notre Dame, Indiana 46556, USA
  • 56Purdue University Calumet, Hammond, Indiana 46323, USA
  • 57Iowa State University, Ames, Iowa 50011, USA
  • 58University of Kansas, Lawrence, Kansas 66045, USA
  • 59Kansas State University, Manhattan, Kansas 66506, USA
  • 60Louisiana Tech University, Ruston, Louisiana 71272, USA
  • 61University of Maryland, College Park, Maryland 20742, USA
  • 62Boston University, Boston, Massachusetts 02215, USA
  • 63Northeastern University, Boston, Massachusetts 02115, USA
  • 64University of Michigan, Ann Arbor, Michigan 48109, USA
  • 65Michigan State University, East Lansing, Michigan 48824, USA
  • 66University of Mississippi, University, Mississippi 38677, USA
  • 67University of Nebraska, Lincoln, Nebraska 68588, USA
  • 68Princeton University, Princeton, New Jersey 08544, USA
  • 69State University of New York, Buffalo, New York 14260, USA
  • 70Columbia University, New York, New York 10027, USA
  • 71University of Rochester, Rochester, New York 14627, USA
  • 72State University of New York, Stony Brook, New York 11794, USA
  • 73Brookhaven National Laboratory, Upton, New York 11973, USA
  • 74Langston University, Langston, Oklahoma 73050, USA
  • 75University of Oklahoma, Norman, Oklahoma 73019, USA
  • 76Oklahoma State University, Stillwater, Oklahoma 74078, USA
  • 77Brown University, Providence, Rhode Island 02912, USA
  • 78University of Texas, Arlington, Texas 76019, USA
  • 79Southern Methodist University, Dallas, Texas 75275, USA
  • 80Rice University, Houston, Texas 77005, USA
  • 81University of Virginia, Charlottesville, Virginia 22901, USA
  • 82University of Washington, Seattle, Washington 98195, USA

  • *Visitor from Augustana College, Sioux Falls, SD, USA.
  • Visitor from The University of Liverpool, Liverpool, UK.
  • Visitor from ICN-UNAM, Mexico City, Mexico.
  • §Visitor from Helsinki Institute of Physics, Helsinki, Finland.
  • Visitor from Universität Zürich, Zürich, Switzerland.

Phys. Rev. D 76, 052006 – Published 28 September, 2007

DOI: https://doi.org/10.1103/PhysRevD.76.052006

Abstract

We present a measurement of the tt¯ pair production cross section in pp¯ collisions at s=1.96TeV utilizing approximately 425pb1 of data collected with the D0 detector. We consider decay channels containing two high pT charged leptons (either e or μ) from leptonic decays of both top-daughter W bosons. These were gathered using four sets of selection criteria, three of which required that a pair of fully identified leptons (i.e., eμ, ee, or μμ) be found. The fourth approach imposed less restrictive criteria on one of the lepton candidates and required that at least one hadronic jet in each event be tagged as containing a b quark. For a top quark mass of 175 GeV, the measured cross section is 7.4±1.4(stat)±1.0(syst)pb and for the current Tevatron average top quark mass of 170.9 GeV, the resulting value of the cross section is 7.8±1.8(stat+syst)pb.

Article Text

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