Skip to main navigation Skip to search Skip to main content

Measurement of leptonic asymmetries and top-quark polarization in tt̄ production

  • V. M. Abazov*
  • , B. Abbott
  • , B. S. Acharya
  • , M. Adams
  • , T. Adams
  • , G. D. Alexeev
  • , G. Alkhazov
  • , A. Alton
  • , G. Alverson
  • , A. Askew
  • , S. Atkins
  • , K. Augsten
  • , C. Avila
  • , F. Badaud
  • , L. Bagby
  • , B. Baldin
  • , D. V. Bandurin
  • , S. Banerjee
  • , E. Barberis
  • , P. Baringer
  • J. F. Bartlett, U. Bassler, V. Bazterra, A. Bean, M. Begalli, L. Bellantoni, S. B. Beri, G. Bernardi, R. Bernhard, I. Bertram, M. Besançon, R. Beuselinck, P. C. Bhat, S. Bhatia, V. Bhatnagar, G. Blazey, S. Blessing, K. Bloom, A. Boehnlein, D. Boline, E. E. Boos, G. Borissov, T. Bose, A. Brandt, O. Brandt, R. Brock, A. Bross, D. Brown, J. Brown, X. B. Bu, M. Buehler, V. Buescher, V. Bunichev, S. Burdin, C. P. Buszello, E. Camacho-Pérez, B. C.K. Casey, H. Castilla-Valdez, S. Caughron, S. Chakrabarti, D. Chakraborty, K. M. Chan, A. Chandra, E. Chapon, G. Chen, S. Chevalier-Théry, D. K. Cho, S. W. Cho, S. Choi, B. Choudhary, S. Cihangir, D. Claes, J. Clutter, M. Cooke, W. E. Cooper, M. Corcoran, F. Couderc, M. C. Cousinou, A. Croc, D. Cutts, A. Das, G. Davies, S. J. De Jong, E. De La Cruz-Burelo, F. Déliot, R. Demina, D. Denisov, S. P. Denisov, S. Desai, C. Deterre, K. Devaughan, H. T. Diehl, M. Diesburg, P. F. Ding, A. Dominguez, A. Dubey, L. V. Dudko, D. Duggan, A. Duperrin, S. Dutt, A. Dyshkant, M. Eads, D. Edmunds, J. Ellison, V. D. Elvira, Y. Enari, H. Evans, A. Evdokimov, V. N. Evdokimov, G. Facini, L. Feng, T. Ferbel, F. Fiedler, F. Filthaut, W. Fisher, H. E. Fisk, M. Fortner, H. Fox, S. Fuess, A. Garcia-Bellido, J. A. García-González, G. A. García-Guerra, V. Gavrilov, P. Gay, W. Geng, D. Gerbaudo, C. E. Gerber, Y. Gershtein, G. Ginther, G. Golovanov, A. Goussiou, P. D. Grannis, S. Greder, H. Greenlee, G. Grenier, Ph Gris, J. F. Grivaz, A. Grohsjean, S. Grünendahl, M. W. Grünewald, T. Guillemin, G. Gutierrez, P. Gutierrez, S. Hagopian, J. Haley, L. Han, K. Harder, A. Harel, J. M. Hauptman, J. Hays, T. Head, T. Hebbeker, D. Hedin, H. Hegab, A. P. Heinson, U. Heintz, C. Hensel, I. Heredia-De La Cruz, K. Herner, G. Hesketh, M. D. Hildreth, R. Hirosky, T. Hoang, J. D. Hobbs, B. Hoeneisen, J. Hogan, M. Hohlfeld, I. Howley, Z. Hubacek, V. Hynek, I. Iashvili, Y. Ilchenko, R. Illingworth, A. S. Ito, S. Jabeen, M. Jaffré, A. Jayasinghe, M. S. Jeong, R. Jesik, K. Johns, E. Johnson, M. Johnson, A. Jonckheere, P. Jonsson, J. Joshi, A. W. Jung, A. Juste, K. Kaadze, E. Kajfasz, D. Karmanov, P. A. Kasper, I. Katsanos, R. Kehoe, S. Kermiche, N. Khalatyan, A. Khanov, A. Kharchilava, Y. N. Kharzheev, I. Kiselevich, J. M. Kohli, A. V. Kozelov, J. Kraus, S. Kulikov, A. Kumar, A. Kupco, T. Kurča, V. A. Kuzmin, S. Lammers, G. Landsberg, P. Lebrun, H. S. Lee, S. W. Lee, W. M. Lee, X. Lei, J. Lellouch, H. Li, L. Li, Q. Z. Li, J. K. Lim, D. Lincoln, J. Linnemann, V. V. Lipaev, R. Lipton, H. Liu, Y. Liu, A. Lobodenko, M. Lokajicek, R. Lopes De Sa, H. J. Lubatti, R. Luna-Garcia, A. L. Lyon, A. K.A. MacIel, R. Madar, R. Magaña-Villalba, S. Malik, V. L. Malyshev, Y. Maravin, J. Martínez-Ortega, R. McCarthy, C. L. McGivern, M. M. Meijer, A. Melnitchouk, D. Menezes, P. G. Mercadante, M. Merkin, A. Meyer, J. Meyer, F. Miconi, N. K. Mondal, M. Mulhearn, E. Nagy, M. Naimuddin, M. Narain, R. Nayyar, H. A. Neal, J. P. Negret, P. Neustroev, T. Nunnemann, D. Orbaker, J. Orduna, N. Osman, J. Osta, M. Padilla, A. Pal, N. Parashar, V. Parihar, S. K. Park, R. Partridge, N. Parua, A. Patwa, B. Penning, M. Perfilov, Y. Peters, K. Petridis, G. Petrillo, P. Pétroff, M. A. Pleier, P. L.M. Podesta-Lerma, V. M. Podstavkov, A. V. Popov, M. Prewitt, D. Price, N. Prokopenko, J. Qian, A. Quadt, B. Quinn, M. S. Rangel, K. Ranjan, P. N. Ratoff, I. Razumov, P. Renkel, I. Ripp-Baudot, F. Rizatdinova, M. Rominsky, A. Ross, C. Royon, P. Rubinov, R. Ruchti, G. Sajot, P. Salcido, A. Sánchez-Hernández, M. P. Sanders, A. S. Santos, G. Savage, L. Sawyer, T. Scanlon, R. D. Schamberger, Y. Scheglov, H. Schellman, S. Schlobohm, C. Schwanenberger, R. Schwienhorst, J. Sekaric, H. Severini, E. Shabalina, V. Shary, S. Shaw, A. A. Shchukin, R. K. Shivpuri, V. Simak, P. Skubic, P. Slattery, D. Smirnov, K. J. Smith, G. R. Snow, J. Snow, S. Snyder, S. Söldner-Rembold, L. Sonnenschein, K. Soustruznik, J. Stark, D. A. Stoyanova, M. Strauss, L. Suter, P. Svoisky, M. Takahashi, M. Titov, V. V. Tokmenin, Y. T. Tsai, K. Tschann-Grimm, D. Tsybychev, B. Tuchming, C. Tully, L. Uvarov, S. Uvarov, S. Uzunyan, R. Van Kooten, W. M. Van Leeuwen, N. Varelas, E. W. Varnes, I. A. Vasilyev, P. Verdier, A. Y. Verkheev, L. S. Vertogradov, M. Verzocchi, M. Vesterinen, D. Vilanova, P. Vokac, H. D. Wahl, M. H.L.S. Wang, J. Warchol, G. Watts, M. Wayne, J. Weichert, L. Welty-Rieger, A. White, D. Wicke, M. R.J. Williams, G. W. Wilson, M. Wobisch, D. R. Wood, T. R. Wyatt, Y. Xie, R. Yamada, S. Yang, W. C. Yang, T. Yasuda, Y. A. Yatsunenko, W. Ye, Z. Ye, H. Yin, K. Yip, S. W. Youn, J. M. Yu, J. Zennamo, T. Zhao, T. G. Zhao, B. Zhou, J. Zhu, M. Zielinski, D. Zieminska, L. Zivkovic
*Corresponding author for this work
  • Institute for Theoretical and Experimental Physics
  • University of Oklahoma Bioengineering Center
  • Tata Institute of Fundamental Research, Mumbai
  • University of Illinois at Chicago
  • Florida State University
  • Joint Institute for Nuclear Research, Dubna
  • Petersburg Nuclear Physics Institute (PNPI)
  • University of Michigan, Ann Arbor
  • Northeastern University
  • Louisiana Tech University
  • Czech Technical University in Prague
  • Universidad de los Andes Colombia
  • Université Blaise Pascal
  • Fermi National Accelerator Laboratory
  • University of Kansas
  • CEA Saclay
  • Universidade do Estado do Rio de Janeiro
  • Panjab University
  • Universités Paris VI and VII
  • University of Freiburg
  • Lancaster University
  • Imperial College London
  • University of Mississippi
  • Northern Illinois University
  • University of Nebraska-Lincoln
  • Stony Brook University
  • Lomonosov Moscow State University
  • Boston University
  • University of Texas at Arlington
  • Georg-August-Universität Göttingen
  • Michigan State University
  • Johannes Gutenberg University Mainz
  • Uppsala University
  • Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional
  • University of Notre Dame
  • Rice University
  • Brown University
  • Korea University
  • University of Delhi
  • Aix-Marseille Université
  • University of Arizona
  • FOM-Institute NIKHEF and University of Amsterdam/NIKHEF
  • Radboud University
  • University of Rochester
  • Institute for High Energy Physics
  • University of Manchester
  • Rutgers University–New Brunswick
  • University of California at Riverside
  • Indiana University Bloomington
  • Brookhaven National Laboratory
  • Princeton University
  • University of Washington
  • Université de Strasbourg
  • Universite Claude Bernard Lyon 1
  • Université de Lyon
  • Université Paris-Sud
  • University College Dublin
  • University of Science and Technology of China
  • Iowa State University
  • RWTH Aachen University
  • Oklahoma State University
  • University of Virginia
  • State University of New York at Buffalo
  • Southern Methodist University
  • The Barcelona Institute of Science and Technology
  • Kansas State University
  • Czech Academy of Sciences
  • Université Joseph Fourier Grenoble 1
  • Centro Brasileiro de Pesquisas Físicas
  • Universidade Federal do ABC
  • Ludwig Maximilian University of Munich
  • Purdue University Calumet
  • Northwestern University
  • Langston University
  • Charles University
  • University of Wuppertal

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

We present measurements of lepton (ℓ) angular distributions in top-quark (t) pair production and tt̄→W+bW -b̄→ℓ+νbℓ -ν̄b̄ decays produced in pp̄ collisions at a center-of-mass energy of √s=1.96 TeV, where ℓ is an electron or muon. Using data corresponding to an integrated luminosity of 5.4 fb-1, collected with the D0 detector at the Fermilab Tevatron Collider, we measure for the first time the leptonic forward-backward asymmetry in dilepton final states and obtain AFBℓ=(5.8±5.1(stat)±1.3(syst))%, corrected for detector acceptance. This is compared to the standard model prediction of AFBℓ(predicted)=(4.7±0.1)%. A deviation from the standard model prediction as previously seen in a D0 measurement based on the analysis of the ℓ+jets final state is not observed in these dilepton final states. The two results differ from each other by 1.4 standard deviations and are combined to obtain AFBℓ=(11.8±3.2)%. Furthermore, we present a first study of the top-quark polarization.

Original languageEnglish
Article number011103
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume87
Issue number1
DOIs
StatePublished - 24 Jan 2013

Fingerprint

Dive into the research topics of 'Measurement of leptonic asymmetries and top-quark polarization in tt̄ production'. Together they form a unique fingerprint.

Cite this